TEXAS INSTRUMENTS TMP512, TMP513 Technical data

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GND

GPIO

IN+

IN-

ALERT

SDA

SCL

ADC

TMP512 TMP513

DXP1

DXN1

DXP2

DXN2

Subregulator

3.3V

V+

Filter C

Two-Wire Interface

Power Register

Current Register

Voltage Register

ADC

Low-Pass Filter

Internal

Diode

Temperature

Sensor

Mux

DXP3

DXN3

TMP512 TMP513

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SBOS491 –JUNE 2010

Temperature and Power Supply System Monitors

Check for Samples: TMP512, TMP513

FEATURES

234

• ±1°C REMOTE DIODE SENSORS

• ±1°C LOCAL TEMPERATURE SENSOR

• SERIES RESISTANCE CANCELLATION

• n-FACTOR CORRECTION

• TEMPERATURE ALERT FUNCTION temperatures, on-chip temperatures, and system

• AVERAGING

• 12-BIT RESOLUTION

• DIODE FAULT DETECTION

• SENSES BUS VOLTAGES FROM 0V TO +26V

• REPORTS CURRENT IN AMPS, VOLTAGE IN Remote accuracy is ±1°C for multiple IC

VOLTS AND POWER IN WATTS

• HIGH ACCURACY: 1% MAX OVER TEMP

• WATCHDOG LIMITS: – Upper Over-Limit – Lower Under-Limit

APPLICATIONS

• DESKTOP AND NOTEBOOK COMPUTERS

• SERVERS

• INDUSTRIAL CONTROLLERS

• CENTRAL OFFICE TELECOM EQUIPMENT

• LCD/ DLP®/LCOS PROJECTORS

• STORAGE AREA NETWORKS (SAN)

DESCRIPTION

The TMP512 (dual-channel) and TMP513 (triple-channel) are system monitors that include remote sensors, a local temperature sensor, and a high-side current shunt monitor. These system monitors have the capability of measuring remote

voltage/power/current consumption. The remote temperature sensor diode-connected

transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or FPGAs.

manufacturers, with no calibration needed. The two-wire serial interface accepts SMBus™ or two-wire write and read commands.

The onboard current shunt monitor is a high-side current shunt and power monitor. It monitors both the shunt drop and supply voltage. A programmable calibration value (along with the TMP512/TMP513 internal digital multiplier) enables direct readout in amps; an additional multiplication calculates power in watts. The TMP512 and TMP513 both feature two separate onboard watchdog capabilities: an over-limit comparator and a lower-limit comparator.

These devices use a single +3V to +26V supply, drawing a maximum of 1.4mA of supply current, and they are specified for operation from –40°C to +125°C.

2DLP is a registered trademark of Texas Instruments. 3SMBus is a trademark of Intel Corporation. 4All other trademarks are the property of their respective owners.

UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

TMP512 TMP513

SBOS491 –JUNE 2010

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This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

PACKAGE INFORMATION

(1)

PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR PACKAGE MARKING

TMP512 SO-14 D TMP512A

TMP513

SO-16 D TMP513A

(2)

QFN-16

RSA TMP513A

(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or visit the

TMP512/TMP513 product folder at www.ti.com.

(2) Product preview device.

ABSOLUTE MAXIMUM RATINGS

(1)

Over operating free-air temperature range (unless otherwise noted).

TMP512, TMP513 UNIT

Supply Voltage, V+ 26 V

Filter C

Analog Inputs, V

IN+

, V

IN–

Open-Drain Digital Outputs GND – 0.3 to +6 V GPIO, DXP, DXN GND – 0.3 to V+ + 0.3 V Input Current Into Any Pin 5 mA Open-Drain Digital Output Current 10 mA Storage Temperature –65 to +150 °C Junction Temperature +150 °C

ESD Ratings Charged-Device Model (CDM) 1000 V

(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may

degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied.

(2) V

IN+

+26V.

and V

may have a differential voltage of –26V to +26V; however, the voltage at these pins must not exceed the range –0.3V to

IN–

Voltage GND – 0.3 to +6 V Current 10 mA Differential (V

IN+

) – (V

IN–

(2)

)

–26 to +26 V

Common-Mode –0.3 to +26 V

Human Body Model (HBM) 2000 V

Machine Model (MM) 150 V

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SBOS491 –JUNE 2010

THERMAL INFORMATION

TMP512 TMP513AID

THERMAL METRIC

(1)

D (SOIC) D (SOIC) RSA

14 16 16

JC(top)

JC(bottom)

Junction-to-ambient thermal resistance Junction-to-case(top) thermal resistance Junction-to-board thermal resistance Junction-to-top characterization parameter Junction-to-board characterization parameter Junction-to-case(bottom) thermal resistance

(2)

(3)

(4)

(5)

(6)

(7)

91.1 77.6 44.8

10.6 55.0 43.8

40.3 49.9 14.7

49.1 3.5 0.4

47.5 32.2 14.5 n/a n/a 2.6

(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. (2) The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as

specified in JESD51-7, in an environment described in JESD51-2a.

(3) The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific

JEDEC-standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.

(4) The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB

temperature, as described in JESD51-8.

(5) The junction-to-top characterization parameter, yJT, estimates the junction temperature of a device in a real system and is extracted

from the simulation data for obtaining qJA, using a procedure described in JESD51-2a (sections 6 and 7).

(6) The junction-to-board characterization parameter, yJB, estimates the junction temperature of a device in a real system and is extracted

from the simulation data for obtaining qJA, using a procedure described in JESD51-2a (sections 6 and 7).

(7) The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific

JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.

TMP513AIRSAR TMP513AIRSAT

UNITS

°C/W

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ELECTRICAL CHARACTERISTICS: V+ = +12V

Boldface limits apply over the specified temperature range, TA= –40°C to +125°C.

At TA= +25°C, V+ = 12V, V

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

INPUT

Current Sense (Input) Voltage Range PGA = ÷ 1 0 ±40 mV

Bus Voltage (Input Voltage) Range

Common-Mode Rejection CMRR V Offset Voltage, RTI

vs Temperature 0.2 mV/°C

vs Power Supply PSRR

Current Sense Gain Error ±0.04 %

vs Temperature 0.0025 %

Input Impedance Active Mode

IN+

IN–

Input Leakage Power-Down Mode

IN+

IN–

DC ACCURACY

ADC Basic Resolution 12 Bits 1 LSB Step Size

Shunt Voltage 10 mV Bus Voltage 4 mV

Current Measurement Error ±0.2 ±0.5 %

over Temperature ±1 %

Bus Voltage Measurement Error ±0.2 ±0.5 %

over Temperature ±1 %

Differential Nonlinearity ±0.1 LSB

ADC TIMING

ADC Conversion Time 12-Bit 665 733 ms

(1) BRNG is bit 13 of Configuration Register 1. (2) This parameter only expresses the full-scale range of the ADC scaling. In no event should more than 26V be applied to this device. (3) Referred-to-input (RTI). (4) See Subregulator section.

(3)

Pin 20 mA Pin 20 || 320 mA || kΩ

Pin 0.1 0.5 mA Pin 0.1 0.5 mA

SENSE

(2)

= (V

IN+

– V

) = 32mV, PGA = ÷ 1, and BRNG

IN–

PGA = ÷ 2 0 ±80 mV PGA = ÷ 4 0 ±160 mV PGA = ÷ 8 0 ±320 mV BRNG = 0 0 16 V BRNG = 1 0 32 V

= 0V to 26V 100 120 dB

IN+

V+ = 3V to 5.5V, Configuration 3

V+ = 4.5V to 26V, subregulator supply 0.1 mV/V

PGA = ÷ 1 ±10 ±100 mV PGA = ÷ 2 ±20 ±125 mV PGA = ÷ 4 ±30 ±150 mV PGA = ÷ 8 ±40 ±200 mV

11-Bit 345 380 ms 10-Bit 185 204 ms

9-Bit 105 117 ms

(1)

= 1, unless otherwise noted.

TMP512, TMP513

(4)

10 mV/V

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SBOS491 –JUNE 2010

ELECTRICAL CHARACTERISTICS: V+ = +12V (continued)

Boldface limits apply over the specified temperature range, TA= –40°C to +125°C.

At TA= +25°C, V+ = 12V, V

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

TEMPERATURE ERROR

Local Temperature Sensor TE

Remote Temperature Sensor

vs Supply, Local V+ = 3V to 5.5V, Configuration 3

vs Supply, Remote

TEMPERATURE MEASUREMENT

Conversion Time (per channel) 100 115 130 ms Resolution Local Temperature Sensor 13 Bits Remote Temperature Sensor 13 Bits Remote Sensor Source Currents Series Resistance 3kΩ max High 120 mA Medium High 60 mA Medium Low 12 mA Low 6 mA Default Non-Ideality Factor n TMP512/12 Optimized Ideality Factor 1.008

SMBus Logic Input High Voltage (SCL, SDA, GPIO,

A0) Logic Input Low Voltage (SCL, SDA, GPIO,

A0)

Hysteresis 500 mV

SMBus Output Low Sink Current 6 mA SDA Output Low Voltage V Logic Input Current 0 ≤ VIN≤ 6V –1 1 mA

SMBus Input Capacitance (SCL, SDA, GPIO, A0) 3 pF

SMBus Clock Frequency 3.4 MHz SMBus Timeout SCL Falling Edge to SDA Valid Time 1 ms POWER SUPPLY

Specified Supply Range Quiescent Current 1 1.4 mA Quiescent Current, Power-Down Mode 55 100 mA Power-On Reset Threshold 2 V

TEMPERATURE RANGE

Specified Temperature Range –40 +125 °C

(7)

(5) Tested with one-shot measurements, and with less than 5Ω effective series resistance, and with 100pF differential input capacitance. (6) See Subregulator section. (7) SMBus timeout in the TMP512/13 resets the interface any time SCL or SDA is low for over 28ms.

(5)

(6)

SENSE

= (V

– V

IN+

) = 32mV, PGA = ÷ 1, and BRNG

IN–

LOCAL

REMOTE

V+ +3 +26 V

TA= –40°C to +125°C ±1.25 ±2.5 °C

TA= +15°C to +85°C, V+ = 12V ±0.25 ±1 °C

TA= +15°C to +85°C, TD= –40°C to+

TA= –40°C to +100°C, TD= –40°C to

TA= –40°C to +125°C, TD= –40°C to

V+ = 4.5V to 26V, subregulator supply 0.01 0.05 °C/V

150°C, V+ = 12V

+150°C, V+ = 12V

+150°C

V+ = 3V to 5.5V, Configuration 3

= 6mA 0.15 0.4 V

OUT

(1)

= 1, unless otherwise noted.

TMP512, TMP513

±0.25 ±1 °C

(6) (6)

2.1 V

25 30 35 ms

±1 ±3 °C

±3 ±5 °C

0.2 0.5 °C/V

0.8 V

Product Folder Link(s): TMP512 TMP513

IN-

SDA

SCL

IN+

V+

Filter C

DXP2

DXN1

DXP1

GPIO

ALERT

GND

DXN2

TMP512

TMP512 TMP513

SBOS491 –JUNE 2010

PIN CONFIGURATIONS

TMP512

space

D PACKAGE

SO-14

(TOP VIEW)

TMP512: PIN DESCRIPTIONS

PIN NO. NAME DESCRIPTION

1 Filter C Subregulator output and filter capacitor pin. 2 V+ Positive supply voltage (3V to 26V) See Figure 20. 3 V

4 V

IN+

IN-

5 SDA Serial bus data line for SMBus, open-drain; requires pull-up resistor. 6 SCL Serial bus clock line for SMBus, open-drain; requires pull-up resistor. 7 A0 Address pin 8 DXP1 Channel 1 positive connection to remote temperature sensor.

9 DXN1 Channel 1 negative connection to remote temperature sensor. 10 DXP2 Channel 2 positive connection to remote temperature sensor. 11 DXN2 Channel 2 negative connection to remote temperature sensor.

12 GPIO 13 ALERT Open-drain SMBus alert output. Controlled in SMBus Alert Mask Register. Default state is disabled.

14 GND Ground

Positive differential shunt voltage. Connect to positive side of shunt resistor. Negative differential shunt voltage. Connect to negative side of shunt resistor. Bus voltage is measured

from this pin to ground.

General-purpose, user-programmable input/output. Totem-pole output. Connect to ground or supply through a resistor if not used. Default state is as an input.

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Filter C

V+

IN+

IN-

SDA

SCL

DXP1

GND

ALERT

GPIO

DXN3

DXP3

DXN2

DXP2

DXN1

TMP513

IN+

IN-

SDA

SCL

GPIO

DXN3

DXP3

DXN2

FilterC

DXP1

DXN1

DXP2

ALERT

GND

V+

TMP513

TMP512 TMP513

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TMP513

space

D PACKAGE

SO-16

(TOP VIEW)

(1) Product preview device.

TMP513: PIN DESCRIPTIONS

D PACKAGE PACKAGE

SO-16 QFN-16 NAME DESCRIPTION

1 15 Filter C Subregulator output and filter capacitor pin. 2 16 V+ Positive supply voltage (3V to 26V) See Figure 20. 3 1 V

4 2 V 5 3 SDA Serial bus data line for SMBus, open-drain; requires pull-up resistor.

6 4 SCL Serial bus clock line for SMBus, open-drain; requires pull-up resistor. 7 5 A0 Address pin 8 6 DXP1 Channel 1 positive connection to remote temperature sensor.

9 7 DXN1 Channel 1 negative connection to remote temperature sensor. 10 8 DXP2 Channel 2 positive connection to remote temperature sensor. 11 9 DXN2 Channel 2 negative connection to remote temperature sensor. 12 10 DXP3 Channel 3 positive connection to remote temperature sensor. 13 11 DXN3 Channel 3 negative connection to remote temperature sensor.

14 12 GPIO

15 13 ALERT 16 14 GND Ground

RSA

IN+

IN-

Positive differential shunt voltage. Connect to positive side of shunt resistor. Negative differential shunt voltage. Connect to negative side of shunt resistor. Bus voltage is

measured from this pin to ground.

General-purpose, user-programmable input/output. Totem-pole output. Connect to ground or supply through a resistor if not used. Default state is as an input.

Open-drain SMBus alert output. Controlled in SMBus Alert Mask Register. Default state is disabled.

RSA PACKAGE

SBOS491 –JUNE 2010

(1)

QFN-16

(TOP VIEW)

Product Folder Link(s): TMP512 TMP513

-40 -25 0 25 50

100 125

Remote Temperature Error ( C)?

Ambient Temperature ( C)?

34 Units Shown

100

10k 100k

Gain(dB)

InputFrequency(Hz)

100

-40

-25

25 50

75 100

Local Temperature Error ( C)°

Ambient Temperature ( C)°

125

14 Units Shown

2.0

1.5

1.0

0.5

1.0

1.5

2.0

-40

-25

25 50

75 100

Offset( V)m

Temperature( C)°

125

40mVRange

80mVRange

160mVRange

320mVRange

-40

-25

25 50

75 100

GainError(m%)

Temperature( C)°

125

250

200

150

100

100--

320mVRange

160mVRange

80mVRange

40mVRange

-40

-25

25 50

75 100

Offset (mV)

Temperature ( C)°

125

32V Range

16V Range

TMP512 TMP513

SBOS491 –JUNE 2010

At TA= +25°C, V+ = 12V, V

LOCAL TEMPERATURE ERROR vs TEMPERATURE SHUNT OFFSET vs TEMPERATURE

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TYPICAL CHARACTERISTICS: V+ = +12V

= (V

– V

SENSE

IN+

FREQUENCY RESPONSE REMOTE TEMPERATURE ERROR vs TEMPERATURE

Figure 1. Figure 2.

) = 32mV, PGA = ÷ 1, and BRNG = 1, unless otherwise noted.

IN–

Figure 3. Figure 4.

SHUNT GAIN ERROR vs TEMPERATURE BUS VOLTAGE OFFSET vs TEMPERATURE

Figure 5. Figure 6.

Product Folder Link(s): TMP512 TMP513

-5

-10

-15

-20

-0.4

-0.3

-0.2

-0.1 0

0.1 0.2 0.3

INL( V)m

InputVoltage(V)

0.4

-40

-25

25 50

75 100

Gain Error (m%)

Temperature ( C)°

125

250

200

150

100

100--

32V Range

16V Range

15 20

Input Currents (mA)

V Voltage (V)

IN-

2.0

1.5

1.0

0.5

1.0

1.5

V+ = 5.5V

V+ 5.5V=

V+ = 3V

V+ 3V=

Current into V

IN-

Current into V

IN+

-40

-25

25 50

75 100

I (mA)

Temperature ( C)°

125

V+ = 5.5V

V+ = 12V

V+ = 3V

1.4

1.2

1.0

0.8

0.6

0.4

0.2

TMP512 TMP513

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At TA= +25°C, V+ = 12V, V

BUS GAIN ERROR vs TEMPERATURE INTEGRAL NONLINEARITY vs INPUT VOLTAGE

INPUT CURRENTS WITH LARGE DIFFERENTIAL

IN+

TYPICAL CHARACTERISTICS: V+ = +12V (continued)

= (V

– V

SENSE

IN+

Figure 7. Figure 8.

VOLTAGES

at 12V, Sweep of V

) = 32mV, PGA = ÷ 1, and BRNG = 1, unless otherwise noted.

IN–

) ACTIVE IQvs TEMPERATURE

IN–

SBOS491 –JUNE 2010

Figure 9. Figure 10.

Product Folder Link(s): TMP512 TMP513

I ( )

V (SV)

4.53.0 3.5 4.0 5.55.02.5

120

100

Note: Shutdown I vs V is for Subregulator Configuration 3

Q S

-40

-25

125

I ( A)m

Temperature ( C)°

V+ = 5.5V

V+ = 12V

V+ = 3V

50 75 100

140

120

100

Note: Shutdown I vs Temperature is for Subregulator Configurations 1 and 2

10k

100k

10M

I ( A)m

SCL Frequency (Hz)

V+ = 12V

V+ = 3.3V

1100

1050

1000

950

900

850

800

10k

100k

10M

I ( A)m

SCL Frequency (Hz)

250

200

150

100

V+ = 12V

V+ = 3.3V

TMP512 TMP513

SBOS491 –JUNE 2010

At TA= +25°C, V+ = 12V, V

SHUTDOWN IQvs TEMPERATURE SUPPLY VOLTAGE

ACTIVE IQvs TWO-WIRE CLOCK FREQUENCY SHUTDOWN IQvs TWO-WIRE CLOCK FREQUENCY

TYPICAL CHARACTERISTICS: V+ = +12V (continued)

= (V

– V

SENSE

IN+

Figure 11. Figure 12.

) = 32mV, PGA = ÷ 1, and BRNG = 1, unless otherwise noted.

IN–

SHUTDOWN IQvs

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Figure 13. Figure 14.

Product Folder Link(s): TMP512 TMP513

Remote Temperature Error ( )°C

R ( W )

2.0

1.5

1.0

0.5

-0.5

-1.0

-1.5

-2.0

0 3500500 1000 1500 2000 2500 3000

Note: For all three subregulator configurations.

Remote Temperature Error ( )°C

R ( W )

2.0

1.5

1.0

0.5

-0.5

-1.0

-1.5

-2.0

0 3500500 1000 1500 2000 2500 3000

Note: For all three subregulator configurations.

-1

-2

-3

Capacitance(nF)

0 0.5 1.0 1.5 2.0 2.5 3.0

RemoteTemperatureError( C)°

TMP512 TMP513

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At TA= +25°C, V+ = 12V, V

REMOTE TEMPERATURE ERROR vs SERIES REMOTE TEMPERATURE ERROR vs SERIES

(Diode-Connected Transistor, 2N3906 PNP) (GND Collector-Connected Transistor, 2N3906 PNP)

TYPICAL CHARACTERISTICS: V+ = +12V (continued)

= (V

– V

SENSE

IN+

RESISTANCE RESISTANCE

Figure 15. Figure 16.

) = 32mV, PGA = ÷ 1, and BRNG = 1, unless otherwise noted.

IN–

REMOTE TEMPERATURE ERROR

vs DIFFERENTIAL CAPACITANCE

SBOS491 –JUNE 2010

Figure 17.

Product Folder Link(s): TMP512 TMP513

(b) Diode-Connected Transistor

(a) GND Collector-Connected Transistor

DXP

DXN

(1)

DXP

DXN

(1)

(b) Diode-ConnectedTransistor

(a) GNDCollector-ConnectedTransistor

DXP

DXN

DIFF

(1)

DXP

DXN

DIFF

(1)

TMP512 TMP513

SBOS491 –JUNE 2010

PARAMETRIC MEASUREMENT INFORMATION

TYPICAL CONNECTIONS

SERIES RESISTANCE CONFIGURATION

(1) RS1+ RS2should be less than 1kΩ; see Filtering section.

DIFFERENTIAL CAPACITANCE CONFIGURATION

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Figure 18.

(1) C

should be less than 2200pF; see Filtering section.

DIFF

Figure 19.

Product Folder Link(s): TMP512 TMP513

Configuration 1 Configuration 2 Configuration 3

GND

ADC

Subregulator

3.3V

Subregulator

3.3V

V+ = 4.5V to 26V

Filter C

Load

470nF

Bus Voltage Range = 4.5V to 26V

Shunt R

SHUNT

IN+

IN-

GND

ADC

V+ = 4.5V to 26V

Load

Filter C

470nF

Bus Voltage Range = 0V to 26V

Shunt R

SHUNT

IN+

IN-

GND

ADC

Subregulator

3.3V

V+ = 3V to 5.5V

Load

Filter C

100nF

Bus Voltage Range = 0V to 26V

Shunt R

SHUNT

IN+

IN-

TMP512 TMP513

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SBOS491 –JUNE 2010

APPLICATION INFORMATION

between the two systems is being addressed. Two

DESCRIPTION

The TMP512/13 are digital temperature sensors with a digital current-shunt monitor that combine a local die temperature measurement channel and remote junction temperature measurement channels: two for the TMP512 and three for the TMP513. The TMP512/13 contain multiple registers for holding The subregulator can be configured to three different configuration information, temperature, and voltage modes of operation. Each mode has its advantage measurement results. These devices provide digital and limitation. Figure 20 shows the three current, voltage, and power readings necessary for configuration arrangements. The minimum accurate decision-making in precisely-controlled capacitance on the Filter C pin for Configurations 1 systems. Programmable registers allow flexible and 2 is 470nF. The minimum capacitance on the configuration for setting warning limits, measurement Filter C pin for Configuration 3 is 100nF. resolution, and continuous-versus-triggered operation. Detailed register information appears at the end of this data sheet, beginning with Table 3.

For proper remote temperature sensing operation, the V+ supply range of 4.5V to 26V connected to the TMP512 requires transistors connected between shunt voltage, the bus voltage range cannot go to DXP1 and DXN1 and between DXP2 and DXN2, and zero and is limited to 4.5V to 26V. for the TMP513, between DXP3 and DXN3 as well. Unused channels on the TMP512/13 must be connected to GND.

The TMP512/13 offer compatibility with two-wire and is not limited to 4.5V as in Configuration 1. SMBus interfaces. The two-wire and SMBus protocols are essentially compatible with each other. Two-wire is used throughout this data sheet, with SMBus being specified only when a difference

bi-directional lines, SCL and SDA, connect the TMP512/13 to the bus. SDA is an open-drain connection. See Figure 21 for a typical application circuit.

SUBREGULATOR

Configuration 1 has V+ and V supplies the subregulator, which in turn supplies the

3.3V to the Filter C pin and the internal die. With the

Configuration 2 has V+ to the subregulator without any other connections. Under this configuration, the bus voltage range can go from 0V to 26V, because it

Configuration 3 has the subregulator V+ and Filter C pins shorted together. V+ is limited to 3V to 5.5V because the Filter C pin supplies the internal die; it cannot exceed this voltage range. The bus voltage range can go from 0V to 26V, because it is not limited to 4.5V as in Configuration 1.

tied together. V+

IN+

Figure 20. Typical Subregulator Configurations

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SERIES RESISTANCE CANCELLATION Local Temperature Result Register and the Remote

Series resistance in an application circuit that typically results from printed circuit board (PCB) trace resistance and remote line length is automatically cancelled by the TMP512/13, preventing what would otherwise result in a temperature offset. A total of up to 3kΩ of series line resistance is cancelled by the TMP512/13, eliminating the need for additional characterization and temperature offset correction. See the Remote Temperature Error vs Series Resistance typical characteristic curves (Figure 15 ) for details on the effects of series resistance and power-supply voltage on sensed remote temperature error.

Temperature Result Registers. Note that byte 1 is the

most significant byte, followed by byte 2, the least significant byte. The first 13 bits are used to indicate temperature. The least significant byte does not have to be read if that information is not needed. The data format for temperature is summarized in Table 10. One LSB equals 0.0625°C. Negative numbers are represented in binary twos complement format. Following power-up or reset, the Temperature Register will read 0°C until the first conversion is complete. Unused bits in the Temperature Register always read '0'.

REGISTER INFORMATION

DIFFERENTIAL INPUT CAPACITANCE The TMP512/13 contain multiple registers for holding

The TMP512/13 can tolerate differential input capacitance of up to 2200pF with minimal change in temperature error. The effect of capacitance on sensed remote temperature error is illustrated in

Figure 16, Remote Temperature Error vs Differential

Capacitance. See the Filtering section for suggested component values where filtering unwanted coupled signals is needed.

configuration information, temperature and voltage measurement results, and status information. These registers are described in Table 3.

POINTER REGISTER

The 8-bit Pointer Register is used to address a given data register. The Pointer Register identifies which of the data registers should respond to a read or write command on the two-wire bus. This register is set

TEMPERATURE MEASUREMENT DATA with every write command. A write command must be

Temperature measurement data may be taken over an operating range of –40°C to +125°C for both local and remote locations.

The Temperature Register of the TMP512/13 is configured as a 13-bit, read-only register that stores the output of the most recent conversion. Two bytes must be read to obtain data, and are described in the

issued to set the proper value in the Pointer Register before executing a read command. Table 3 describes the pointer address of the TMP512/13 registers. The power-on reset (POR) value of the Pointer Register is 00h (0000 0000b).

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V V =-

BE2 BE1

nkT

I I

(

n =

eff

1.008 300

(300 N )-

ADJUST

N 300

ADJUST

300 1.008

eff

(

Power Register

Current Register

Two-Wire Interface

Voltage Register

ADC

GND

GPIO

DXP1

DXN1

DXP2

DXN2

ADC

Low-Pass Filter

MUX

DXP3

DXN3

IN+

IN-

Current

Shunt

Load

Filter C

V+

Subregulator

3.3V

Internal

Diode

Temperature

Sensor

ALERT

SDA

SCL

SMBus

Controller

3.3V Supply

TMP512 TMP513

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SBOS491 –JUNE 2010

n-FACTOR CORRECTION REGISTER twos-complement format, yielding an effective data

The TMP512/13 allow for a different n-factor value to be used for converting remote channel measurements to temperature. The remote channel uses sequential current excitation to extract a differential VBEvoltage measurement to determine the temperature of the remote transistor. Equation 1 describes this voltage and temperature.

(1)

The value n in Equation 1 is a characteristic of the particular transistor used for the remote channel. The power-on reset value for the TMP512/13 is n = 1.008. The value in the n-Factor Correction Register may be used to adjust the effective n-factor according to

Equation 2 and Equation 3.

(2)

(3)

The n-factor value must be stored in Acknowledge and pulling SDA LOW.

range from –128 to +127. The n-factor value may be written to and read from pointer address 16h for remote channel 1, pointer address 17h for remote channel 2, and pointer address 18h for remote channel 3. The register power-on reset value is 00h, thus having no effect unless the register is written to.

BUS OVERVIEW

The device that initiates the transfer is called a

master, and the devices controlled by the master are slaves. The bus must be controlled by a master

device that generates the serial clock (SCL), controls the bus access, and generates START and STOP conditions.

To address a specific device, the master initiates a START condition by pulling the data signal line (SDA) from a HIGH to a LOW logic level while SCL is HIGH. All slaves on the bus shift in the slave address byte on the rising edge of SCL, with the last bit indicating whether a read or write operation is intended. During the ninth clock pulse, the slave being addressed responds to the master by generating an

Figure 21. Typical Application Circuit

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Data transfer is then initiated and eight bits of data WRITING TO/READING FROM THE are sent, followed by an Acknowledge bit. During TMP512/13 data transfer, SDA must remain stable while SCL is HIGH. Any change in SDA while SCL is HIGH is interpreted as a START or STOP condition.

Accessing a particular register on the TMP512/13 is accomplished by writing the appropriate value to the

register pointer. Refer to Table 3 for a complete list of Once all data have been transferred, the master registers and corresponding addresses. The value for generates a STOP condition, indicated by pulling the register pointer as shown in Figure 24 is the first SDA from LOW to HIGH while SCL is HIGH. The byte transferred after the slave address byte with the TMP512/13 includes a 28ms timeout on its interface R/W bit LOW. Every write operation to the to prevent locking up an SMBus. TMP512/13 requires a value for the register pointer.

SERIAL BUS ADDRESS

To communicate with the TMP512/13, the master must first address slave devices via a slave address byte. The slave address byte consists of seven address bits, and a direction bit indicating the intent of executing a read or write operation.

The TMP512/13 feature an address pin to allow up to four devices to be addressed on a single bus. Table 1 describes the pin logic levels used to properly connect up to four devices. The state of the A0 pin is sampled on every bus communication and should be set before any activity on the interface occurs. The address pin is read at the start of each communication event.

Writing to a register begins with the first byte

transmitted by the master. This byte is the slave

address, with the R/W bit LOW. The TMP512/13 then

acknowledge receipt of a valid address. The next

byte transmitted by the master is the address of the

address value updates the register pointer to the

desired register. The next two bytes are written to the

TMP512/13 acknowledge receipt of each data byte.

The master may terminate data transfer by

generating a START or STOP condition.

When reading from the TMP512/13, the last value

stored in the register pointer by a write operation

determines which register is read during a read

operation. To change the register pointer for a read

Table 1. TMP512/13 Address Pins and

operation, a new value must be written to the register

Slave Addresses pointer. This write is accomplished by issuing a slave

DEVICE TWO-WIRE

ADDRESS A0 PIN CONNECTION

1011100 Ground 1011101 V+ 1011110 SDA 1011111 SCL

address byte with the R/W bit LOW, followed by the

The master then generates a START condition and

sends the slave address byte with the R/W bit HIGH

to initiate the read command. The next byte is

transmitted by the slave and is the most significant

byte of the register indicated by the register pointer.

This byte is followed by an Acknowledge from the

SERIAL INTERFACE

master; then the slave transmits the least significant

byte. The master acknowledges receipt of the data The TMP512/13 operate only as slave devices on the byte. The master may terminate data transfer by two-wire bus and SMBus. SCL is an input only, and generating a Not-Acknowledge after receiving any TMP512/13 cannot drive it. Connections to the bus data byte, or generating a START or STOP condition. are made via the open-drain I/O lines SDA and SCL. If repeated reads from the same register are desired, The SDA and SCL pins feature integrated spike it is not necessary to continually send the register suppression filters and Schmitt triggers to minimize pointer bytes; the TMP512/13 retain the register the effects of input spikes and bus noise. The pointer value until it is changed by the next write TMP512/13 support the transmission protocol for fast operation. (1kHz to 400kHz) and high-speed (1kHz to 3.4MHz) modes. All data bytes are transmitted MSB first.

Figure 22 and Figure 23 show read and write

operation timing diagrams, respectively. Note that

followed by the least significant byte. See Figure 25

for an illustration of a typical register pointer

configuration.

Product Folder Link(s): TMP512 TMP513

Frame1Two-WireSlaveAddressByte

(1)

Frame2DataMSByte

(2)

StartBy

Master

ACKBy

TMP512/TMP513

ACKBy

Master

From

TMP512/TMP513

1 9 1

SDA

SCL

0 1 1 R/

W D15 D14 D13 D12 D11 D10 D9 D8

1 A1 A0

Frame3DataLSByte

(2)

StopNoACKBy

(3)

Master

From

TMP512/TMP513

D7 D6 D5 D4 D3 D2 D1 D0

NOTES:(1)ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0pin.

RefertoTable1.

(2)Readdataisfromthelastregisterpointerlocation.Ifanewregisterisdesired,theregister

pointermustbeupdated.SeeFigure23.

(3)ACKbyMastercanalsobesent.

Frame1Two-WireSlaveAddressByte

(1)

Frame2RegisterPointerByte

StartBy

Master

ACKBy

TMP512/TMP513

ACKBy

TMP512/TMP513

1 9 1

ACKBy

TMP512/TMP513

D15 D14 D13 D12 D11 D10 D9 D8

SDA

SCL

1 0 1 1 1

A1 A0 R/W P7 P6 P5 P4 P3 P2 P1 P0

NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0pin.RefertoTable1.

Frame4DataLSByteFrame3DataMSByte

ACKBy

TMP512/TMP513

StopBy

Master

D7 D6 D5 D4 D3 D2 D1 D0

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Figure 22. Timing Diagram for Write Word Format

Product Folder Link(s): TMP512 TMP513

Figure 23. Timing Diagram for Read Word Format

Frame1SMBusALERTResponseAddressByte Frame2SlaveAddressByte

(1)

StartBy

Master

ACKBy

TMP512/TMP513

From

TMP512/TMP513

NACKBy

Master

StopBy

Master

1 9 1

SDA

SCL

ALERT

0 0 0 1 1 0 0 R/

W 1 0 1 1 1 A1 A0

NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0pin.RefertoTable1.

Frame1Two-WireSlaveAddressByte

(1)

Frame2RegisterPointerByte

StartBy

Master

ACKBy

TMP512/TMP513

ACKBy

TMP512/TMP513

1 9 1 9

SDA

SCL

0 1 1 1 A1 A0 R/W P7 P6 P5 P4 P3 P2 P1 P0 Stop

NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0pin.RefertoTable1.

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Figure 24. Timing Diagram for SMBus ALERT

Figure 25. Typical Register Pointer Set

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SCL

SDA

(LOW)

(HDSTA)

(HDDAT)

(BUF)

(SUDAT)

(HIGH)

(SUSTA)

(SUSTO)

P S S P

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TIMING DIAGRAMS Data Transfer: The number of data bytes transferred

Figure 26 describes the timing operations on the

TMP512/13. Parameters for Figure 26 are defined in

Table 2. Bus definitions are:

Bus Idle: Both SDA and SCL lines remain high. Start Data Transfer: A change in the state of the

SDA line, from high to low, while the SCL line is high, defines a START condition. Each data transfer initiates with a START condition. Denoted as S in

Figure 26.

Stop Data Transfer: A change in the state of the SDA line from low to high while the SCL line is high defines a STOP condition. Each data transfer terminates with a repeated START or STOP condition. Denoted as P in Figure 26.

between a START and a STOP condition is not

limited and is determined by the master device. The

receiver acknowledges data transfer.

Acknowledge: Each receiving device, when

addressed, is obliged to generate an Acknowledge

bit. A device that acknowledges must pull down the

SDA line during the Acknowledge clock pulse in such

a way that the SDA line is stable low during the high

period of the Acknowledge clock pulse. Setup and

hold times must be taken into account. On a master

receive, data transfer termination can be signaled by

the master generating a Not-Acknowledge on the last

byte that has been transmitted by the slave.

Figure 26. Two-Wire Timing Diagram

Table 2. Timing Characteristics for Figure 26

FAST MODE HIGH-SPEED MODE

PARAMETER MIN MAX MIN MAX UNIT

SCL Operating Frequency f Bus Free Time Between STOP and START Condition t Hold time after repeated START condition. After this period, the first clock

is generated. Repeated START Condition Setup Time t STOP Condition Setup Time t Data Hold Time t Data Setup Time t SCL Clock LOW Period t SCL Clock HIGH Period t Clock/Data Fall Time t Clock/Data Rise Time t

for SCL ≤ 100kHz t

(SCL) (BUF)

(HDSTA)

(SUSTA) (SUSTO) (HDDAT) (SUDAT)

(LOW)

(HIGH)

(1) For cases with fall time of SCL less than 20ns and/or the rise or fall time of SDA less than 20ns, the hold time should be greater than

20ns.

(2) For cases with a fall time of SCL less than 10ns and/or the rise or fall time of SDA less than 10ns, the hold time should be greater than

10ns.

0.001 0.4 0.001 3.4 MHz 600 160 ns

100 100 ns 100 100 ns

100 100 ns

(1)

0 100 10 ns

1300 160 ns

600 60 ns

F R R

300 160 ns 300 160

1000

(2)

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HIGH-SPEED MODE SENSOR FAULT

In order for the two-wire bus to operate at frequencies The TMP512/13 can sense an open circuit. above 400kHz, the master device must issue a Short-circuit conditions return a value of –256°C. The High-Speed mode (Hs-mode) master code (0000 detection circuitry consists of a voltage comparator 1xxx) as the first byte after a START condition to that trips when the voltage at DXP exceeds (V+) – switch the bus to high-speed operation. The 0.6V (typical). The comparator output is continuously TMP512/13 do not acknowledge this byte, but switch checked during a conversion. If a fault is detected, the input filters on SDA and SCL and the output filter the OPEN bit (bit 0) in the temperature result register on SDA to operate in Hs-mode, allowing transfers at is set to '1' and the rest of the register bits should be up to 3.4MHz. After the Hs-mode master code has ignored. been issued, the master transmits a START condition to a two-wire slave address that initiates a data transfer operation. The bus continues to operate in Hs-mode until a STOP condition occurs on the bus. Upon receiving the STOP condition, the TMP512/13 switch the input and output filters back to Fast mode operation.

POWER-UP CONDITIONS

Power-up conditions apply to a software reset via the RST bit (bit 15) in the Configuration Register, or the two-wire bus General Call Reset. At device power up, all Status bits are masked, and the SMBus Alert function is disabled. All watchdog outputs default to active low and transparent (non-latched) modes.

SHUTDOWN MODE

The TMP512/13 shutdown mode of operation allows the user flexibility to shut down the shunt/bus voltage measurement and the temperature measurement functions individually. TEMPERATURE AVERAGING

When not using the remote sensor with the TMP512/13, the DXP and DXN inputs must be connected together to prevent meaningless fault warnings.

UNDERVOLTAGE LOCKOUT

The TMP512/13 sense when the power-supply voltage has reached a minimum voltage level for the ADC to function. The detection circuitry consists of a voltage comparator that enables the ADC after the power supply (V+) exceeds 2.7V (typical). The comparator output is continuously checked during a conversion. The TMP512/13 do not perform a temperature conversion if the power supply is not valid. The PVLD bit (see Status Register; Local Temperature Reset Register; Remote Temperature Reset 1, 2 and 3 Registers) of the individual Local/Remote Temperature Result Registers are set to '1' and the temperature result may be incorrect.

To shut down the shunt/bus voltage measurement The TMP512/13 average the input diode voltages function immediately, set bits 2 through 0 in that determine the remote temperature by sampling Configuration Register 1 (00h) to '000' respectively. multiple times throughout a conversion. The To shut down the shunt/bus voltage measurement temperature result can be extracted from four after the end of the current conversion, set bits 2 different VBEreadings and is sampled 600 times in through 0 in Configuration Resister 1 (00h) to '100' 130ms (max). Each VBEvoltage is sampled 150 times respectively. through integration capacitors that average the

To shut down the temperature measurement function immediately, set bits 15 through 11 in Configuration Register 2 (01h) to '00000' respectively. To shut down the temperature measurement after the end of the current conversion, set bit 15 in Configuration Register 2 (01h) to '0'.

ONE-SHOT COMMAND

For the TMP512/13, when the temperature core is in shutdown and the voltage core is in triggered mode, a single conversion is started on all enabled channels by writing a '1' to the OS bit in Configuration Register

1. This write operation starts one conversion; the TMP512/13 returns to shutdown mode when that conversion completes. At the end of the conversion, the Conversion Ready flags (bit 6 and bit 5) in the Status Register are set to indicate end of conversion.

results throughout the conversion time. A delta-sigma (ΔΣ) modulator and digital filter integrate the V voltages and create a sync filter averaging system. In addition, a low-pass filter is present at the input of the converter with a cutoff frequency of 65kHz. This integrating topology offers superior noise immunity.

FILTERING

Remote junction temperature sensors are usually implemented in a noisy environment. Noise is frequently generated by fast digital signals and if not filtered properly will induce errors that can corrupt temperature measurements. The TMP512/13 have a built-in 65kHz filter on the inputs of DXP and DXN to minimize the effects of noise. However, a bypass capacitor placed differentially across the inputs of the remote temperature sensor is recommended to make the application more robust against unwanted

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ERR

1.004 1.008

1.008

(

´ °273.15+100 C

)

T =1.48 C

ERR

n 1.008

1.008

(

´ °273.15+T( C)

TMP512 TMP513

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coupled signals. The value of this capacitor should be Where: between 100pF and 1nF. Some applications attain better overall accuracy with additional series resistance; however, this increased accuracy is application-specific. When series resistance is added, the total value should not be greater than 3kΩ. If filtering is needed, suggested component values are 100pF and 50Ω on each input; exact values are application-specific.

n = ideality factor of remote temperature sensor. T(°C) = actual temperature. T Degree delta is the same for °C and K.

For n = 1.004 and T(°C) = 100°C:

GENERAL CALL RESET

The TMP512/13 support reset via the two-wire General Call address 00h (0000 0000b). The TMP512/13 acknowledge the General Call address and respond to the second byte. If the second byte is 06h (0000 0110b), the TMP512/13 execute a software reset state to all TMP512/13 registers, and abort any conversion in progress. The TMP512/13 take no action in response to other values in the second byte.

REMOTE SENSING

The TMP512/13 are designed to be used with either discrete transistors or substrate transistors built into processor chips and ASICs. Either NPN or PNP transistors can be used, as long as the base-emitter junction is used as the remote temperature sense. NPN transistors must be diode-connected. PNP transistors can either be transistor- or diode-connected, as Figure 18 and Figure 19 show.

Errors in remote temperature sensor readings are typically the consequence of the ideality factor and current excitation used by the TMP512/13 versus the manufacturer-specified operating current for a given transistor. Some manufacturers specify a high-level and low-level current for the temperature-sensing substrate transistors. The TMP512/13 use 6mA for I

and 120mA for I

LOW

The ideality factor (n) is a measured characteristic of a remote temperature sensor diode as compared to an ideal diode. The TMP512/13 allow for different n-factor values; see the n-Factor Correction Register section.

The ideality factor for the TMP512/13 is trimmed to be 1.008. For transistors that have an ideality factor that does not match the TMP512/13, Equation 4 can be used to calculate the temperature error. Note that for the equation to be used correctly, actual temperature (°C) must be converted to kelvins (K).

space

HIGH

(4)

If a discrete transistor is used as the remote temperature sensor with the TMP512/13, the best accuracy can be achieved by selecting the transistor according to the following criteria:

1. Base-emitter voltage > 0.25V at 6mA, at the highest sensed temperature.

2. Base-emitter voltage < 0.95V at 120mA, at the lowest sensed temperature.

3. Base resistance < 100Ω.

4. Tight control of VBEcharacteristics indicated by small variations in hFE(that is, 50 to 150).

Based on these criteria, two recommended small-signal transistors are the 2N3904 (NPN) or 2N3906 (PNP).

BASIC ADC FUNCTIONS

The two analog inputs to the TMP512/13, V V

, connect to a shunt resistor in the bus of interest.

IN–

The TMP512/13 are powered by an internal subregulator, which has a typical output of 3.3V. The bus being sensed can vary from 0V to 26V. There are no special considerations for power-supply sequencing (for example, a bus voltage can be present with the supply voltage off, and vice-versa). The TMP512/13 sense the small drop across the shunt for shunt voltage, and sense the voltage with respect to ground from V

Figure 27 for an illustration of this operation.

When the TMP512/13 are in the normal operating mode (that is, MODE bits of Configuration Register 1 are set to '111'), the devices continuously convert the shunt voltage up to the number set in the shunt voltage averaging function (Configuration Register 1, SADC bits). The devices then convert the bus voltage up to the number set in the bus voltage averaging (Configuration Register 1, BADC bits). The Mode control in Configuration Register 1 also permits selecting modes to convert only voltage or current, either continuously or in response to a two-wire command.

SBOS491 –JUNE 2010

= error in TMP512/13 because n ≠ 1.008.

ERR

for the bus voltage. See

IN–

IN+

(5)

and

Product Folder Link(s): TMP512 TMP513

Power Register

Current Register

Two-Wire Interface

Voltage Register

ADC

GPIO

GND

DXP1

DXN1

DXP2

DXN2

ADC

Low-Pass Filter

MUX

DXP3

DXN3

IN+

IN-

Current

Shunt

Load

Filter C

V+

Subregulator

3.3V

Internal

Diode

Temperature

Sensor

ALERT

SDA

SCL

SMBus

Controller

3.3V Supply

TMP512 TMP513

V = V -

SHUNT IN+VIN-

Typically < 50mV

V =

BUS

GND-V

IN-

Range of 0V to 26V

Typical Application: 12V

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Figure 27. TMP512/13 Configured for Shunt and Bus Voltage Measurement

All current and power calculations are performed in the background and do not contribute to conversion time; conversion times shown in the Electrical

Characteristics table can be used to determine the

actual conversion time. Power-Down mode reduces the quiescent current

and turns off current into the TMP512/13 inputs, avoiding any supply drain. Full recovery from Power-Down requires 40ms. ADC Off mode (set by Configuration Register 1, MODE bits) stops all conversions.

Although the TMP512/13 can be read at any time, and the data from the last conversion remain available, the Conversion Ready bit and the Conversion Ready Temperature bit (Status Register, CVR and CRT) are provided to help co-ordinate one-shot or triggered conversions. The Conversion Ready bit and the Conversion Ready Temperature bit are set after all conversions, averaging, and multiplication operations are complete.

The Conversion Ready bit and the Conversion Ready Temperature bit clear when reading the Status Register or triggering a single-shot conversion.

POWER MEASUREMENT

Current and bus voltage are converted at different points in time, depending on the resolution and averaging mode settings. For instance, when configured for 12-bit and 128 sample averaging, up to 81ms in time between sampling these two values is possible. Again, these calculations are performed in the background and do not add to the overall conversion time.

PGA FUNCTION

If larger full-scale shunt voltages are desired, the TMP512/13 provide a PGA function that increases the full-scale range up to 2, 4, or 8 times (320mV). Additionally, the bus voltage measurement has two full-scale ranges: 16V or 32V.

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Power Register

Current Register

Two-Wire

Interface

Voltage Register

ADC

GND GPIO

DXP1

DXN1

DXP2

DXN2

ADC

Low-Pass Filter

MUX

DXP3

DXN3

IN+

IN-

Current

Shunt

Load

Filter C

V+

Subregulator

3.3V

Internal

Diode

Temperature

Sensor

ALERT

SDA

SCL

SMBus

Controller

3.3V Supply

TMP512 TMP513

0.1 F to 1 F Ceramic Capacitor

m m

10W

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COMPATIBILITY WITH TI HOT-SWAP This architecture has good inherent noise rejection; CONTROLLERS however, transients that occur at or very close to the

The TMP512/13 are designed for compatibility with hot-swap controllers such the TI TPS2490. The TPS2490 uses a high-side shunt with a limit at 50mV; the TMP512/13 full-scale range of 40mV enables the use of the same shunt for current sensing below this limit. When sensing is required at (or through) the 50mV sense point of the TPS2490, the PGA of the TMP512/13 can be set to ÷2 to provide an 80mV full-scale range. Overload conditions are another consideration for the

FILTERING AND INPUT CONSIDERATIONS

Measuring current is often noisy, and such noise can be difficult to define. The TMP512/13 offer several options for filtering by choosing resolution and averaging in Configuration Register 1. These filtering options can be set independently for either voltage or current measurement.

The internal ADC is based on a delta-sigma (ΔΣ) front-end with a 500kHz (±10%) typical sampling rate.

sampling rate harmonics can cause problems. Because these signals are at 1MHz and higher, they can be dealt with by incorporating filtering at the input of the TMP512/13. The high frequency enables the use of low-value series resistors on the filter for negligible effects on measurement accuracy.

Figure 28 shows the TMP512/13 with an additional

filter added at the input.

TMP512/13 inputs. The TMP512/13 inputs are specified to tolerate 26V across the inputs. A large differential scenario might be a short to ground on the load side of the shunt. This type of event can result in full power-supply voltage across the shunt (as long the power supply or energy storage capacitors support it). It must be remembered that removing a short to ground can result in inductive kickbacks that could exceed the 26V differential and common-mode rating of the TMP512/13. Inductive kickback voltages are best dealt with by zener-type transient-absorbing devices (commonly called transzorbs) combined with sufficient energy storage capacitance.

Figure 28. TMP512/13 with Input Filtering

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In applications that do not have large energy storage not generate an Acknowledge and continues to hold electrolytics on one or both sides of the shunt, an the ALERT line low until the interrupt is cleared. input overstress condition may result from an Successful completion of the read alert response excessive dV/dt of the voltage applied to the input. A protocol clears the SMBus ALERT pin, provided that hard physical short is the most likely cause of this the condition causing the alert no longer exists. The event, particularly in applications with no large SMBus Alert flag is cleared separately by either electrolytics present. This problem occurs because an reading the Status Register or by disabling the excessive dV/dt can activate the ESD protection in SMBus Alert function. the TMP512/13 in systems where large currents are available. Testing has demonstrated that the addition of 10Ω resistors in series with each input of the TMP512/13 sufficiently protects the inputs against dV/dt failure up to the 26V rating of the TMP512/13. These resistors have no significant effect on accuracy.

SMBus ALERT RESPONSE

The SMBus alert response functions only when the Alert pin is active and in latch mode (03h, bit 0 = 1); see Figure 24. The ALERT interrupt output signal is latched and can be cleared only by either reading the Status Register or by successfully responding to an alert response address. If the fault is still present, the ALERT pin re-asserts. Asserting the ALERT pin does not halt automatic conversions that are already in progress. The ALERT output pin is open-drain, allowing multiple devices to share a common interrupt line.

The TMP512/13 respond to the SMBus alert response address, an interrupt pointer return-address feature. The SMBus alert response interrupt pointer provides quick fault identification for simple slave devices. When an ALERT occurs, the master can broadcast the alert response slave address (0001

100). Following this alert response, any slave devices that generated interrupts identify themselves by putting the respective addresses on the bus.

The alert response can activate several different

The Status Register flags indicate which (if any) of the watchdogs have been activated. After power-on reset (POR), the normal state of all flag bits is '0', assuming that no alarm conditions exist.

EXTERNAL CIRCUITRY FOR ADDITIONAL V

INPUT

BUS

The TMP512/13 GPIO can be used to control an external circuit to switch the V alternate location. Switching is most often done to perform bus voltage measurements on the opposite side of a MOSFET switch in series with the shunt resistor.

Consideration must be given to the typical 20mA input current of each TMP512/13 input, along with the 320kΩ impedance present at the V bus voltage is measured. These effects can create errors through the resistance of any external switching method used. The easiest way to avoid these errors is by reducing this resistance to a minimum; select switching MOSFETs with the lowest possible R

DS(on)

values.

The circuit shown in Figure 29 uses MOSFET pairs to reduce package count. Back-to-back MOSFETs must be used in each leg because of the built-in back diodes from source-to-drain. In this circuit, the normal connection for V

is at the shunt, with the optional

IN–

voltage measurement at the output of the control FET.

measurement to an

BUS

input where the

IN–

slave devices simultaneously, similar to the two-wire General Call. If more than one slave attempts to respond, bus arbitration rules apply; the device with the lower address code wins. The losing device does

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Power Register

Current Register

Two-Wire Interface

Voltage Register

ADC

GND

DXP1

DXN1

DXP2

DXN2

ADC

Low-Pass Filter

MUX

DXP3

DXN3

IN+

IN-

Load

Filter C

V+

Subregulator

3.3V

Internal

Diode

Temperature

Sensor

ALERT

SDA

SCL

SMBus

Controller

3.3V Supply

TMP512 TMP513

Shunt R

SHUNT

10kW

From Hot-Swap Controller

Control

FET

GPIO

N-Channel MOSFETs Dual pairs such as Vishay SI1034

P-Channel MOSFETs Dual pairs such as Vishay SI3991DV

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Figure 29. External Circuitry for Additional V

BUS

Input

Product Folder Link(s): TMP512 TMP513

MaxPossible_I=

SHUNT_MAX

SHUNT

MaxPossible_I=0.64

Minimum_LSB=

Max_Expected_I

32767

Minimum_LSB=18.311 10´

-6

Maximum_LSB =

Max_Expected_I

4095

Maximum_LSB = 146.520 10´

-6

Cal=trunc

0.04096

Current_LSB R´

SHUNT

Cal=4096

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PROGRAMMING THE TMP512/13 POWER MEASUREMENT ENGINE

Calibration Register and Scaling

The Calibration Register makes it possible to set the scaling of the Current and Power Registers to whatever values are most useful for a given application. One strategy may be to set the Calibration Register such that the largest possible number is generated in the Current Register or Power Register at the expected full-scale point; this approach yields the highest resolution. The Calibration Register can also be selected to provide values in the Current and Power Registers that either provide direct decimal equivalents of the values being measured, or yield a round LSB number. After these choices have been made, the Calibration Register also offers possibilities for end user system-level calibration, where the value is adjusted slightly to cancel total system error.

This section presents two examples for configuring the TMP512/13 calibration. Both examples are written so the information relates directly to the calibration setup found in the TMP512/13EVM software.

Calibration Example 1: Calibrating the TMP512/13 with no possibility for overflow.

NOTE

The numbers used in this example are the same used with the TMP512/13EVM software as shown in Figure 30.

1. Establish the following parameters: V

BUS_MAX

SHUNT_MAX

SHUNT

2. Use Equation 6 to determine the maximum possible current .

= 32

= 0.32

= 0.5

(6)

3. Choose the desired maximum current value. This value is selected based on system expectations. Max_Expected_I = 0.6

4. Calculate the possible range of current LSBs. To calculate this range, first compute a range of LSBs that is

appropriate for the design. Next, select an LSB within this range. Note that the results will have the most resolution when the minimum LSB is selected. Typically, an LSB is selected to be the nearest round number to the minimum LSB value.

(7)

(8)

Choose an LSB in the range: Minimum_LSB < Selected_LSB < Maximum_LSB Current_LSB = 20 × 10

–6

Note:

This value was selected to be a round number near the Minimum_LSB. This selection allows for good resolution with a rounded LSB.

5. Compute the Calibration Register value using Equation 9:

(9)

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Power_LSB=20Current_LSB

Power_LSB=400 10´

-6

Max_Current=Current_LSB 32767´

Max_Current=0.65534

Max_ShuntVoltage=Max_Current_Before_Overflow R´

SHUNT

Max_ShuntVoltage=0.32

MaximumPower=Max_Current_Before_Overflow V´

BUS_MAX

MaximumPower=20.48

Corrected_Full_Scale_Cal=trunc

Cal MeasShuntCurrent

TMP513_Current

Corrected_Full_Scale_Cal=3548

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6. Calculate the Power LSB with Equation 10. Equation 10 shows a general formula; because the bus voltage

measurement LSB is always 4mV, the power formula reduces to the calculated result.

(10)

7. Compute the maximum current and shunt voltage values (before overflow), as shown by Equation 11 and

Equation 12. Note that both Equation 11 and Equation 12 involve an If - then condition:

(11)

If Max_Current ≥ MaxPossible_I then

Max_Current_Before_Overflow = MaxPossible_I

Else

Max_Current_Before_Overflow = Max_Current

End If (Note that Max_Current is greater than MaxPossible_I in this example.) Max_Current_Before_Overflow = 0.64

(12)

If Max_ShuntVoltage ≥ V

Max_ShuntVoltage_Before_Overflow = V

SHUNT_MAX

Else

Max_ShuntVoltage_Before_Overflow= Max_ShuntVoltage End If (Note that Max_ShuntVoltage is greater than V

SHUNT_MAX

in this example.)

Max_ShuntVoltage_Before_Overflow = 0.32

8. Compute the maximum power with Equation 13.

9. (Optional second Calibration step.) Compute corrected full-scale calibration value based on measured current.

TMP513_Current = 0.63484 MeaShuntCurrent = 0.55

Figure 30 illustrates how to perform the same procedure discussed in this example using the automated

TMP512/13EVM software. Note that the same numbers used in this nine-step example are used in the software example. Note also that Figure 30 illustrates which results correspond to which step (for example, the information entered in Step 1 is enclosed in a box in Figure 30 and labeled).

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(13)

(14)

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Figure 30. TMP512/513EVM Calibration Software Automatically Computes Calibration Steps 1-9

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MaxPossible_I=

SHUNT_MAX

SHUNT

MaxPossible_I=0.064

Minimum_LSB=

Max_Expected_I

32767

Minimum_LSB=1.831 10´

-6

Maximum_LSB =

Max_Expected_I

4095

Maximum_LSB = 14.652 10´

-6

Cal=trunc

0.04096

Current_LSB R´

SHUNT

Cal=4311

Power_LSB=20Current_LSB

Power_LSB=38 10´

-6

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Calibration Example 2 (Overflow Possible)

This design example uses the nine-step procedure for calibrating the TMP512/13 where overflow is possible.

Figure 31 illustrates how the same procedure is performed using the automated TMP512/13EVN software. The

same numbers used in the nine-step example are used in the software example shown in Figure 31. Note also that Figure 31 illustrates which results correspond to which step (for example, the information entered in Step 1 is circled in Figure 31 and labeled).

1. Establish the following parameters:

BUS_MAX

SHUNT_MAX

SHUNT

2. Determine the maximum possible current using Equation 15:

3. Choose the desired maximum current value: Max_Expected_I, ≤ MaxPossible_I. This value is selected based on system expectations.

Max_Expected_I = 0.06

4. Calculate the possible range of current LSBs. This calculation is done by first computing a range of LSB's that is appropriate for the design. Next, select an LSB withing this range. Note that the results will have the most resolution when the minimum LSB is selected. Typically, an LSB is selected to be the nearest round number to the minimum LSB.

= 32

= 0.32

= 5

(15)

(16)

(17)

Choose an LSB in the range: Minimum_LSB < Selected_LSB < Maximum_LSB Current_LSB = 1.9 × 10

–6

Note:

This value was selected to be a round number near the Minimum_LSB. This section allows for good resolution with a rounded LSB.

5. Compute the calibration register using Equation 18:

(18)

6. Calculate the Power LSB using Equation 19. Equation 19 shows a general formula; because the bus voltage measurement LSB is always 4mV, the power formula reduces to calculate the result.

(19)

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Max_Current=Current_LSB 32767´ Max_Current=0.06226

Max_ShuntVoltage=Max_Current_Before_Overflow R´

SHUNT

Max_ShuntVoltage=0.3113

MaximumPower=Max_Current_Before_Overflow V´

BUS_MAX

MaximumPower=1.992

Corrected_Full_Scale_Cal=trunc

Cal MeasShuntCurrent

TMP513_Current

Corrected_Full_Scale_Cal=3462

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7. Compute the maximum current and shunt voltage values (before overflow), as shown by Equation 20 and

Equation 21. Note that both Equation 20 and Equation 21 involve an If - then condition.

(20)

If Max_Current ≥ MaxPossible_I then

Max_Current_Before_Overflow = MaxPossible_I

Else

Max_Current_Before_Overflow = Max_Current End If (Note that Max_Current is less than MaxPossible_I in this example.) Max_Current_Before_Overflow = 0.06226

(21)

If Max_ShuntVoltage ≥ V

Max_ShuntVoltage_Before_Overflow = V

SHUNT_MAX

Else

Max_ShuntVoltage_Before_Overflow= Max_ShuntVoltage End If (Note that Max_ShuntVoltage is less than V

SHUNT_MAX

in this example.)

Max_ShuntVoltage_Before_Overflow = 0.3113

8. Compute the maximum power with Equation 22.

(22)

9. (Optional second calibration step.) Compute the corrected full-scale calibration value based on measured current.

TMP513_Current = 0.06226 MeaShuntCurrent = 0.05

(23)

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Figure 31. TMP512/513EVM Calibration Software Automatically Computes Calibration Steps 1-9

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REGISTER INFORMATION

The TMP512/13 uses a bank of registers for holding the write command. Therefore, a 4ms delay is configuration settings, measurement results, required between the completion of a write to a given maximum/minimum limits, and status information. register and a subsequent read of that register

Table 3 summarizes the TMP512/13 registers. (without changing the pointer) when using SCL

Table 3. Summary of Register Set

POINTER

ADDRESS POWER-ON RESET

HEX REGISTER NAME FUNCTION BINARY HEX TYPE

00 Configuration Register 1 ADC resolution/averaging, Shunt ADC resolution/averaging, 00111001 10011111 399F R/W

01 Channels enable, Local Channel enable, resistance correction 1011111110000x00 BF80/BF84 R/W

01 Channels enable, Local Channel enable, resistance correction 11111111 10000x00 FF80/FF84 R/W

02 Status Register Contains the alert and conversion ready flags. 00000000 00000000 0000 R 03 Contains masks to enable/disable the alert functions. 00000000 00000000 0000 R/W 04 Shunt Voltage Result Shunt voltage measurement result. 00000000 00000000 0000 R

05 Bus Voltage Result Bus voltage measurement result. 00000000 00000000 0000 R 06 Power Result Power measurement result. 00000000 00000000 0000 R

07 Shunt Current Result 08 Local Temperature Result Contains local temperature measurement result. 00000000 00000000 0000 R 09 Contains remote temperature measurement result. 00000000 00000000 0000 R

0A Contains remote temperature measurement result. 00000000 00000000 0000 R

0C Contains the positive limit for Shunt Voltage. 00000000 00000000 0000 R/W

0D Contains the negative limit for Shunt Voltage. 00000000 00000000 0000 R/W

0E Bus Voltage Positive Limit Contains the positive limit for Bus Voltage. 0000000000000000 0000 R/W 0F Bus Voltage Negative Limit Contains the negative limit for Bus Voltage. 00000000 00000000 0000 R/W 10 Power Limit Contains the positive limit for Power. 00000000 00000000 0000 R/W 11 Local Temperature Limit Contains positive limit for local temperature. 00101010 10000000 2A80 R/W

Configuration Register 2

SMBus Alert Mask/Enable

Control Register

Remote Temperature

(3)

Remote Temperature

Shunt Voltage Positive

Shunt Voltage Negative

TMP512

TMP513

Result 1

Result 2

Result 3

Limit

All-register reset, settings for bus voltage range, PGA Gain, Bus one-shot, Operation Mode.

Settings for Temperature Continuous conversion, Remote enable, Conversion rate bits, and GPIO mode bit and readback.

Contains the value of the current flowing through the shunt

(2)

resistor.

Contains remote temperature measurement result. 00000000 00000000 0000 R

00000000 00000000 0000 R

(1) Type: R = Read-Only, R/W = Read/Write. (2) Current Register defaults to '0' because the Calibration Register defaults to '0', yielding a zero current value until the Calibration Register

is programmed.

(3) For TMP513 only.

(1)

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Table 3. Summary of Register Set (continued)

POINTER

ADDRESS POWER-ON RESET

HEX REGISTER NAME FUNCTION BINARY HEX TYPE

12 Contains positive limit for remote temperature. 00101010 10000000 2A80 R/W

13 Contains positive limit for remote temperature. 00101010 10000000 2A80 R/W

(4)

15 Shunt Calibration Register 00000000 00000000 0000 R/W

16 n-Factor 1 00000000 00000000 0000 R/W 17 n-Factor 2 Contains the N-factor value for Remote Channel 2. 00000000 00000000 0000 R/W

(4)

1E/FE Manufacturer ID Register Contains the Manufacturer ID. 01010101 11111111 55FF R 1F/FF Contains the Device ID. 00100010 11111111 22FF R

1F/FF Contains the Device ID. 00100011 11111111 23FF R

Remote Temperature

Limit 1

Remote Temperature

Limit 2

Remote Temperature

Limit 3

n-Factor 3 Contains the N-factor value for Remote Channel 3. 00000000 00000000 0000 R/W

TMP512 Device ID

TMP513 Device ID

Contains positive limit for remote temperature. 00101010 10000000 2A80 R/W Sets the current that corresponds to a full-scale drop across the

shunt. Contains the N-factor value for Remote Channel 1 and

Hysteresis for temperature limits.

(4) For TMP513 only.

space space

(1)

REGISTER DETAILS

All TMP512/13 registers are 16-bit registers. 16-bit register data are sent in two 8-bit bytes via the two-wire interface.

Configuration Register 1—Shunt Measurement Configuration 00h (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT ONE-

NAME SHOT POR

VALUE

RST: Reset Bit

Bit 15 Setting this bit to '1' generates a system reset that is the same as power-on reset. Resets all registers to default

ONE-SHOT One-Shot Bit

Bit 14 Setting this bit to '1' generates a one-shot command.

BRNG: Bus Voltage Range

Bit 13 0 = 16V FSR

PG: PGA (Shunt Voltage Only)

Bits 12, 11 Sets PGA gain and range. Note that the PGA defaults to ÷8 (320mV range). Table 4 shows the gain and range for

RST BRNG PG1 PG0 BADC4 BADC3 BADC2 BADC1 SADC4 SADC3 SADC2 SADC1 MODE3 MODE2 MODE1

0 0 1 1 1 0 0 1 1 0 0 1 1 1 1 1

Bit Descriptions

values; this bit self-clears.

1 = 32V FSR (default value)

the various product gain settings.

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Table 4. PG Bit Settings

PG1 PG0 GAIN RANGE

0 0 1 ±40mV 0 1 ÷2 ±80mV 1 0 ÷4 ±160mV 1 1 ÷8 ±320mV

(1)

(1) Shaded values are default.

BADC: BADC Bus ADC Resolution/Averaging

Bits 10–7 These bits adjust the Bus ADC resolution (9-, 10-, 11-, or 12-bit) or set the number of samples used when

averaging results for the Bus Voltage Register (05h).

SADC: SADC Shunt ADC Resolution/Averaging

Bits 6–3 These bits adjust the Shunt ADC resolution (9-, 10-, 11-, or 12-bit) or set the number of samples used when

averaging results for the Shunt Voltage Register (04h). BADC (Bus) and SADC (Shunt) ADC resolution/averaging and conversion time settings are shown in Table 5.

Table 5. ADC Settings

ADC4 ADC3 ADC2 ADC1 MODE/SAMPLES CONVERSION TIME

0 X 0 X 0 X 0 X 1 0 0 0 12-bit 665ms 1 0 0 1 2 1.3ms 1 0 1 0 4 2.58ms 1 0 1 1 8 5.13ms 1 1 0 0 16 10.25ms 1 1 0 1 32 20.49ms 1 1 1 0 64 40.97ms 1 1 1 1 128 81.92ms

(2)

0 0 9-bit 105ms 0 1 10-bit 185ms 1 0 11-bit 345ms 1 1 12-bit 665ms

(1)

(1) Shaded values are default. (2) X = Don't care.

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MODE: Operating Mode

Bits 2–0 Selects continuous, triggered, or power-down mode of operation. These bits default to continuous shunt and bus

measurement mode. The mode settings are shown in Table 6.

Table 6. Mode Settings

MODE3 MODE2 MODE1 MODE

0 0 0 Power-Down 0 0 1 Shunt Voltage, Triggered 0 1 0 Bus Voltage, Triggered 0 1 1 Shunt and Bus, Triggered 1 0 0 ADC Off (disabled) 1 0 1 Shunt Voltage, Continuous 1 1 0 Bus Voltage, Continuous 1 1 1 Shunt and Bus, Continuous

(1)

(2)

(3)

(4)

(1) Shaded values are default. (2) Combination '000' stops converter immediately. (3) In triggered modes the converter goes to power down. It can be triggered by a write of '1' to bit 14

(One-Shot) in Configuration Register 1 or by the delay scheme of the temperature sensor core. See

Table 7.

(4) Combination '100' stops the converter at conversion end.

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Configuration Register 2—Temperature Measurement Configuration 01h (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME TMP512

POR 1 0 1 1 1 1 1 1 1 0 0 0 0 X 0 0 VALUE

TMP513 POR 1 1 1 1 1 1 1 1 1 0 0 0 0 X 0 0 VALUE

CONT: Continuous Conversion

Bit 15 0: When all bits 14 to 11 are '0', the temp sensor core goes immediately to shutdown mode. When all bits 14 to 11

REN3: Remote Channel 3 Enable (TMP513 only)

Bit 14 0: Remote channel 3 disabled.

REN2: Remote Channel 2 Enable

Bit 13 0: Remote channel 2 disabled.

REN1: Remote Channel 1 Enable

Bit 12 0: Remote channel 1 disabled.

LEN: Local Temperature Enable

Bit 11 0: Local temperature disabled.

RC: Resistance Correction

Bit 10 0: Resistance correction disabled.

R2, R1, R0: Conversion Rate

Bits 9-7 These bits set the conversion rate as shown in Table 7.

CONT REN3 REN2 REN1 LEN RC R2 R1 R0 — — — — GP GPM1 GPM0

are not '0', the temp sensor core stops when all enabled conversions are done. When this bit is '0', a one-shot command can be triggered by writing a "1" to bit 14 of Configuration Register 1. 1: Continuous temperature conversion mode.

1: Remote channel 3 enabled.

1: Remote channel 2 enabled.

1: Remote channel 1 enabled.

1: Local temperature enabled.

1: Resistance correction enabled.

Table 7. Conversion Rate Settings

(1)

R2 R1 R0 CONVERSIONS/SEC

0 0 0 0.0625 0 0 1 0.125 0 1 0 0.25 0 1 1 0.5 1 0 0 1 1 0 1 2 1 1 0 4 1 1 1 8

(2) (3)

(1) Shaded values are default. (2) Conversion rate shown is for only one or two enabled measurement channels. When three channels

are enabled, the conversion rate is 2 and 2/3 conversions per second. When four channels are enabled, the conversion rate is 2 per second.

(3) Conversion rate shown is for only one enabled measurement channel. When two channels are

enabled, the conversion rate is 4 conversions per second. When three channels are enabled, the conversion rate is 2 and 2/3 conversions per second.

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When all of the following conditions are met, the temperature sensor core triggers a single conversion of the voltage measurement core at the same rate as the conversion rate shown by bits R2 to R0.

• The conversion rate is different than '111';

• There is at least one enabled temperature channel; and

• The voltage measurement core is in triggered mode of operation. The temperature sensor core triggers a single conversion of the ADC core at the same rate as the conversion

rate shown by R2 to R0.

GP: GPIO Read-Back

Bit 2 Shows the state of the GPIO pin.

GPM: GPIO Mode

Bits 1-0 The GPIO mode settings are shown in Table 8. GPIO should not be left floating at start-up.

Table 8. GPIO Mode Settings

GPM[1] GPM[0] GPIO PIN DESCRIPTION

0 0 Hi-Z 0 1 Hi-Z 1 0 0 Use to output 0 to GPIO pin 1 1 1 Use to output 1 to GPIO pin

(1) Shaded values are default.

(1)

Use as an input for either of these

modes.

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Status Register 02h (Read)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

SHP SHN BVP BVN PWR LCL RM1 RM2 RM3 CVR CRT PVLD SMBA OVF — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

The Status Register flags activate whenever any limit is violated, and latch if the alert is in latch mode. In latch mode, these flags are cleared when the Status Register is read (if the limit is exceeded, then at next conversion end, the flag sets again). In transparent mode, these flags are cleared when any corresponding limit is not violated any longer.

After power-up and initial setup, the Status Register should be read once to clear any flags set as a result of power-up values prior to setup.

Bit Descriptions

SHP: Shunt Positive Over-Voltage

Bit 15 This bit is set to '1' when the result in the Shunt Voltage Register (04h) exceeds the level set in the Shunt Positive

SHN: Shunt Negative Under-Voltage

Bit 14 This bit is set to '1' when the result in the Shunt Voltage Register (04h) goes below the level set in the Shunt

BVP: Bus Positive Over-Voltage

Bit 13 This bit is set to '1' when the result in the Bus Voltage Register (05h) exceeds the level set in the Bus Voltage

BVN: Bus Negative Under-Voltage

Bit 12 This bit is set to '1' when the result in the Bus Voltage Register (05h) goes below the level set in the Bus Voltage

PWR: Power Over–Limit

Bit 11 This bit is set to '1' when the result in the Power Register (06h) exceeds the level set in the Power Limit Register

LCL: Local Temperature Over-Limit

Bit 10 This bit is set to '1' when the result in the Local Temperature Result Register (08h) exceeds the level set in the

RM1: Remote Temperature 1 Over-Limit

Bit 9 This bit is set to '1' when the result in the Remote Temperature Result 1 Register (09h) exceeds the level set in the

RM2: Remote Temperature 2 Over-Limit

Bit 8 This bit is set to '1' when the result in the Remote Temperature Result 2 Register (0Ah) exceeds the level set in the

Limit Register (0Ch).

Negative Limit Register (0Dh).

Positive Limit Register (0Eh).

Negative Limit Register (0Fh).

(10h).

Local Temperature Limit Register (11h) plus half of the temperature hysteresis. It clears in transparent mode when the result in the Local Temperature Result Register (08h) is below the level set in the Local Temperature Limit Register (11h) minus half of the temperature hysteresis.

Remote Temperature Limit 1 Register (12h) plus half of the temperature hysteresis. It also sets if, during conversion of remote channel 1, an open diode condition was detected. It clears in transparent mode when the result in the Remote Temperature Result 1 Register (09h) is below the level set in the Remote Temperature Limit 1 Register (12h) minus half of the temperature hysteresis, and the last conversion of channel 1 was done without open-diode detection.

Remote Temperature Limit 2 Register (13h) plus half of the temperature hysteresis. It also sets if, during conversion of remote channel 2, an open diode condition was detected. It clears in transparent mode when the result in the Remote Temperature Result 2 Register (0Ah) is below the level set in the Remote Temperature Limit 2 Register (13h) minus half of the temperature hysteresis, and the last conversion of channel 2 was done without open-diode detection.

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Bit Descriptions (continued)

RM3: Remote Temperature 3 Over-Limit (TMP513 only)

Bit 7 This bit is set to '1' when the result in the Remote Temperature Result 3 Register (0Bh) exceeds the level set in the

CVR: Conversion Ready

Bit 6 The Conversion Ready line is provided to help coordinate one-shot conversions for shunt voltage, bus voltage,

CRT: Conversion Ready Temperature

Bit 5 The Conversion Ready Temperature line is provided to help coordinate one-shot conversions for local and remote

PVLD: Power Valid Error

Bit 4 In latch mode, this bit is set to '1' when the brown-out detect fires during a conversion. The flag sets to '1' at the

SMBA: SMBus Alert

Bit 3 This bit is set when the Alert pin is active. When in latch mode, it clears only on reading the Status Register,

OVF: Math Overflow

Bit 2 This bit is set to '1' if an arithmetic operation resulted in an overflow error. It indicates that current and power data

Remote Temperature Limit 3 Register (14h) plus half of the temperature hysteresis. It sets also if during conversion of remote channel 3 an open diode condition was detected. It clears in transparent mode when the result in the Remote Temperature Result 3Register (0Bh) is below the level set in the Remote Temperature Limit 3 Register (14h) minus half of the temperature hysteresis and the last conversion of channel 3 was done without open-diode detection.

current and power measurements. The Conversion bit is set after all conversions, averaging, and multiplication events are complete. Conversion Ready clears under the following conditions:

1. Writing to the One-Shot bit in Configuration Register 1.

2. Reading the Status Register.

temperature measurements. The Conversion bit is set after all enabled channels complete the respective conversions. Conversion Ready Temperature clears under the following conditions:

1. Writing to the One-Shot bit in Configuration Register 1.

2. Reading the Status Register.

conversion end. It clears by reading the Status Register.

disabling the SMBus Alert function, or using SMBus Alert Response. In transparent mode, it clears when the triggering condition is not present.

may be meaningless. It does not set the Alert pin.

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SMBus Alert Register—Mask and Alert Control Functions 03h (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

SHPM SHNM BVPM BVNM PWRM LCLM R1M R2M R3M CVRM CRTM PVLM FC1 FC0 POL LATCH

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Bits D4–D15 of the SMBus Alert Register mask correspond to bits D4 to D15 of the Status Register to prevent them from initiating an SMBus Alert. It does not prevent the Status Register bit from setting. Writing a '0' to an SMBus Alert Mask bit masks it from activating the SMBus Alert. All default values are '0'.

Bit Descriptions

SHPM: Shunt Positive Over-Voltage Mask

Bit 15 0: SHP flag in Status Register cannot activate Alert pin.

1: SHP flag (when set to '1') in Status Register activates Alert pin.

SHNM: Shunt Negative Under-Voltage Mask

Bit 14 0: SHN flag in Status Register cannot activate Alert pin.

1: SHN flag (when set to '1') in Status Register activates Alert pin.

BVPM: Bus Voltage Positive Over-Voltage Mask

Bit 13 0: BVP flag in Status Register cannot activate Alert pin.

1: BVP flag (when set to '1') in Status Register activates Alert pin.

BVNM: Bus Voltage Negative Under-Voltage Mask

Bit 12 0: BVN flag in Status Register cannot activate Alert pin.

1: BVN flag (when set to '1') in Status Register activates Alert pin.

PWRM: Power Over-Limit Mask

Bit 11 0: PWR flag in Status Register cannot activate Alert pin.

1: PWR flag (when set to '1') in Status Register activates Alert pin.

LCLM: Local Temperature Over-Limit Mask

Bit 10 0: LCL flag in Status Register cannot activate Alert pin.

1: LCL flag (when set to '1') in Status Register activates Alert pin.

R1M: Remote Temperature1 Over-Limit Mask

Bit 9 0: RM1 flag in Status Register cannot activate Alert pin.

1: RM1 flag (when set to '1') in Status Register activates Alert pin.

R2M: Remote Temperature2 Over-Limit Mask

Bit 8 0: RM2 flag in Status Register cannot activate Alert pin.

1: RM2 flag (when set to '1') in Status Register activates Alert pin.

R3M: Remote Temperature3 Over-Limit Mask (TMP513 only)

Bit 7 0: RM3 flag in Status Register cannot activate Alert pin.

1: RM3 flag (when set to '1') in Status Register activates Alert pin.

CVRM: Conversion Ready Mask

Bit 6 0: CVR flag in Status Register cannot activate Alert pin.

1: CVR flag (when set to '1') in Status Register activates Alert pin.

CRTM: Conversion Ready Temperature Mask

Bit 5 0: CRT flag in Status Register cannot activate Alert pin.

1: CRT flag (when set to '1') in Status Register activates Alert pin.

PVLM: Power Valid Limit Mask

Bit 4 0: PVLD flag in Status Register cannot activate Alert pin.

1: PVLD flag (when set to '1') in Status Register activates Alert pin.

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Bit Descriptions (continued)

FC0, FC1 Fault Count Control Bits

The Fault Count Control Bits affect flags in SMBus Alert Register bits D15-D7.

Bit 3, 2 00: These flags are activated after the first conversion result with a violated limit.

01: These flags are activated after the second consecutive conversion result with a violated limit. 10: These flags are activated after the fourth consecutive conversion result with a violated limit. 11: These flags are activated after the eighth consecutive conversion result with a violated limit.

POL: Alert Polarity

Bit 1 0: Alert pin is active low.

1: Alert pin is active high.

LATCH: Alert Mode of Operation

Bit 0 0: Alert pin works in transparent mode. The SMB alert response function does not function. Alert is deasserted

when the triggering condition goes away. 1: Alert pin works in latch mode. The SMB alert response function functions when Alert pin is active. Alert will

remain asserted even if the triggering condition goes away. Alert can be deasserted by reading the Status register (02h), using the SMBus Alert response function, resetting the part, or by disabling the alert function using the mask bits.

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Shunt Voltage Register 04h (Read-Only)

The Shunt Voltage Register stores the current shunt voltage reading, V

. Shunt Voltage Register bits are

SHUNT

shifted according to the PGA setting selected in Configuration Register 1 (00h). When multiple sign bits are present, they will all be the same value. Negative numbers are represented in twos complement format. Generate the twos complement of a negative number by complementing the absolute value binary number and adding 1. Extend the sign, denoting a negative number by setting the MSB = '1'. Extend the sign to any additional sign bits to form the 16-bit word.

Example: For a value of V

SHUNT

= –320mV:

1. Take the absolute value (include accuracy to 0.01mV)==> 320.00

2. Translate this number to a whole decimal number ==> 32000

3. Convert it to binary==> 111 1101 0000 0000

4. Complement the binary result : 000 0010 1111 1111

5. Add 1 to the Complement to create the twos complement formatted result ==> 000 0011 0000 0000

6. Extend the sign and create the 16-bit word: 1000 0011 0000 0000 = 8300h (Remember to extend the sign to all sign-bits, as necessary based on the PGA setting.)

At PGA = ÷8, full-scale range = ±320mV (decimal = 32000, positive value hex = 7D00, negative value hex =

8300), and LSB = 10mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

SIGN SD14_8 SD13_8 SD12_8 SD11_8 SD10_8 SD9_8 SD8_8 SD7_8 SD6_8 SD5_8 SD4_8 SD3_8 SD2_8 SD1_8 SD0_8

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

At PGA = ÷4, full-scale range = ±160mV (decimal = 16000, positive value hex = 3E80, negative value hex = C180), and LSB = 10mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

SIGN SIGN SD13_4 SD12_4 SD11_4 SD10_4 SD9_4 SD8_4 SD7_4 SD6_4 SD5_4 SD4_4 SD3_4 SD2_4 SD1_4 SD0_4

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

At PGA = ÷2, full-scale range = ±80mV (decimal = 8000, positive value hex = 1F40, negative value hex = E0C0), and LSB = 10mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

SIGN SIGN SIGN SD12_2 SD11_2 SD10_2 SD9_2 SD8_2 SD7_2 SD6_2 SD5_2 SD4_2 SD3_2 SD2_2 SD1_2 SD0_2

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

At PGA = ÷1, full-scale range = ±40mV (decimal = 4000, positive value hex = 0FA0, negative value hex = F060), and LSB = 10mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

SIGN SIGN SIGN SIGN SD11_1 SD10_1 SD9_1 SD8_1 SD7_1 SD6_1 SD5_1 SD4_1 SD3_1 SD2_1 SD1_1 SD0_1

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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Table 9. Shunt Voltage Register Format

SHUNT

Reading (mV) Value (D15…..................D0) (D15…..................D0) (D15…..................D0) (D15…..................D0)

320.02 32002 0111 1101 0000 0000 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

320.01 32001 0111 1101 0000 0000 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

320.00 32000 0111 1101 0000 0000 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

319.99 31999 0111 1100 1111 1111 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

319.98 31998 0111 1100 1111 1110 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

160.02 16002 0011 1110 1000 0010 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

160.01 16001 0011 1110 1000 0001 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

160.00 16000 0011 1110 1000 0000 0011 1110 1000 0000 0001 1111 0100 0000 0000 1111 1010 0000

159.99 15999 0011 1110 0111 1111 0011 1110 0111 1111 0001 1111 0100 0000 0000 1111 1010 0000

159.98 15998 0011 1110 0111 1110 0011 1110 0111 1110 0001 1111 0100 0000 0000 1111 1010 0000

80.02 8002 0001 1111 0100 0010 0001 1111 0100 0010 0001 1111 0100 0000 0000 1111 1010 0000

80.01 8001 0001 1111 0100 0001 0001 1111 0100 0001 0001 1111 0100 0000 0000 1111 1010 0000

80.00 8000 0001 1111 0100 0000 0001 1111 0100 0000 0001 1111 0100 0000 0000 1111 1010 0000

79.99 7999 0001 1111 0011 1111 0001 1111 0011 1111 0001 1111 0011 1111 0000 1111 1010 0000

79.98 7998 0001 1111 0011 1110 0001 1111 0011 1110 0001 1111 0011 1110 0000 1111 1010 0000

40.02 4002 0000 1111 1010 0010 0000 1111 1010 0010 0000 1111 1010 0010 0000 1111 1010 0000

40.01 4001 0000 1111 1010 0001 0000 1111 1010 0001 0000 1111 1010 0001 0000 1111 1010 0000

40.00 4000 0000 1111 1010 0000 0000 1111 1010 0000 0000 1111 1010 0000 0000 1111 1010 0000

39.99 3999 0000 1111 1001 1111 0000 1111 1001 1111 0000 1111 1001 1111 0000 1111 1001 1111

39.98 3998 0000 1111 1001 1110 0000 1111 1001 1110 0000 1111 1001 1110 0000 1111 1001 1110

Decimal PGA = ÷ 8 PGA = ÷ 4 PGA = ÷ 2 PGA = ÷ 1

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0.02 2 0000 0000 0000 0010 0000 0000 0000 0010 0000 0000 0000 0010 0000 0000 0000 0010

0.01 1 0000 0000 0000 0001 0000 0000 0000 0001 0000 0000 0000 0001 0000 0000 0000 0001 0 0 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000

–0.01 –1 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 –0.02 –2 1111 1111 1111 1110 1111 1111 1111 1110 1111 1111 1111 1110 1111 1111 1111 1110

–39.98 –3998 1111 0000 0110 0010 1111 0000 0110 0010 1111 0000 0110 0010 1111 0000 0110 0010 –39.99 –3999 1111 0000 0110 0001 1111 0000 0110 0001 1111 0000 0110 0001 1111 0000 0110 0001 –40.00 –4000 1111 0000 0110 0000 1111 0000 0110 0000 1111 0000 0110 0000 1111 0000 0110 0000 –40.01 –4001 1111 0000 0101 1111 1111 0000 0101 1111 1111 0000 0101 1111 1111 0000 0110 0000 –40.02 –4002 1111 0000 0101 1110 1111 0000 0101 1110 1111 0000 0101 1110 1111 0000 0110 0000

–79.98 –7998 1110 0000 1100 0010 1110 0000 1100 0010 1110 0000 1100 0010 1111 0000 0110 0000 –79.99 –7999 1110 0000 1100 0001 1110 0000 1100 0001 1110 0000 1100 0001 1111 0000 0110 0000 –80.00 –8000 1110 0000 1100 0000 1110 0000 1100 0000 1110 0000 1100 0000 1111 0000 0110 0000 –80.01 –8001 1110 0000 1011 1111 1110 0000 1011 1111 1110 0000 1100 0000 1111 0000 0110 0000 –80.02 –8002 1110 0000 1011 1110 1110 0000 1011 1110 1110 0000 1100 0000 1111 0000 0110 0000

–159.98 –15998 1100 0001 1000 0010 1100 0001 1000 0010 1110 0000 1100 0000 1111 0000 0110 0000 –159.99 –15999 1100 0001 1000 0001 1100 0001 1000 0001 1110 0000 1100 0000 1111 0000 0110 0000 –160.00 –16000 1100 0001 1000 0000 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000 –160.01 –16001 1100 0001 0111 1111 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000 –160.02 –16002 1100 0001 0111 1110 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000

–319.98 –31998 1000 0011 0000 0010 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000 –319.99 –31999 1000 0011 0000 0001 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000 –320.00 –32000 1000 0011 0000 0000 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000 –320.01 –32001 1000 0011 0000 0000 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000 –320.02 –32002 1000 0011 0000 0000 1100 0001 1000 0000 1110 0000 1100 0000 1111 0000 0110 0000

(1) Out-of-range values are shaded.

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Current BusVoltage´

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Current=

ShuntVoltage CalibrationRegister´

4096

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Bus Voltage Register 05h (Read-Only)

The Bus Voltage Register stores the most recent bus voltage reading, V

BUS

At full-scale range = 32V (decimal = 8000, hex = 1F40), and LSB = 4mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

BD12 BD11 BD10 BD9 BD8 BD7 BD6 BD5 BD4 BD3 BD2 BD1 BD0 — — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

At full-scale range = 16V (decimal = 4000, hex = 0FA0), and LSB = 4mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

0 BD11 BD10 BD9 BD8 BD7 BD6 BD5 BD4 BD3 BD2 BD1 BD0 — — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Power Register 06h (Read-Only)

Full-scale range and LSB are set by the Calibration Register. See the Programming the TMP512/13 Power

Measurement Engine section.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

PD15 PD14 PD13 PD12 PD11 PD10 PD9 PD8 PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

The Power Register records power in watts by multiplying the values of the current with the value of the bus voltage according to the equation:

Current Register 07h (Read-Only)

Full-scale range and LSB depend on the value entered in the Calibration Register. See the Programming the

TMP512/13 Power Measurement Engine section. Negative values are stored in twos complement format.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

CSIGN CD14 CD13 CD12 CD11 CD10 CD9 CD8 CD7 CD6 CD5 CD4 CD3 CD2 CD1 CD0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

The value of the Current Register is calculated by multiplying the value in the Shunt Voltage Register with the value in the Calibration Register according to the equation:

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Local Temperature Result Register 08h (Read-Only)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

T12 T11 T10 T9 T8 T7 T6 T5 T4 T3 T2 T1 T0 — PVLD —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

The data format is 13 bits, 0.0625°C per bit. Full-scale allows display up to ±256°C.

T12–T0: Temperature Result

Bits 15-3 Shows the temperature result according to the format shown in Table 10.

Table 10. 13-Bit Temperature Data Format

TEMPERATURE (°C) DIGITAL OUTPUT (BINARY) HEX

150 0 1001 0110 0000 0960 128 0 1000 0000 0000 0800

127.9375 0 0111 1111 1111 07FF 100 0 0110 0100 0000 0640

80 0 0101 0000 0000 0500 75 0 0100 1011 0000 04B0 50 0 0011 0010 0000 0320 25 0 0001 1001 0000 0190

0.25 0 0000 0000 0100 0004 0 0 0000 0000 0000 0000

–0.25 1 1111 1111 1100 1FFC

–25 1 1110 0111 0000 1E70 –55 1 1100 1001 0000 1C90

For positive temperatures (for example, +50°C): Twos complement is not performed on positive numbers. Therefore, simply convert the number to binary code

with the 13-bit, left-justified format, and MSB = 0 to denote a positive sign. Example: (+50°C)/(0.0625°C/count) = 800 = 320h = 0011 0010 0000 For negative temperatures (for example, –25°C): Generate the twos complement of a negative number by complementing the absolute value binary number and

adding 1. Denote a negative number with MSB = 1. Example: (–25°C)/(0.0625°C/count) = 400 = 190h = 0001 1001 0000 Twos complement format: 1110 0110 1111 + 1 = 1110 0111 0000

PVLD Power Valid Flag

Bit 1 This bit is the power valid flag.

The TMP512/13 do not start a temperature conversion if the power supply is not valid. If the voltage is less than

2.7V during a conversion, the PVLD bit is set to '1' and the temperature result may be incorrect.

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Remote Temperature Result 1 Register 09h, Remote Temperature Result 2 Register 0Ah, Remote Temperature Result 3 Register (TMP513 Only) 0Bh (Read-Only)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

RT12 RT11 RT10 RT9 RT8 RT7 RT6 RT5 RT4 RT3 RT2 RT1 RT0 — PVLD DO

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

The data format is 13 bits, 0.0625°C per bit. Full-scale allows display up to ±256°C.

RT12–RT0: Remote Temperature Result

Bits 3-15 Shows the remote temperature measurement result.

PVLD Power Valid Flag

Bit 1 This bit is the power valid flag.

The TMP512/13 do not start a temperature conversion if the power supply is not valid. If the voltage is less than

2.7V during a conversion, the PVLD bit is set to '1' and the temperature result may be incorrect.

DO Diode Open Flag

Bit 0 This bit is the diode open flag.

If the Remote Channels are open during a conversion, then Diode Open bit is set at the end of the conversion.

Shunt Positive Limit Register 0Ch (Read/Write)

At full-scale range = ±320mV, 15-bit + sign, LSB = 10mV (decimal = 32000, positive value hex = 7D00, negative value hex = 8300).

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT SWP

NAME SIGN POR

VALUE

SWP14 SWP13 SWP12 SWP11 SWP10 SWP9 SWP8 SWP7 SWP6 SWP5 SWP4 SWP3 SWP2 SWP1 SWP0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Shunt Negative Limit Register 0Dh (Read/Write)

At full-scale range = ±320mV (decimal = 32000, positive value hex = 7D00, negative value hex = 8300). 15 bit + sign, LSB = 10mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT SWN

NAME SIGN POR

VALUE

SWN14 SWN13 SWN12 SWN11 SWN10 SWN9 SWN8 SWN7 SWN6 SWN5 SWN4 SWN3 SWN2 SWN1 SWN0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Bus Voltage Positive Limit Register 0Eh (Read/Write)

At full-scale range = 32V (decimal = 8000, hex = 1F40), and LSB = 4mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

BWU12 BWU11 BWU10 BWU9 BWU8 BWU7 BWU6 BWU5 BWU4 BWU3 BWU2 BWU1 BWU0 — — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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Bus Voltage Negative Limit Register 0Fh (Read/Write)

At full-scale range = 32V (decimal = 8000, hex = 1F40), and LSB = 4mV.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

BUO12 BUO11 BUO10 BUO9 BUO8 BUO7 BUO6 BUO5 BUO4 BUO3 BUO2 BUO1 BUO0 — — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Power Limit Register 10h (Read/Write)

At full-scale range, same as the Power Register (06h).

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

PW15 PW14 PW13 PW12 PW11 PW10 PW9 PW8 PW7 PW6 PW5 PW4 PW3 PW2 PW1 PW0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Local Temperature Limit Register 11h, Remote Temperature Limit 1 Register 12h, Remote Temperature Limit 2 Register 13h, Remote Temperature Limit 3 Register 14h (TMP513 Only) (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

TH12 TH11 TH10 TH9 TH8 TH7 TH6 TH5 TH4 TH3 TH2 TH1 TH0 — — —

0 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0

The data format is 13 bits.

TH12–TH0: Temperature Limit

Bits 15-3 Shows the temperature limit.

Shunt Calibration Register 15h (Read/Write)

Current and power calibration are set in the Calibration Register. Note that bit D0 is not used in the calculation. This register sets the current that corresponds to a full-scale drop across the shunt. Full-scale range and the LSB of the current and power measurement depend on the value entered in this register. See the Programming the

TMP512/13 Power Measurement Engine section. This register is suitable for use in overall system calibration.

Note that the '0' POR values are all default.

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

FS15 FS14 FS13 FS12 FS11 FS10 FS9 FS8 FS7 FS6 FS5 FS4 FS3 FS2 FS1 FS0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

(1) D0 is a void bit and is always '0'. It is not possible to write a '1' to D0.

(1)

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n-Factor 1 Register 16h (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

NF7–NF0: n-Factor Bits

Bits 15-8 Shows the n-factor for Channel 1 according to the range indicated in Table 11.

NF7 NF6 NF5 NF4 NF3 NF2 NF1 NF0 HST7 HST6 HST5 HST4 HST3 HST2 HST1 HST0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Table 11. n-Factor Range

ADJUST

BINARY HEX DECIMAL n

0111 1111 7F 127 1.747977 0000 1010 0A 10 1.042759 0000 1000 08 8 1.035616 0000 0110 06 6 1.028571 0000 0100 04 4 1.021622 0000 0010 02 2 1.014765 0000 0001 01 1 1.011371 0000 0000 00 0 1.008 1111 1111 FF –1 1.004651 1111 1110 FE –2 1.001325 1111 1100 FC –4 0.994737 1111 1010 FA –6 0.988235 1111 1000 F8 –8 0.981818 1111 0110 F6 –10 0.975484 1000 0000 80 –128 0.706542

(1)

(1) Shaded values are default.

HST7–HST0: Hysteresis Register Bits

Bits 7-0 The hysteresis register is binary coded. 1LSB is equal to 0.5°C, so the possible hysteresis range is 0°C to 127.5°C.

n-Factor 2 Register 17h (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

NF7 NF6 NF5 NF4 NF3 NF2 NF1 NF0 — — — — — — — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

NF7–NF0: n-Factor Bits

Bits 15-8 Shows the n-factor for Channel 2 according to the range indicated in Table 11.

n-Factor 3 Register 18h (TMP513 Only) (Read/Write)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

NF7–NF0: n-Factor Bits

Bits 15-8 Shows the n-factor for Channel 3 according to the range indicated in Table 11.

NF7 NF6 NF5 NF4 NF3 NF2 NF1 NF0 — — — — — — — —

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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Manufacturer ID Register 1Eh and FEh (Read-Only)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME POR

VALUE

ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 — — — — — — — —

0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1

ID7–ID0: Identification Register Bits

Bits 15-8 These bits provide the manufacturer ID.

Device ID Register 1Fh and FFh (Read-Only)

BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BIT

NAME TMP512

POR 0 0 1 0 0 0 1 0 1 1 1 1 1 1 1 1 VALUE

TMP513 POR 0 0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 VALUE

DID7–DID0: Identification Register Bits

Bits 15-8 These bits provide the device ID.

DID7 DID6 DID5 DID4 DID3 DID2 DID1 DID0 — — — — — — — —

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PACKAGING INFORMATION

Orderable Device

TMP512AID ACTIVE SOIC D 14 50 Green (RoHS

TMP512AIDR ACTIVE SOIC D 14 2500 Green (RoHS

TMP513AID ACTIVE SOIC D 16 40 Green (RoHS

TMP513AIDR ACTIVE SOIC D 16 2500 Green (RoHS

(1)

The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.

Status

(1)

Package Type Package

Drawing

Pins Package Qty

Eco Plan

& no Sb/Br)

(2)

Lead/

Ball Finish

CU NIPDAU Level-2-260C-1 YEAR Purchase Samples

CU NIPDAU Level-2-260C-1 YEAR Request Free Samples

CU NIPDAU Level-2-260C-1 YEAR Purchase Samples

CU NIPDAU Level-2-260C-1 YEAR Request Free Samples

MSL Peak Temp

(3)

Samples

(Requires Login)

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com 20-Jul-2010

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device Package

Type

TMP512AIDR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1

Package Drawing

Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

(mm)B0(mm)K0(mm)P1(mm)W(mm)

Pin1

Quadrant

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com 20-Jul-2010

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

TMP512AIDR SOIC D 14 2500 346.0 346.0 33.0

Pack Materials-Page 2

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TEXAS INSTRUMENTS TMP512, TMP513 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

APPLICATIONS

DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

THERMAL INFORMATION

ELECTRICAL CHARACTERISTICS: V+ = +12V

TMP512

PIN CONFIGURATIONS

TMP513

TYPICAL CHARACTERISTICS: V+ = +12V

PARAMETRIC MEASUREMENT INFORMATION

TYPICAL CONNECTIONS

Subregulator

APPLICATION INFORMATION

DESCRIPTION

SERIES RESISTANCE CANCELLATION Local Temperature Result Register and the Remote

REGISTER INFORMATION

DIFFERENTIAL INPUT CAPACITANCE The TMP512/13 contain multiple registers for holding

POINTER REGISTER

TEMPERATURE MEASUREMENT DATA with every write command. A write command must be

n-FACTOR CORRECTION REGISTER twos-complement format, yielding an effective data

BUS OVERVIEW

SERIAL BUS ADDRESS

SERIAL INTERFACE

TIMING DIAGRAMS Data Transfer: The number of data bytes transferred

HIGH-SPEED MODE SENSOR FAULT

POWER-UP CONDITIONS

SHUTDOWN MODE

The TMP512/13 shutdown mode of operation allows the user flexibility to shut down the shunt/bus voltage measurement and the temperature measurement functions individually. TEMPERATURE AVERAGING

UNDERVOLTAGE LOCKOUT

ONE-SHOT COMMAND

FILTERING

GENERAL CALL RESET

REMOTE SENSING

BASIC ADC FUNCTIONS

POWER MEASUREMENT

PGA FUNCTION

FILTERING AND INPUT CONSIDERATIONS

SMBus ALERT RESPONSE

PROGRAMMING THE TMP512/13 POWER MEASUREMENT ENGINE

Calibration Register and Scaling

Calibration Example 1: Calibrating the TMP512/13 with no possibility for overflow.

Calibration Example 2 (Overflow Possible)

REGISTER INFORMATION

REGISTER DETAILS

Shunt Voltage Register 04h (Read-Only)

Bus Voltage Register 05h (Read-Only)

Power Register 06h (Read-Only)

Current Register 07h (Read-Only)

Local Temperature Result Register 08h (Read-Only)

Remote Temperature Result 1 Register 09h, Remote Temperature Result 2 Register 0Ah, Remote Temperature Result 3 Register (TMP513 Only) 0Bh (Read-Only)

Shunt Positive Limit Register 0Ch (Read/Write)

Shunt Negative Limit Register 0Dh (Read/Write)

Bus Voltage Positive Limit Register 0Eh (Read/Write)

Bus Voltage Negative Limit Register 0Fh (Read/Write)

Power Limit Register 10h (Read/Write)

Local Temperature Limit Register 11h, Remote Temperature Limit 1 Register 12h, Remote Temperature Limit 2 Register 13h, Remote Temperature Limit 3 Register 14h (TMP513 Only) (Read/Write)

Shunt Calibration Register 15h (Read/Write)

n-Factor 1 Register 16h (Read/Write)

n-Factor 2 Register 17h (Read/Write)

n-Factor 3 Register 18h (TMP513 Only) (Read/Write)

Manufacturer ID Register 1Eh and FEh (Read-Only)

Device ID Register 1Fh and FFh (Read-Only)