ANALOG DEVICES TMP05 Service Manual

±0.5°C Accurate PWM

FEATURES

Modulated serial digital output, proportional to

temperature ±0.5°C typical accuracy at 25°C ±1.0°C accuracy from 0°C to 70°C Two grades available Operation from −40°C to +150°C Operation from 3 V to 5.5 V Power consumption 70 μW maximum at 3.3 V CMOS-/TTL-compatible output on TMP05 Flexible open-drain output on TMP06 Small, low cost, 5-lead SC-70 and SOT-23 packages

APPLICATIONS

Isolated sensors Environmental control systems Computer thermal monitoring Thermal protection Industrial process control Power-system monitors

Temperature Sensor in 5-Lead SC-70

TMP05/TMP06

FUNCTIONAL BLOCK DIAGRAM

TMP05/TMP06

TEMPERATURE

CONV/I N

SENSOR

REFERENCE

CLK AND

TIMING

GENERATION

Σ-Δ

CORE

GND

Figure 1.

AVE RAG IN G

BLOCK/

COUNTER

OUTPUT

CONTROL

OUT

FUNC

03340-001

GENERAL DESCRIPTION

The TMP05/TMP06 are monolithic temperature sensors that generate a modulated serial digital output (PWM), which varies in direct proportion to the temperature of the devices. The high period (T while the low period (T high temperature accuracy of ±1°C from 0°C to 70°C with excellent transducer linearity. The digital output of the TMP05/ TMP06 is CMOS-/TTL-compatible and is easily interfaced to the serial inputs of most popular microprocessors. The flexible open-drain output of the TMP06 is capable of sinking 5 mA.

The TMP05/TMP06 are specified for operation at supply voltages from 3 V to 5.5 V. Operating at 3.3 V, the supply current is typically 370 µA. The TMP05/TMP06 are rated for operation over the –40°C to +150°C temperature range. It is not recommended to operate these devices at temperatures above 125°C for more than a total of 5% (5,000 hours) of the lifetime of the devices. They are packaged in low cost, low area SC-70 and SOT-23 packages.

The TMP05/TMP06 have three modes of operation: continuously converting mode, daisy-chain mode, and one shot mode.

) of the PWM remains static over all temperatures,

) varies. The B Grade version offers a

A three-state FUNC input determines the mode in which the TMP05/TMP06 operate.

The CONV/IN input pin is used to determine the rate at which the TMP05/TMP06 measure temperature in continuously converting mode and one shot mode. In daisy-chain mode, the CONV/IN pin operates as the input to the daisy chain.

PRODUCT HIGHLIGHTS

1. The TMP05/TMP06 have an on-chip temperature sensor

that allows an accurate measurement of the ambient temperature. The measurable temperature range is –40°C to +150°C.

2. Supply voltage is 3 V to 5.5 V.

3. Space-saving 5-lead SOT-23 and SC-70 packages.

4. Temperature accuracy is typically ±0.5°C. Each part needs

a decoupling capacitor to achieve this accuracy.

5. Temperature resolution of 0.025°C.

6. The TMP05/TMP06 feature a one shot mode that reduces

the average power consumption to 102 µW at 1 SPS.

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

TMP05/TMP06

TABLE OF CONTENTS

Features.............................................................................................. 1

Converter Details ....................................................................... 13

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

TMP05A/TMP06A Specifications ............................................. 3

TMP05B/TMP06B Specifications .............................................. 5

Timing Characteristics ................................................................ 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 13

Circuit Information.................................................................... 13

Functional Description.............................................................. 13

Operating Modes........................................................................ 13

TMP05 Output ........................................................................... 16

TMP06 Output ........................................................................... 16

Application Hints ........................................................................... 17

Thermal Response Time ........................................................... 17

Self-Heating Effects.................................................................... 17

Supply Decoupling..................................................................... 17

Layout Considerations............................................................... 18

Temperature Monitoring........................................................... 18

Daisy-Chain Application........................................................... 18

Continuously Converting Application.................................... 24

Outline Dimensions....................................................................... 26

Ordering Guide .......................................................................... 26

REVISION HISTORY

4/06—Rev. A to Rev. B

Changes to Table 1............................................................................ 3

Changes to Table 2............................................................................ 5

Changes to Table 8.......................................................................... 14

Changes to Table 9.......................................................................... 15

10/05—Rev. 0 to Rev. A

Changes to Specifications Table...................................................... 3

Changes to Absolute Maximum Ratings....................................... 8

Changes to Figure 4.......................................................................... 8

Changes to Figure 7........................................................................ 10

Changes to Figure 15...................................................................... 11

Deleted Figure 18............................................................................ 12

Changes to One Shot Mode Section ............................................ 14

Changes to Figure 20...................................................................... 14

Changes to Daisy-Chain Mode Section ...................................... 15

Changes to Figure 23...................................................................... 15

Changes to Equation 5 and Equation 7 ....................................... 17

Added Layout Considerations Section........................................ 18

Updated Outline Dimensions....................................................... 26

Changes to Ordering Guide.......................................................... 26

8/04—Revision 0: Initial Version

Rev. B | Page 2 of 28

TMP05/TMP06

SPECIFICATIONS

TMP05A/TMP06A SPECIFICATIONS

All A grade specifications apply for −40°C to +150°C, VDD decoupling capacitor is a 0.1 µF multilayer ceramic, TA = T V

= 3.0 V to 5.5 V, unless otherwise noted.

Table 1.

Parameter Min Typ Max Unit Test Conditions/Comments

TEMPERATURE SENSOR AND ADC

Nominal Conversion Rate (One Shot Mode) See Table 7

Accuracy @ VDD = 3.0 V to 5.5 V ±2 °C TA = 0°C to 70°C, VDD = 3.0 V to 5.5 V ±3 °C TA = –40°C to +100°C, VDD = 3.0 V to 5.5 V ±4 °C TA = –40°C to +125°C, VDD = 3.0 V to 5.5 V ±5

°C TA = –40°C to +150°C, VDD = 3.0 V to 5.5 V Temperature Resolution 0.025 °C/5 μs Step size for every 5 μs on TL TH Pulse Width 40 ms TA = 25°C, nominal conversion rate TL Pulse Width 76 ms TA = 25°C, nominal conversion rate

Quarter Period Conversion Rate

(All Operating Modes) See Tab le 7 Accuracy

@ VDD = 3.3 V (3.0 V to 3.6 V) ±1.5 °C TA = –40°C to +150°C

@ VDD = 5 V (4.5 V to 5.5 V) ±1.5 °C TA = –40°C to +150°C Temperature Resolution 0.1 °C/5 μs Step size for every 5 μs on TL TH Pulse Width 10 ms TA = 25°C, QI conversion rate TL Pulse Width 19 ms TA = 25°C, QP conversion rate

Double High/Quarter Low Conversion Rate

(All Operating Modes) See Tab le 7 Accuracy

@ VDD = 3.3 V (3.0 V to 3.6 V) ±1.5 °C TA = –40°C to +150°C

@ VDD = 5 V (4.5 V to 5.5 V) ±1.5 °C TA = –40°C to +150°C Temperature Resolution 0.1 °C/5 μs Step size for every 5 μs on TL TH Pulse Width 80 ms TA = 25°C, DH/QL conversion rate TL Pulse Width 19 ms TA = 25°C, DH/QL conversion rate

Long-Term Drift 0.081 °C Drift over 10 years, if part is operated at 55°C Temperature Hysteresis 0.0023 °C Temperature cycle = 25°C to 100°C to 25°C

SUPPLIES

Supply Voltage 3 5.5 V Supply Current

Normal Mode2

@ 3.3 V 370 600 μA Nominal conversion rate

@ 5.0 V 425 650 μA Nominal conversion rate Quiescent2

@ 3.3 V 3 12 μA Device not converting, output is high

@ 5.0 V 5.5 20 μA Device not converting, output is high One Shot Mode @ 1 SPS 30.9 μA

Average current @ V

nominal conversion rate @ 25°C

37.38 μA

Average current @ V

nominal conversion rate @ 25°C

Power Dissipation 803.33 μW

= 3.3 V, continuously converting at

nominal conversion rates @ 25°C

1 SPS 101.9 μW

Average power dissipated for V one shot mode @ 25°C

186.9 μW

Average power dissipated for V one shot mode @ 25°C

MIN

= 3.3 V,

= 5.0 V,

to T

MAX

= 3.3 V,

= 5.0 V,

Rev. B | Page 3 of 28

TMP05/TMP06

Parameter Min Typ Max Unit Test Conditions/Comments

TMP05 OUTPUT (PUSH-PULL)

Output High Voltage (VOH) VDD − 0.3 V IOH = 800 μA Output Low Voltage (VOL) 0.4 V IOL = 800 μA Output High Current (I Pin Capacitance 10 pF Rise Time (tLH)5 50 ns Fal l Time (tHL)

RON Resistance (Low Output) 55 Ω Supply and temperature dependent

TMP06 OUTPUT (OPEN DRAIN)3

Output Low Voltage (VOL) 0.4 V IOL = 1.6 mA Output Low Voltage (VOL) 1.2 V IOL = 5.0 mA Pin Capacitance 10 pF High Output Leakage Current (IOH) 0.1 5 μA PWM Device Turn-On Time 20 ms Fal l Time (tHL)6 30 ns RON Resistance (Low Output) 55 Ω Supply and temperature dependent

DIGITAL INPUTS3

Input Current ±1 μA VIN = 0 V to VDD Input Low Voltage (VIL) 0.3 × VDD V Input High Voltage (VIH) 0.7 × VDD V Pin Capacitance 3 10 pF

It is not recommended to operate the device at temperatures above 125°C for more than a total of 5% (5,000 hours) of the lifetime of the device. Any exposure beyond

this limit affects device reliability.

Normal mode current relates to current during TL. TMP05/TMP06 are not converting during TH, so quiescent current relates to current during TH.

Guaranteed by design and characterization, not production tested.

It is advisable to restrict the current being pulled from the TMP05 output because any excess currents going through the die cause self-heating. As a consequence,

false temperature readings can occur.

Test load circuit is 100 pF to GND.

Test load circuit is 100 pF to GND, 10 kΩ to 5.5 V.

OUT

)

2 mA Typ VOH = 3.17 V with VDD = 3.3 V

50 ns

= 5.5 V

OUT

Rev. B | Page 4 of 28

TMP05/TMP06

TMP05B/TMP06B SPECIFICATIONS

All B grade specifications apply for –40°C to +150°C; VDD decoupling capacitor is a 0.1 µF multilayer ceramic; TA = T V

= 3 V to 5.5 V, unless otherwise noted.

Table 2.

Parameter Min Typ Max Unit Test Conditions/Comments

TEMPERATURE SENSOR AND ADC

Nominal Conversion Rate (One Shot Mode) See Table 7

Accuracy1

@ VDD = 3.3 V (±5%) ±0.2 ±1 °C TA = 0°C to 70°C, VDD = 3.135 V to 3.465 V

@ VDD = 5 V (±10%) ±0.4 −1/+1.5 °C TA = 0°C to 70°C, VDD = 4.5 V to 5.5 V

@ VDD = 3.3 V (±10%) and 5 V (±10%) ±1.5 °C

±2 °C

±2.5 °C

±4.5

°C

= –40°C to +70°C, VDD = 3.0 V to 3.6 V,

= 4.5 V to 5.5 V

= –40°C to +100°C, VDD = 3.0 V to 3.6 V,

= 4.5 V to 5.5 V

= –40°C to +125°C, VDD = 3.0 V to 3.6 V,

= 4.5 V to 5.5 V

= –40°C to +150°C, VDD = 3.0 V to 3.6 V,

= 4.5 V to 5.5 V

Temperature Resolution 0.025 °C/5 μs Step size for every 5 μs on TL TH Pulse Width 40 ms TA = 25°C, nominal conversion rate TL Pulse Width 76 ms TA = 25°C, nominal conversion rate

Quarter Period Conversion Rate

See

Table 7

(All Operating Modes)

Accuracy

@ VDD = 3.3 V (3.0 V to 3.6 V) ±1.5 °C TA = –40°C to +150°C

@ VDD = 5.0 V (4.5 V to 5.5 V) ±1.5 °C TA = –40°C to +150°C Temperature Resolution 0.1 °C/5 μs Step size for every 5 μs on TL TH Pulse Width 10 ms TA = 25°C, QP conversion rate TL Pulse Width 19 ms TA = 25°C, QP conversion rate

Double High/Quarter Low Conversion Rate

See

Table 7

(All Operating Modes) Accuracy

@ VDD = 3.3 V (3.0 V to 3.6 V) ±1.5 °C TA = –40°C to +150°C

Long-Term Drift

0.081 °C Drift over 10 years, if part is operated at 55°C

Temperature Hysteresis 0.0023 °C Temperature cycle = 25°C to 100°C to 25°C

SUPPLIES

Supply Voltage 3 5.5 V Supply Current

Normal Mode3

@ 3.3 V 370 600 μA Nominal conversion rate

@ 5.0 V 425 650 μA Nominal conversion rate Quiescent

@ 3.3 V 3 12 μA Device not converting, output is high

@ 5.0 V 5.5 20 μA Device not converting, output is high One Shot Mode @ 1 SPS 30.9 μA

Average current @ V nominal conversion rate @ 25°C

37.38 μA

Average current @ V nominal conversion rate @ 25°C

to T

MIN

= 3.3 V,

= 5.0 V,

MAX

Rev. B | Page 5 of 28

TMP05/TMP06

Parameter Min Typ Max Unit Test Conditions/Comments

Power Dissipation 803.33 μW

1 SPS 101.9 μW

186.9 μW

TMP05 OUTPUT (PUSH-PULL)

Output High Voltage (VOH) VDD − 0.3 V IOH = 800 μA Output Low Voltage (VOL) 0.4 V IOL = 800 μA Output High Current (I

OUT

)

2 mA Typical VOH = 3.17 V with VDD = 3.3 V Pin Capacitance 10 pF Rise Time (tLH)6 50 ns Fall Time (tHL)6 50 ns RON Resistance (Low Output) 55 Ω Supply and temperature dependent

TMP06 OUTPUT (OPEN DRAIN)4

Output Low Voltage (VOL) 0.4 V IOL = 1.6 mA Output Low Voltage (VOL) 1.2 V IOL = 5.0 mA Pin Capacitance 10 pF High Output Leakage Current (IOH) 0.1 5 μA PWM Device Turn-On Time 20 ms Fall Time (tHL)

30 ns RON Resistance (Low Output) 55 Ω Supply and temperature dependent

DIGITAL INPUTS

Input Current ±1 μA VIN = 0 V to VDD Input Low Voltage (VIL) 0.3 × VDD V Input High Voltage (VIH) 0.7 × VDD V Pin Capacitance 3 10 pF

The accuracy specifications for 3.0 V to 3.6 V and 4.5 V to 5.5 V supply ranges are specified to 3-Σ performance.

It is not recommended to operate the device at temperatures above 125°C for more than a total of 5% (5,000 hours) of the lifetime of the device. Any exposure beyond

this limit affects device reliability.

Normal mode current relates to current during TL. TMP05/TMP06 are not converting during TH, so quiescent current relates to current during TH.

Guaranteed by design and characterization, not production tested.

It is advisable to restrict the current being pulled from the TMP05 output because any excess currents going through the die cause self-heating. As a consequence,

false temperature readings can occur.

Test load circuit is 100 pF to GND.

Test load circuit is 100 pF to GND, 10 kΩ to 5.5 V.

= 3.3 V, continuously converting at

nominal conversion rates @ 25°C Average power dissipated for V

one shot mode @ 25°C Average power dissipated for V

one shot mode @ 25°C

= 5.5 V

OUT

= 3.3 V,

= 5.0 V,

Rev. B | Page 6 of 28

TMP05/TMP06

TIMING CHARACTERISTICS

TA = T

Table 3.

Parameter Limit Unit Comments

TH 40 ms typ PWM high time @ 25°C under nominal conversion rate TL 76 ms typ PWM low time @ 25°C under nominal conversion rate

t5 25 μs max Daisy-chain start pulse width

Test load circuit is 100 pF to GND.

Test load circuit is 100 pF to GND, 10 kΩ to 5.5 V.

to T

MIN

, VDD = 3.0 V to 5.5 V, unless otherwise noted. Guaranteed by design and characterization, not production tested.

MAX

50 ns typ TMP05 output rise time

50 ns typ TMP05 output fall time

30 ns typ TMP06 output fall time

90%10%

90% 10%

03340-002

Figure 2. PWM Output Nominal Timing Diagram (25°C)

START PULS E

03340-003

Figure 3. Daisy-Chain Start Timing

Rev. B | Page 7 of 28

TMP05/TMP06

ABSOLUTE MAXIMUM RATINGS

Table 4.

Parameter Rating

VDD to GND –0.3 V to +7 V Digital Input Voltage to GND –0.3 V to VDD + 0.3 V Maximum Output Current (OUT) ±10 mA Operating Temperature Range

–40°C to +150°C Storage Temperature Range –65°C to +160°C Maximum Junction Temperature, TJ max 150°C 5-Lead SOT-23 (RJ-5)

Power Dissipation

= (TJ max – T

MAX

)/θJA

Thermal Impedance4

θJA, Junction-to-Ambient (Still Air) 240°C/W

5-Lead SC-70 (KS-5)

Power Dissipation2 W

= (TJ max – T

MAX

)/θJA

Thermal Impedance4

θJA, Junction-to-Ambient 534.7°C/W θJC, Junction-to-Case 172.3°C/W

IR Reflow Soldering

Peak Temperature 220°C (0°C/5°C) Time at Peak Temperature 10 sec to 20 sec Ramp-Up Rate 2°C/s to 3°C/s Ramp-Down Rate −6°C/s Time 25°C to Peak Temperature 6 minutes max

IR Reflow Soldering (Pb-Free Package)

Peak Temperature 260°C (0°C) Time at Peak Temperature 20 sec to 40 sec Ramp-Up Rate 3°C/sec max Ramp-Down Rate –6°C/sec max Time 25°C to Peak Temperature 8 minutes max

It is not recommended to operate the device at temperatures above 125°C

for more than a total of 5% (5,000 hours) of the lifetime of the device. Any exposure beyond this limit affects device reliability.

SOT-23 values relate to the package being used on a 2-layer PCB and SC-70

values relate to the package being used on a 4-layer PCB. See Figure 4 for a plot of maximum power dissipation vs. ambient temperature (T

TA = ambient temperature.

Junction-to-case resistance is applicable to components featuring a

preferential flow direction, for example, components mounted on a heat sink. Junction-to-ambient resistance is more useful for air-cooled PCB mounted components.

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

MAXIMUM POWER DISSIPATION (W)

0.1

–40

–30

–20

–10

TEMPERATURE (°C)

SOT-23

SC-70

100

110

120

130

140

Figure 4. Maximum Power Dissipation vs. Ambient Temperature

03340-0-040

150

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

Rev. B | Page 8 of 28

TMP05/TMP06

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

OUT

Table 5. Pin Function Descriptions

Pin No. Mnemonic Description

1 OUT

Digital Output. Pulse-width modulated (PWM) output gives a square wave whose ratio of high-to-low period is proportional to temperature.

2 CONV/IN

Digital Input. In continuously converting and one shot operating modes, a high, low, or float input determines the temperature measurement rate. In daisy-chain operating mode, this pin is the input pin for the PWM signal from the previous part on the daisy chain.

3 FUNC

Digital Input. A high, low, or float input on this pin gives three different modes of operation. For details, see the

Operating Modes section. 4 GND Analog and Digital Ground. 5 VDD

Positive Supply Voltage, 3.0 V to 5.5 V. Using a decoupling capacitor of 0.1 μF as close as possible to this pin is

strongly recommended.

TMP05/

CONV/I N

FUNC

Figure 5. Pin Configuration

TMP06

TOP VIEW

(Not to Scale)

GND

03340-005

Rev. B | Page 9 of 28

TMP05/TMP06

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT FREQUENCY (Hz)

VDD = 3.3V AND 5V

OUT PIN L OADED WIT H 10kΩ

–50 –30 –10 10 30 50 70 90 110 130 150

TEMPERATURE ( °C)

03340-020

VDD = 3.3V AND 5V C

LOAD

VO LTAG E (V )

1V/DIV

= 100pF

TIME (ns)

100ns/DIV

03340-023

Figure 6. PWM Output Frequency vs. Temperature

8.57

8.56

8.55

8.54

8.53

8.52

OUTPUT FREQUENCY (Hz)

8.51

OUT PIN LOADED WITH 10kΩ AMBIENT TEMPERATURE = 25°C

8.50

3.0

3.3 3.6 3.9 4.2 4.5 4. 8 5.1 5.4

SUPPLY VOLTAGE (V)

Figure 7. PWM Output Frequency vs. Supply Voltage

140

VDD = 3.3V AND 5V OUT PIN L OADED WIT H 10kΩ

120

TL TIME

100

TIME (ms)

TIME

Figure 9. TMP05 Output Rise Time at 25°C

VDD = 3.3V AND 5V C

= 100pF

LOAD

VO LTAG E (V )

1V/DIV

03340-041

TIME (ns)

100ns/DIV

03340-024

Figure 10. TMP05 Output Fall Time at 25°C

VDD = 3.3V AND 5V R

= 1kΩ

PULLUP

= 10kΩ

LOAD

= 100pF

LOAD

VO LTAG E (V )

–50 –30 –10 10 30 50 70 90 110 130 150

Figure 8. T

TEMPERATURE ( °C)

and TL Times vs. Temperature

03340-022

Rev. B | Page 10 of 28

1V/DIV

TIME (ns)

Figure 11. TMP06 Output Fall Time at 25°C

100ns/DIV

03340-025

TMP05/TMP06

2000

VDD = 3.3V AND 5V

1800

1600

1400

1200

1000

TIME (ns)

800

600

400

200

0 10000900080007000600050004000300020001000

CAPACTIVE L OAD (pF)

RISE TIME

FAL L T IM E

Figure 12. TMP05 Output Rise and Fall Times vs. Capacitive Load

03340-026

1.25

1.00

CONTINUOUS MODE OPERATION

0.75 NOMINAL CONVERSION RATE

0.50

0.25

–0.25

–0.50

TEMPERATURE ERROR (° C)

–0.75

–1.00

–1.25

–40

–20 0 20 40 60 80 100 120 140

Figure 15. Output Accuracy vs. Temperature

3.3V

TEMPERATURE (°C)

03340-042

250

VDD = 3.3V AND 5V

200

150

100

= 0.5mA

OUTPUT LOW VOLTAGE (mV)

0 –50 –25 0 25 50 75 100 125 150

LOAD

TEMPERATURE ( °C)

LOAD

= 1mA

= 5mA

Figure 13. TMP06 Output Low Voltage vs. Temperature

VDD = 3.3V AND 5V

350

VDD = 3.3V AND 5V CONTINUOUS MODE OPERATION NOMINAL CONVERSION RATE

300

NO LOAD ON OUT PIN

250

200

150

100

SUPPLY CURRENT (µA)

0 –50 –25 0 25 50 75 100 125 150

03340-027

TEMPERATURE ( °C)

03340-030

Figure 16. Supply Current vs. Temperature

255

AMBIENT TEMPERATURE = 25°C CONTINUOUS MODE OPERATION

250

NOMINAL CONVERSION RATE NO LOAD ON O UT PIN

245

240

SINK CURRENT (mA)

–50 –25 0 25 50 75 100 125 150

TEMPERATURE ( °C)

Figure 14. TMP06 Open Drain Sink Current vs. Temperature

03340-028

Rev. B | Page 11 of 28

SUPPLY CURRENT (µA)

235

230

225

220

215

2.7 5.75.45. 14.84. 54.23. 93.63. 33.0

SUPPLY VOLTAGE (V)

Figure 17. Supply Current vs. Supply Voltage

03340-031

TMP05/TMP06

140

120

100

FINAL TEMPERATURE = 120° C

1.25

VDD = 3.3V AND 5V AMBIENT TEMPERATURE = 25°C

1.00

0.75

TEMPERATURE (°C)

0 10203040506070

TEMPERATURE OF ENVIRONMENT (30°C) CHANGED HERE

TIME ( Seconds)

Figure 18. Response to Thermal Shock

03340-033

0.50

TEMPERATURE ERROR (°C)

0.25

0 5 10 15 20 25 30

LOAD CURRENT (mA)

Figure 19. TMP05 Temperature Error vs. Load Current

03340-034

Rev. B | Page 12 of 28

TMP05/TMP06

THEORY OF OPERATION

CIRCUIT INFORMATION

The TMP05/TMP06 are monolithic temperature sensors that generate a modulated serial digital output that varies in direct proportion with the temperature of each device. An on-board sensor generates a voltage precisely proportional to absolute temperature, which is compared to an internal voltage reference and is input to a precision digital modulator. The ratiometric encoding format of the serial digital output is independent of the clock drift errors common to most serial modulation techniques such as voltage-to-frequency converters. Overall accuracy for the A grade is ±2°C from 0°C to +70°C with excellent transducer linearity. B grade accuracy is ±1°C from 0°C to 70°C. The digital output of the TMP05 is CMOS-/TTLcompatible and is easily interfaced to the serial inputs of most popular microprocessors. The open-drain output of the TMP06 is capable of sinking 5 mA.

The on-board temperature sensor has excellent accuracy and linearity over the entire rated temperature range without correction or calibration by the user.

The sensor output is digitized by a first-order Σ-∆ modulator, also known as the charge balance type analog-to-digital converter. This type of converter utilizes time-domain oversampling and a high accuracy comparator to deliver 12 bits of effective accuracy in an extremely compact circuit.

CONVERTER DETAILS

The Σ-∆ modulator consists of an input sampler, a summing network, an integrator, a comparator, and a 1-bit DAC. Similar to the voltage-to-frequency converter, this architecture creates, in effect, a negative feedback loop whose intent is to minimize the integrator output by changing the duty cycle of the comparator output in response to input voltage changes. The comparator samples the output of the integrator at a much higher rate than the input sampling frequency, which is called oversampling. Oversampling spreads the quantization noise over a much wider band than that of the input signal, improving overall noise performance and increasing accuracy.

Σ-Δ MODULATOR

VOLTAGE REF

AND VPTAT

CLOCK

GENERATOR

INTEGRATOR

–

Figure 20. First-Order Σ-∆ Modulator

1-BIT

DAC

COMPARATOR

–

DIGITAL

FILTER

TMP05/T MP06

OUT

(SINGLE-BIT)

3340-006

The modulated output of the comparator is encoded using a circuit technique that results in a serial digital signal with a mark-space ratio format. This format is easily decoded by any microprocessor into either °C or °F values, and is readily transmitted or modulated over a single wire. More importantly, this encoding method neatly avoids major error sources common to other modulation techniques because it is clockindependent.

FUNCTIONAL DESCRIPTION

The output of the TMP05/TMP06 is a square wave with a typical period of 116 ms at 25°C (CONV/IN pin is left floating). The high period, T

, is constant, while the low period, TL, varies

with measured temperature. The output format for the nominal conversion rate is readily decoded by the user as follows:

Temperature (°C) = 421 − (751 × (T

)) (1)

H/TL

Figure 21. TMP05/TMP06 Output Format

The time periods TH (high period) and TL (low period) are values easily read by a microprocessor timer/counter port, with the above calculations performed in software. Because both periods are obtained consecutively using the same clock, performing the division indicated in Equation 1 results in a ratiometric value independent of the exact frequency or drift of the TMP05/TMP06 originating clock or the user’s counting clock.

OPERATING MODES

The user can program the TMP05/TMP06 to operate in three different modes by configuring the FUNC pin on power-up as either low, floating, or high.

Table 6. Operating Modes

FUNC Pin Operating Mode

Low One shot Floating Continuously converting High Daisy-chain

Continuously Converting Mode

In continuously converting mode, the TMP05/TMP06 continuously output a square wave representing temperature. The frequency at which this square wave is output is determined by the state of the CONV/IN pin on power-up. Any change to the state of the CONV/IN pin after power-up is not reflected in the parts until the TMP05/TMP06 are powered down and back up.

03340-007

Rev. B | Page 13 of 28

TMP05/TMP06

One Shot Mode

In one shot mode, the TMP05/TMP06 output one square wave representing temperature when requested by the microcontroller. The microcontroller pulls the OUT pin low and then releases it to indicate to the TMP05/TMP06 that an output is required. The time between the OUT pin going low to the time it is released should be greater than 20 ns. Internal hysteresis in the OUT pin prevents the TMP05/TMP06 from recognizing that the pulse is going low (if it is less than 20 ns). The temperature measurement is output when the OUT line is released by the microcontroller (see

µCONTROLLERPULLS DOWN OUT LINE HERE

TEMP MEASUREMENT

>20ns

Figure 22).

µCONTROLLER RELEASES OUT LINE HERE

Conversion Rate

In continuously converting and one shot modes, the state of the CONV/IN pin on power-up determines the rate at which the TMP05/TMP06 measure temperature. The available conversion rates are shown in

Tabl e 7 .

Table 7. Conversion Rates

CONV/IN Pin Conversion Rate TH/TL (25°C)

Low

Quarter period

/4, TL/4)

10/19 (ms)

Floating Nominal 40/76 (ms) High

Double high (T

Quarter low (T

x 2)

/4)

80/19 (ms)

The TMP05 (push-pull output) advantage when using the high state conversion rate (double high/quarter low) is lower power consumption. However, the trade-off is loss of resolution on the low time. Depending on the state of the CONV/IN pin, two different temperature equations must be used.

Figure 22. TMP05/TMP06 One Shot OUT Pin Signal

TIME

03340-019

In the TMP05 one shot mode only, an internal resistor is switched in series with the pull-up MOSFET. The TMP05 OUT pin has a push-pull output configuration (see

Figure 23). Therefore, it needs a series resistor to limit the current drawn on this pin when the user pulls it low to start a temperature conversion. This series resistance prevents any short circuit from V

to GND, and, as a result, protects the TMP05 from

short-circuit damage.

V+

5kΩ

OUT

TMP05

Figure 23. TMP05 One Shot Mode OUT Pin Configuration

03340-016

The advantages of the one shot mode include lower average power consumption, and the microcontroller knowing that the first low-to-high transition occurs after the microcontroller releases the OUT pin.

The temperature equation for the low and floating states’ conversion rates is

Temperature (°C) = 421 − (751 × (T

)) (2)

H/TL

Table 8. Conversion Times Using Equation 2

Temperature (°C) TL (ms) Cycle Time (ms)

–40 65.2 105 –30 66.6 107 –20 68.1 108 –10 69.7 110 0 71.4 111 10 73.1 113 20 74.9 115 25 75.9 116 30 76.8 117 40 78.8 119 50 81 121 60 83.2 123 70 85.6 126 80 88.1 128 90 90.8 131 100 93.6 134 110 96.6 137 120 99.8 140 130 103.2 143 140 106.9 147 150 110.8 151

Rev. B | Page 14 of 28

TMP05/TMP06

The temperature equation for the high state conversion rate is

Temperature (°C) = 421 − (93.875 × (T

)) (3)

H/TL

Table 9. Conversion Times Using Equation 3

Temperature (°C) TL (ms) Cycle Time (ms)

–40 16.3 96.2 –30 16.7 96.6 –20 17 97.03 –10 17.4 97.42 0 17.8 97.84 10 18.3 98.27 20 18.7 98.73 25 19 98.96 30 19.2 99.21 40 19.7 99.71 50 20.2 100.24 60 20.8 100.8 70 21.4 101.4 80 22 102.02 90 22.7 102.69 100 23.4 103.4 110 24.1 104.15 120 25 104.95 130 25.8 105.81 140 26.7 106.73 150 27.7 107.71

Daisy-Chain Mode

Setting the FUNC pin to a high state allows multiple TMP05/ TMP06s to be connected together and, therefore, allows one input line of the microcontroller to be the sole receiver of all temperature measurements. In this mode, the CONV/IN pin operates as the input of the daisy chain. In addition, conversions take place at the nominal conversion rate of T

= 40 ms/76 ms at 25°C.

H/TL

Therefore, the temperature equation for the daisy-chain mode of operation is

Temperature (°C) = 421 − (751 × (T

OUT

CONV/IN

TMP05/

MICRO

TMP06

CONV/IN

OUT

TMP05/

TMP06

OUT

Figure 24. Daisy-Chain Structure

)) (4)

HTL

CONV/IN

TMP05/

TMP06

OUT

CONV/I N

TMP05/ TMP06

OUT

03340-009

A second microcontroller line is needed to generate the conversion start pulse on the CONV/IN pin. The pulse width of the start pulse should be less than 25 µs but greater than 20 ns. The start pulse on the CONV/IN pin lets the first TMP05/TMP06 part know that it should now start a conversion and output its own temperature. Once the part has output its own temperature, it outputs a start pulse for the next part on the daisy-chain link. The pulse width of the start pulse from each TMP05/TMP06 part is typically 17 µs.

Figure 25 shows the start pulse on the CONV/IN pin of the first device on the daisy chain.

Figure 26 shows the PWM output by

this first part.

Before the start pulse reaches a TMP05/TMP06 part in the daisy chain, the device acts as a buffer for the previous temperature measurement signals. Each part monitors the PWM signal for the start pulse from the previous part. Once the part detects the start pulse, it initiates a conversion and inserts the result at the end of the daisy-chain PWM signal. It then inserts a start pulse for the next part in the link. The final signal input to the microcontroller should look like

Figure 27. The input signal on Pin 2 (IN) of the first daisy-chain device must remain low until the last device has output its start pulse.

If the input on Pin 2 (IN) goes high and remains high, the TMP05/TMP06 part powers down between 0.3 sec and 1.2 sec later. The part, therefore, requires another start pulse to generate another temperature measurement. Note that to reduce power dissipation through the part, it is recommended to keep Pin 2 (IN) at a high state when the part is not converting. If the IN pin is at 0 V, the OUT pin is at 0 V (because it is acting as a buffer when not converting), and is drawing current through either the pull-up MOSFET (TMP05) or the pull-up resistor (TMP06).

MUST GO HIGH ONLY AFTER START PULSE HAS BEEN OUTPUT BY LAST TMP05/T MP06 ON DAIS Y CHAIN.

START PULSE

TIME

CONVERSION STARTS ON THIS EDGE

TIME

START PULSE

17µs

3340-017

03340-010

>20ns

AND

>20ns

<25µs

Figure 25. Start Pulse at CONV/IN Pin of First

TMP05/TMP06 Device on Daisy Chain

#1 TEMP MEASUREM ENT

Figure 26. Daisy-Chain Temperature Measurement

and Start Pulse Output from First TMP05/TMP06

Rev. B | Page 15 of 28

TMP05/TMP06

#1 TEMP MEASUREMENT #2 TEMP MEASUREMENT #N TEMP MEASUREMENT

START

PULSE

Figure 27. Daisy-Chain Signal at Input to the Microcontroller

TMP05 OUTPUT

The TMP05 has a push-pull CMOS output (Figure 28) and provides rail-to-rail output drive for logic interfaces. The rise and fall times of the TMP05 output are closely matched so that errors caused by capacitive loading are minimized. If load capacitance is large (for example, when driving a long cable), an external buffer could improve accuracy.

An internal resistor is connected in series with the pull-up MOSFET when the TMP05 is operating in one shot mode.

V+

OUT

TMP05

Figure 28. TMP05 Digital Output Structure

03340-011

TIME

03340-008

TMP06 OUTPUT

The TMP06 has an open-drain output. Because the output source current is set by the pull-up resistor, output capacitance should be minimized in TMP06 applications. Otherwise, unequal rise and fall times skew the pulse width and introduce measurement errors.

OUT

TMP06

Figure 29. TMP06 Digital Output Structure

03340-012

Rev. B | Page 16 of 28

TMP05/TMP06

APPLICATION HINTS

THERMAL RESPONSE TIME

The time required for a temperature sensor to settle to a specified accuracy is a function of the sensor’s thermal mass and the thermal conductivity between the sensor and the object being sensed. Thermal mass is often considered equivalent to capacitance. Thermal conductivity is commonly specified using the symbol Q and can be thought of as thermal resistance. It is usually specified in units of degrees per watt of power transferred across the thermal joint. Thus, the time required for the TMP05/ TMP06 to settle to the desired accuracy is dependent on the package selected, the thermal contact established in that particular application, and the equivalent power of the heat source. In most applications, the settling time is probably best determined empirically.

SELF-HEATING EFFECTS

The temperature measurement accuracy of the TMP05/TMP06 can be degraded in some applications due to self-heating. Errors are introduced from the quiescent dissipation and power dissipated when converting, that is, during T temperature errors depends on the thermal conductivity of the TMP05/TMP06 package, the mounting technique, and the effects of airflow. Static dissipation in the TMP05/TMP06 is typically 10 µW operating at 3.3 V with no load. In the 5-lead SC-70 package mounted in free air, this accounts for a temperature increase due to self-heating of

T = P

× θJA = 10 µW × 534.7°C/W = 0.0053°C (5)

DISS

In addition, power is dissipated by the digital output, which is capable of sinking 800 µA continuously (TMP05). Under an 800 µA load, the output can dissipate

= (0.4 V)(0.8 mA)((TL)/TH + TL)) (6)

DISS

. The magnitude of these

SUPPLY DECOUPLING

The TMP05/TMP06 should be decoupled with a 0.1 µF ceramic capacitor between V if the TMP05/TMP06 are mounted remotely from the power supply. Precision analog products such as the TMP05/TMP06 require a well filtered power source. Because the parts operate from a single supply, simply tapping into the digital logic power supply could appear to be a convenient option. Unfortunately, the logic supply is often a switch-mode design, which generates noise in the 20 kHz to 1 MHz range. In addition, fast logic gates can generate glitches hundreds of mV in amplitude due to wiring resistance and inductance.

If possible, the TMP05/TMP06 should be powered directly from the system power supply. This arrangement, shown in Figure 30, isolates the analog section from the logic switching transients. Even if a separate power supply trace is not available, generous supply bypassing reduces supply-line-induced errors. Local supply bypassing consisting of a 0.1 µF ceramic capacitor is critical for the temperature accuracy specifications to be achieved. This decoupling capacitor must be placed as close as possible to the TMP05/TMP06 V decoupling capacitor is Phicomp’s 100 nF, 50 V X74.

It is important to keep the capacitor package size as small as possible because ESL (equivalent series inductance) increases with increasing package size. Reducing the capacitive value below 100 nF increases the ESR (equivalent series resistance). Using a capacitor with an ESL of 1 nH and an ESR of 80 mΩ is recommended.

TTL/CMOS

LOGIC

CIRCUITS

and GND. This is particularly important

pin. A recommended

TMP05/

0.1µF

TMP06

For example, with T

= 80 ms and TH = 40 ms, the power

dissipation due to the digital output is approximately 0.21 mW. In a free-standing SC-70 package, this accounts for a temperature increase due to self-heating of

T = P

× θJA = 0.21 mW × 534.7°C/W = 0.112°C (7)

DISS

This temperature increase directly adds to that from the quiescent dissipation and affects the accuracy of the TMP05/ TMP06 relative to the true ambient temperature.

It is recommended that current dissipated through the device be kept to a minimum because it has a proportional effect on the temperature error.

Rev. B | Page 17 of 28

POWER SUPPLY

Figure 30. Use Separate Traces to Reduce Power Supply Noise

03340-013

TMP05/TMP06

LAYOUT CONSIDERATIONS

Digital boards can be electrically noisy environments and glitches are common on many of the signals in the system. The likelihood of glitches causing problems to the TMP05/ TMP06 OUT pin is very minute. The typical impedance of the TMP05/TMP06 OUT pin when driving low is 55 Ω. When driving high, the TMP05 OUT pin is similar. This low impedance makes it very difficult for a glitch to break the V thresholds. There is a slight risk that a sizeable glitch could cause problems. A glitch can only cause problems when the OUT pin is low during a temperature measurement. If a glitch occurs that is large enough to fool the master into believing that the temperature measurement is over, the temperature read would not be the actual temperature. In most cases, the master spots a temperature value that is erroneous and can request another temperature measurement for confirmation. One area that can cause problems is if this very large glitch occurs near the end of the low period of the mark-space waveform, and the temperature read back is so close to the expectant temperature that the master does not question it.

One layout method that helps in reducing the possibility of a glitch is to run ground tracks on either side of the OUT line. Use a wide OUT track to minimize inductance and reduce noise pickup. A 10 mil track minimum width and spacing is recommended.

Figure 31 shows how glitch protection traces

could be laid out.

GND

OUT

GND

Figure 31. Use Separate Traces to Reduce Power Supply Noise

10 MIL

and VIH

03340-043

nearby heat source, the thermal impedance between the heat source and the TMP05/TMP06 must be considered. Often, a thermocouple or other temperature sensor is used to measure the temperature of the source, while the TMP05/TMP06 temperature is monitored by measuring T

and TL. Once the

thermal impedance is determined, the temperature of the heat source can be inferred from the TMP05/TMP06 output.

One example of using the TMP05/TMP06’s unique properties is in monitoring a high power dissipation microprocessor. Each TMP05/TMP06 part, in a surface-mounted package, is mounted directly beneath the microprocessor’s pin grid array (PGA) package. In a typical application, the TMP05/TMP06 output is connected to an ASIC, where the pulse width is measured. The TMP05/TMP06 pulse output provides a significant advantage in this application because it produces a linear temperature output while needing only one I/O pin and without requiring an ADC.

DAISY-CHAIN APPLICATION

This section provides an example of how to connect two TMP05s in daisy-chain mode to a standard 8052 microcontroller core. The core processing engine is the 8052. Figure 31 shows how to interface to the 8052 core device. The Example 1

ADuC812 to two daisy-chained TMP05s. This code can also be

used with the 8052 core.

IMER T0 TART S

TEMP_HIGH0

ADuC812 is the microcontroller used and the

TMP05 Program Code

section shows how to communicate from the

ADuC831 or any microprocessor running on an

TEMPSEGMENT = 1 TEMPSEGMENT = 2 TEMPSEGMENT = 3

TEMP_HIGH2TEMP_HIGH1

INTO

INTO INTO

Another method that helps reduce the possibility of a glitch is to use a 50 ns glitch filter on the OUT line. The glitch filter eliminates any possibility of a glitch getting through to the master or being passed along a daisy chain.

TEMPERATURE MONITORING

The TMP05/TMP06 are ideal for monitoring the thermal environment within electronic equipment. For example, the surface-mounted package accurately reflects the exact thermal conditions that affect nearby integrated circuits.

The TMP05/TMP06 measure and convert the temperature at the surface of their own semiconductor chip. When the

Figure 32. Reference Diagram for Software Variables

in the

Figure 32 is a diagram of the input waveform into the ADuC812 from the TMP05 daisy chain. It illustrates how the code’s variables are assigned and it should be referenced when reading the TMP05 Program Code Example 1. Application notes showing the TMP05 working with other types of microcontrollers are available from Analog Devices at

Figure 33 shows how the three devices are hardwired together. Figure 34 to Figure 36 are flow charts for this program.

TEMP_LOW0 TEMP_LOW1

TMP05 Program Code Example 1

www.analog.com.

03340-035

TMP05/TMP06 are used to measure the temperature of a

Rev. B | Page 18 of 28

TMP05/TMP06

START PULSE

0.1µF

TMP05 (U1)

OUT

CONV/IN

FUNC

GND

TMP05 (U2)

OUT

CONV/IN

GND F UNC

(U1)

TIME

START

PULSE

ADuC812

P3.7

P3.2/INTO

(U1)

(U2)

(U1)

TIME

START PULSE

(U2)

03340-014

Figure 33. Typical Daisy-Chain Application Circuit

Rev. B | Page 19 of 28

TMP05/TMP06

DECLARE VARIABLES

SET-UP UART

INITIALIZE TIMERS

ENABLE TIMER

INTERRUPTS

SEND START

PULSE

START TIMER 0

SET-UP EDGE

TRIGGERED

(H-L) INTO

ENABLE INTO

INTERRUPT

ENABLE GLO BAL

INTERRUPTS

WAIT F OR

INTERRUPT

PROCESS

INTERRUPTS

WAIT FOR END

OF MEASUREM ENT

Figure 35.

CONVERT VARIABLES

TO FLOATS

CALCULATE

TEMPERATURE

FROM U1

TEMP U1 =

421 – (751 × ( TEMP_HI GH0/

(TEMP_LOW0 – (TEMP_HIGH1)))

CALCULATE

TEMPERATURE

FROM U2

TEMP U2 =

421 – (751 × ( TEMP_HI GH1/

(TEMP_LOW1 – (TEMP_HIGH2)))

SEND TEMPERATURE

RESULTS

OUT OF UART

03340-038

ADuC812 Temperature Calculation Routine Flowchart

Figure 34.

CALCULATE

TEMPERATURE

AND SEND

FROM UART

03340-036

ADuC812 Main Routine Flowchart

Rev. B | Page 20 of 28

TMP05/TMP06

ENTER INTERRUPT

ROUTI NE

CHECK IF TIMER 1

IS RUNNING

YES

START TIMER 1

COPY TIMER 1 VALUES

INTO A REGISTER

RESET TIMER 1

IS TEMPSEGMENT

= 1

YE S

CALCULATE

TEMP_HIGH0

RESET TIM ER 0

TO ZERO

IS TEMPSEGMENT

= 2

YES

CALCULATE

TEMP_LOW0

USING TIMER 1

VAL UES

CALCULATE

TEMP_HIGH1

USING TIMER 0

VAL UES

RESET TIMER 0

TO ZERO

Figure 36.

IS TEMPSEGMENT

= 3

CALCULATE

TEMP_LOW1

CALCULATE

TEMP_HIGH2

USING TI MER 0

VAL UES

ADuC812 Interrupt Routine Flowchart

YE S

INCREMENT

TEMPSEGMENT

EXIT INT ERRUPT

ROUTINE

TMP05 Program Code Example 1

//============================================================================================= // Description : This program reads the temperature from 2 daisy-chained TMP05 parts.

// // This code runs on any standard 8052 part running at 11.0592MHz. // If an alternative core frequency is used, the only change required is an // adjustment of the baud rate timings. // // P3.2 = Daisy-chain output connected to INT0. // P3.7 = Conversion control. // Timer0 is used in gate mode to measure the high time. // Timer1 is triggered on a high-to-low transition of INT0 and is used to measure // the low time. //=============================================================================================

03340-037

Rev. B | Page 21 of 28

TMP05/TMP06

#include <stdio.h> #include <ADuC812.h> //ADuC812 SFR definitions void delay(int); sbit Daisy_Start_Pulse = 0xB7; //Daisy_Start_Pulse = P3.7 sbit P3_4 = 0xB4; long temp_high0,temp_low0,temp_high1,temp_low1,temp_high2,th,tl; //Global variables to allow //access during ISR.

//See int timer0_count=0,timer1_count=0,tempsegment=0;

void int0 () interrupt 0 //INT0 Interrupt Service Routine { if (TR1 == 1) { th = TH1; tl = TL1; th = TH1; //To avoid misreading timer TL1 = 0; TH1 = 0; } TR1=1; //Start timer1 running, if not running Already

if (tempsegment == 1) { temp_high0 = (TH0*0x100+TL0)+(timer0_count*65536); //Convert to integer TH0=0x00; //Reset count TL0=0x00; timer0_count=0; } if (tempsegment == 2) { temp_low0 = (th*0x100+tl)+(timer1_count*65536); //Convert to integer temp_high1 = (TH0*0x100+TL0)+(timer0_count*65536); //Convert to integer TH0=0x00; //Reset count TL0=0x00; timer0_count=0; timer1_count=0; } if (tempsegment == 3) { temp_low1 = (th*0x100+tl)+(timer1_count*65536); //Convert to integer temp_high2 = (TH0*0x100+TL0)+(timer0_count*65536); TH0=0x00; //Reset count TL0=0x00; timer0_count=0; timer1_count=0; }

tempsegment++; }

void timer0 () interrupt 1 { timer0_count++; //Keep a record of timer0 overflows } void timer1 () interrupt 3 { timer1_count++; //Keep a record of timer1 overflows

Figure 32.

Rev. B | Page 22 of 28

TMP05/TMP06

} void main(void) { double temp1=0,temp2=0; double T1,T2,T3,T4,T5;

// Initialization TMOD = 0x19; // Timer1 in 16-bit counter mode // Timer0 in 16-bit counter mode // with gate on INT0. Timer0 only counts when INTO pin // is high. ET0 = 1; // Enable timer0 interrupts ET1 = 1; // Enable timer1 interrupts tempsegment = 1; // Initialize segment

Daisy_Start_Pulse = 0; // Pull P3.7 low

// Start Pulse Daisy_Start_Pulse = 1; Daisy_Start_Pulse = 0; //Toggle P3.7 to give start pulse // Set T0 to count the high period TR0 = 1; // Start timer0 running IT0 = 1; // Interrupt0 edge triggered

EX0 = 1; // Enable interrupt EA = 1; // Enable global interrupts for(;;) { if (tempsegment == 4) break; }

//CONFIGURE UART SCON = 0x52 ; // 8-bit, no parity, 1 stop bit TMOD = 0x20 ; // Configure timer1.. TH1 = 0xFD ; // ..for 9600baud.. TR1 = 1; // ..(assuming 11.0592MHz crystal)

//Convert variables to floats for calculation T1= temp_high0; T2= temp_low0; T3= temp_high1; T4= temp_low1; T5= temp_high2;

temp1=421-(751*(T1/(T2-T3))); temp2=421-(751*(T3/(T4-T5))); printf("Temp1 = %f\nTemp2 = %f\n",temp1,temp2); //Sends temperature result out UART

while (1); // END of program

}

// Delay routine void delay(int length) { while (length >=0) length--; }

Rev. B | Page 23 of 28

TMP05/TMP06

CONTINUOUSLY CONVERTING APPLICATION

This section provides an example of how to connect one TMP05 in continuously converting mode to a microchip PIC16F876 microcontroller. to the PIC16F876.

Figure 37 shows how to interface

FIRST TEMP

MEASUREMENT

SECOND TEMP

MEASUREMENT

TMP05 Program Code Example 2 shows how to

The

TIME

communicate from the microchip device to the TMP05. This code can also be used with other PICs by changing the include file for the part.

PIC16F876

PA. 0

TMP05

OUT

CONV/IN

Figure 37. Typical Continuously Converting Application Circuit

3.3V

0.1µF

GNDFUNC

TMP05 Program Code Example 2

//============================================================================================= // // Description : This program reads the temperature from a TMP05 part set up in continuously

// converting mode. // This code was written for a PIC16F876, but can be easily configured to function with other

// PICs by simply changing the include file for the part. // // Fosc = 4MHz // Compiled under CCS C compiler IDE version 3.4 // PWM output from TMP05 connected to PortA.0 of PIC16F876 // //============================================================================================ #include <16F876.h> // Insert header file for the particular PIC being used #device adc=8 #use delay(clock=4000000) #fuses NOWDT,XT, PUT, NOPROTECT, BROWNOUT, LVP

//_______________________________Wait for high function_____________________________________ void wait_for_high() { while(input(PIN_A0)) ; /* while high, wait for low */ while(!input(PIN_A0)); /* wait for high */ } //______________________________Wait for low function_______________________________________ void wait_for_low() { while(input(PIN_A0)); /* wait for high */ } //_______________________________Main begins here____________________________________________ void main(){ long int high_time,low_time,temp;

setup_adc_ports(NO_ANALOGS); setup_adc(ADC_OFF); setup_spi(FALSE);

setup_timer_1 ( T1_INTERNAL | T1_DIV_BY_2); //Sets up timer to overflow after 131.07ms

03340-039

Rev. B | Page 24 of 28

TMP05/TMP06

do{ wait_for_high(); set_timer1(0); //Reset timer wait_for_low(); high_time = get_timer1(); set_timer1(0); //Reset timer wait_for_high(); low_time = get_timer1();

temp = 421 – ((751 * high_time)/low_time)); //Temperature equation for the high state

//Temperature value stored in temp as a long int }while (TRUE); }

//conversion rate.

Rev. B | Page 25 of 28

TMP05/TMP06

OUTLINE DIMENSIONS

2.20

2.00

1.80

1.35

1.25

1.15

PIN 1

1.00

0.90

0.70

0.10 COPLANARITY

123

0.30

0.15

COMPLIANT TO JEDEC STANDARDS MO-203-AA

0.65 BSC

2.40

2.10

1.80

1.10

0.80

SEATING PLANE

0.40

0.10

0.22

0.08

0.46

0.36

0.26

Figure 38. 5-Lead Thin Shrink Small Outline Transistor Package [SC-70]

(KS-5)

Dimensions shown in millimeters

1.60 BSC

PIN 1

1.30

1.15

0.90

0.15 MAX

Figure 39. 5-Lead Small Outline Transistor Package [SOT-23]

2.90 BSC

123

COMPLIANT TO JEDEC STANDARDS MO-178-AA

1.90

BSC

0.50

0.30

0.95 BSC

2.80 BSC

1.45 MAX

SEATING PLANE

0.22

0.08

10°

5° 0°

(RJ-5)

Dimensions shown in millimeters

0.60

0.45

0.30

ORDERING GUIDE

Minimum

Model

Quantities/Reel

TMP05AKS-500RL7 500 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T8A TMP05AKS-REEL 10,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T8A TMP05AKS-REEL7 3,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T8A TMP05AKSZ-500RL73 500 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T8C TMP05AKSZ-REEL3 10,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T8C TMP05AKSZ-REEL73 3,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T8C TMP05ART-500RL7 500 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T8A TMP05ART-REEL 10,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T8A TMP05ART-REEL7 3,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T8A TMP05ARTZ-500RL73 500 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T8C TMP05ARTZ-REEL3 10,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T8C TMP05ARTZ-REEL73 3,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T8C TMP05BKS-500RL7 500 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T8B TMP05BKS-REEL 10,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T8B TMP05BKS-REEL7 3,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T8B TMP05BKSZ-500RL73 500 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T8D TMP05BKSZ-REEL3 10,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T8D TMP05BKSZ-REEL73 3,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T8D TMP05BRT-500RL7 500 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T8B TMP05BRT-REEL 10,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T8B TMP05BRT-REEL7 3,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T8B TMP05BRTZ-500RL73 500 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T8D TMP05BRTZ-REEL3 10,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T8D TMP05BRTZ-REEL73 3,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T8D

Temperature

Range

Temperature Accuracy

Package Description

Package Option

Branding

Rev. B | Page 26 of 28

TMP05/TMP06

Minimum

Model

Quantities/Reel

TMP06AKS-500RL7 500 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T9A TMP06AKS-REEL 10,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T9A TMP06AKS-REEL7 3,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T9A TMP06AKSZ-500RL73 500 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T9C TMP06AKSZ-REEL3 10,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T9C TMP06AKSZ-REEL73 3,000 –40°C to +150°C ±2°C 5-Lead SC-70 KS-5 T9C TMP06ART-500RL7 500 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T9A TMP06ART-REEL 10,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T9A TMP06ART-REEL7 3,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T9A TMP06ARTZ-500RL73 500 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T9C TMP06ARTZ-REEL3 10,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T9C TMP06ARTZ-REEL73 3,000 –40°C to +150°C ±2°C 5-Lead SOT-23 RJ-5 T9C TMP06BKS-500RL7 500 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T9B TMP06BKS-REEL 10,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T9B TMP06BKS-REEL7 3,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T9B TMP06BKSZ-500RL73 500 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T9D TMP06BKSZ-REEL3 10,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T9D TMP06BKSZ-REEL73 3,000 –40°C to +150°C ±1°C 5-Lead SC-70 KS-5 T9D TMP06BRT-500RL7 500 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T9B TMP06BRT-REEL 10,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T9B TMP06BRT-REEL7 3,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T9B TMP06BRTZ-500RL73 500 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T9D TMP06BRTZ-REEL3 10,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T9D TMP06BRTZ-REEL73 3,000 –40°C to +150°C ±1°C 5-Lead SOT-23 RJ-5 T9D

It is not recommended to operate the device at temperatures above 125°C for more than a total of 5% (5,000 hours) of the lifetime of the device. Any exposure beyond

this limit affects device reliability.

A-grade and B-grade temperature accuracy is over the 0°C to 70°C temperature range.

Z = Pb-free part.

Temperature

Range

Temperature Accuracy

Package Description

Package Option

Branding

Rev. B | Page 27 of 28

TMP05/TMP06

NOTES

Rev. B | Page 28 of 28

ANALOG DEVICES TMP05 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

APPLICATIONS

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

REVISION HISTORY

SPECIFICATIONS

TMP05A/TMP06A SPECIFICATIONS

TMP05B/TMP06B SPECIFICATIONS

TIMING CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

ESD CAUTION

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

TYPICAL PERFORMANCE CHARACTERISTICS

THEORY OF OPERATION

CIRCUIT INFORMATION

CONVERTER DETAILS

FUNCTIONAL DESCRIPTION

OPERATING MODES

TMP05 OUTPUT

TMP06 OUTPUT

APPLICATION HINTS

THERMAL RESPONSE TIME

SELF-HEATING EFFECTS

SUPPLY DECOUPLING

LAYOUT CONSIDERATIONS

DAISY-CHAIN APPLICATION

TEMPERATURE MONITORING

CONTINUOUSLY CONVERTING APPLICATION

OUTLINE DIMENSIONS

ORDERING GUIDE