Analog Devices TMP05 6 Datasheet

±0.5°C Accurate PWM

Temperature Sensor in 5-Lead SC-70

FEATURES

Modulated serial digital output, proportional to

temperature
±0.5°C accuracy at 25°C
±1.0°C accuracy from 25°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

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
higher 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.

) of the PWM remains static over all temperatures,

H

) varies. The B Grade version offers a

L

TMP05/TMP06

FUNCTIONAL BLOCK DIAGRAM

V

DD

5

TMP05/TMP06

TEMPERATURE

CONV/IN

2

SENSOR

REFERENCE

CLK AND

TIMING

GENERATION

Σ-∆

CORE

4

GND

Figure 1.

The TMP05/TMP06 have three modes of operation: continu­ously converting mode, daisy-chain mode, and one shot mode.
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 with
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 3.0 V to 5.5 V.

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

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

decoupling capacitor to achieve this accuracy.

5. 0.025°C temperature resolution.

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

the average power consumption to 102 µW at 1 SPS.

AVERAGING

BLOCK /

COUNTER

OUTPUT

CONTROL

1

3

OUT

FUNC

03340-0-001

Rev. 0

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infringements of patents or other rights of third parties that may result from its use.
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TMP05/TMP06

TABLE OF CONTENTS

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

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

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

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

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

REVISION HISTORY

8/04—Revision 0: Initial Version

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

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

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

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

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

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

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

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

Continuously Converting Application.................................... 23

Outline Dimensions....................................................................... 25

Ordering Guide .......................................................................... 25

Rev. 0 | 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

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 = 3.3 V (3.0 V − 3.6 V) ±2 °C TA = 0°C to 70°C, VDD = 3.0 V − 3.6 V
±3 °C TA = –40°C to +70°C, VDD = 3.0 V − 3.6 V
±4 °C TA = –40°C to +125°C, VDD = 3.0 V − 3.6 V
±5

1

°C TA = –40°C to +150°C, VDD = 3.0 V − 3.6 V
Accuracy @ VDD = 5 V (4.5 V − 5.5 V) 1.5 °C TA = 0°C to 125°C, VDD = 4.5 V − 5.5 V
Temperature Resolution 0.025 °C/5 µs Step size for every 5 µs on T
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 − 3.6 V) 1.5 °C TA = –40°C to +150°C
Accuracy @ VDD = 5 V (4.5 V − 5.5 V) 1.5 °C TA = 0°C to 125°C
Temperature Resolution 0.1 °C/5 µs Step size for every 5 µs on T
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 − 3.6 V) 1.5 °C TA = –40°C to +150°C
Accuracy @ VDD = 5 V (4.5 V − 5.5 V) 1.5 °C TA = 0°C to 125°C
Temperature Resolution 0.1 °C/5 µs Step size for every 5 µs on T
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

SUPPLIES

Supply Voltage 3 5.5 V
Supply Current

Normal Mode2 @ 3.3 V 370 550 µA Nominal conversion rate
Normal Mode2 @ 5.0 V 425 650 µA Nominal conversion rate
Quiescent2 @ 3.3 V 3 6 µA Device not converting, output is high
Quiescent2 @ 5.0 V 5.5 10 µA Device not converting, output is high
One Shot Mode @ 1 SPS 30.9 µA

Average current @ V
conversion rate @ 25°C

37.38 µA

Average current @ V
conversion rate @ 25°C

Power Dissipation 803.33 µW

= 3.3 V, continuously converting at

V

DD

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

to T

MIN

= 3.3 V, nominal

DD

= 5.0 V, nominal

DD

L

L

L

MAX

, VDD =

= 3.3 V,

DD

= 5.0 V,

DD

Rev. 0 | Page 3 of 28

TMP05/TMP06

Parameter Min Typ Max Unit Test Conditions/Comments

TMP05 OUTPUT (PUSH-PULL)

Output High Voltage, V
Output Low Voltage, V
Output High Current, I
Pin Capacitance 10 pF
Rise Time,5 t
Fall Time,5 t

LH

HL

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

TMP06 OUTPUT (OPEN DRAIN)3

Output Low Voltage, V
Output Low Voltage, V
Pin Capacitance 10 pF
High Output Leakage Current, I
Device Turn-On Time 20 ms
Fall Time,6 t

HL

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

DIGITAL INPUTS3

Input Current ±1 µA VIN = 0 V to V
Input Low Voltage, V
Input High Voltage, V
Pin Capacitance 3 10 pF

1

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.

2

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

3

Guaranteed by design and characterization, not production tested.

4

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.

5

Test load circuit is 100 pF to GND.

6

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

OL

OUT

3

OH

4

V

− 0.3 V IOH = 800 µA

DD

0.4 V IOL = 800 µA
2 mA Typ VOH = 3.17 V with VDD = 3.3 V

50 ns
50 ns

OL

OL

OH

0.4 V IOL = 1.6 mA

1.2 V IOL = 5.0 mA

0.1 5 µA PWM

= 5.5 V

OUT

30 ns

DD

IL

IH

0.3 × V

0.7 × VDD V

V

DD

Rev. 0 | 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

3.0 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 (3.0 V – 3.6 V) ±0.5 ±1 °C TA = 25°C to 70°C, VDD = 3.0 V − 3.6 V

±1.25 °C TA = 0°C to 70°C, VDD = 3.0 V − 3.6 V
±1.5 °C TA = –40°C to +70°C, VDD = 3.0 V − 3.6 V
±2 °C TA = –40°C to +100°C, VDD = 3.0 V − 3.6 V
±2.5 °C TA = –40°C to +125°C, VDD = 3.0 V − 3.6 V
±3

2

°C TA = –40°C to +150°C, VDD = 3.0 V − 3.6 V
Accuracy @ VDD = 5.0 V (4.5 V – 5.5 V) 1.5 °C TA = 0°C to 125°C, VDD = 4.5 V − 5.5 V
Temperature Resolution 0.025 °C/5 µs Step size for every 5 µs on T
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 – 3.6 V) ±1.5 °C TA = –40°C to +150°C
Accuracy @ VDD = 5.0 V (4.5 V – 5.5 V) ±1.5 °C TA = 0°C to 125°C
Temperature Resolution 0.1 °C/5 µs Step size for every 5 µs on T
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 – 3.6 V) ±1.5 °C TA = –40°C to +150°C
Accuracy @ VDD = 5 V (4.5 V – 5.5 V) ±1.5 °C TA = 0°C to 125°C
Temperature Resolution 0.1 °C/5 µs Step size for every 5 µs on T
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

SUPPLIES

Supply Voltage 3 5.5 V
Supply Current

Normal Mode3 @ 3.3 V 370 550 µA Nominal conversion rate
Normal Mode3 @ 5.0 V 425 650 µA Nominal conversion rate
Quiescent3 @ 3.3 V 3 6 µA Device not converting, output is high
Quiescent3 @ 5.0 V 5.5 10 µA Device not converting, output is high
One Shot Mode @ 1 SPS 30.9 µA

Average current @ V
conversion rate @ 25°C

37.38 µA

Average current @ V
conversion rate @ 25°C

Power Dissipation 803.33 µW

= 3.3 V, continuously converting at

V

DD

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

to T

MIN

= 3.3 V, nominal

DD

= 5.0 V, nominal

DD

MAX

L

L

L

, VDD =

= 3.3 V,

DD

= 5.0 V,

DD

Rev. 0 | Page 5 of 28

TMP05/TMP06

Parameter Min Typ Max Unit Test Conditions/Comments

TMP05 OUTPUT (PUSH-PULL)

Output High Voltage, V
Output Low Voltage, V
Output High Current, I
Pin Capacitance 10 pF
Rise Time,6 t
Fall Time,6 t

LH

HL

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

TMP06 OUTPUT (OPEN DRAIN)4

Output Low Voltage, V
Output Low Voltage, V
Pin Capacitance 10 pF
High Output Leakage Current, I
Device Turn-On Time 20 ms
Fall Time,7 t

HL

DIGITAL INPUTS4

Input Current ±1 µA VIN = 0 V to V
Input Low Voltage, V
Input High Voltage, V
Pin Capacitance 3 10 pF

1

The accuracy specifications for 3.0 V to 3.6 V supply range are specified to 3-sigma performance. See . Figure 22

2

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.

3

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

4

Guaranteed by design and characterization, not production tested.

5

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.

6

Test load circuit is 100 pF to GND.

7

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

OL

OUT

4

OH

5

VDD − 0.3 V IOH = 800 µA

0.4 V IOL = 800 µA
2 mA Typ VOH = 3.17 V with VDD = 3.3 V

50 ns
50 ns

OL

OL

OH

0.4 V IOL = 1.6 mA

1.2 V IOL = 5.0 mA

0.1 5 µA PWM

OUT

= 5.5 V

30 ns

DD

IL

IH

0.3 × V

0.7 × VDD V

V

DD

Rev. 0 | Page 6 of 28

TMP05/TMP06

TIMING CHARACTERISTICS

TA = T
Guaranteed by design and characterization, not production tested.

Ta bl e 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

1

t

3

1

t

4

2

t

4

t5 25 µs max Daisy-chain start pulse width

1

Test load circuit is 100 pF to GND.

2

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

MIN

to T

, VDD = 3.0 V to 5.5 V, unless otherwise noted.

MAX

50 ns typ TMP05 output rise time
50 ns typ TMP05 output fall time
30 ns typ TMP06 output fall time

T

T

H

L

t

3

90%10%

t

4

90% 10%

03340-0-002

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

START PULSE

t

5

03340-0-003

Figure 3. Daisy- Chain Start Timing

Rev. 0 | 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

1

–40°C to +150°C
Storage Temperature Range –65°C to +160°C
Maximum Junction Temperature, T

JMAX

150°C
5-Lead SOT-23

Power Dissipation

2

W

= (TJ max – T

MAX

3

)/θ

A

JA

Thermal Impedance4

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

5-Lead SC-70

Power Dissipation2 W

= (TJ max – T

MAX

3

)/θ

A

JA

Thermal Impedance4

θJA, Junction-to-Ambient 207.5°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 s to 20 s
Ramp-Up Rate 2°C/s to 3°C/s
Ramp-Down Rate –6°C/s

1

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.

2

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 for a
plot of maximum power dissipation versus ambient temperature (T

3

TA = ambient temperature.

4

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.

4
).

A

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.

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

MAXIMUM POWER DISSIPATION (W)

0.1

0

–40 –20 0 20 40 60 80 100 120 140

SC-70

SOT-23

TEMPERATURE (°C)

Figure 4. Maximum Power Dissipation vs. Temperature

03340-0-004

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. 0 | Page 8 of 28

TMP05/TMP06

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

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. Use of a decoupling capacitor of 0.1 µF as close as possible to this pin is

strongly recommended.

1

OUT

CONV/IN

FUNC

TMP05/

TMP06

2

TOP VIEW

(Not to Scale)

3

Figure 5. Pin Configuration

V

5

DD

4

GND

03340-0-005

Rev. 0 | Page 9 of 28