TMP36 Analog Devices, TMP36 Datasheet

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TMP36

Manufacturer Part Number
TMP36
Description
Low Voltage Temperature Sensor, Vo=750 mV at + 25 Deg C
Manufacturer
Analog Devices
Datasheet

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FEATURES
Low voltage operation (2.7 V to 5.5 V)
Calibrated directly in °C
10 mV/°C scale factor (20 mV/°C on TMP37)
±2°C accuracy over temperature (typ)
±0.5°C linearity (typ)
Stable with large capacitive loads
Specified −40°C to +125°C, operation to +150°C
Less than 50 µA quiescent current
Shutdown current 0.5 µA max
Low self-heating
APPLICATIONS
Environmental control systems
Thermal protection
Industrial process control
Fire alarms
Power system monitors
CPU thermal management
GENERAL DESCRIPTION
The TMP35, TMP36, and TMP37 are low voltage, precision,
centigrade temperature sensors. They provide a voltage output
that is linearly proportional to the Celsius (centigrade) tempera-
ture. The TMP35/TMP36/TMP37 do not require any external
calibration to provide typical accuracies of ±1°C at +25°C and
±2°C over the −40°C to +125°C temperature range.
The low output impedance of the TMP35/TMP36/TMP37 and
its linear output and precise calibration simplify interfacing to
temperature control circuitry and A/D converters. All three
devices are intended for single-supply operation from 2.7 V to
5.5 V maximum. The supply current runs well below 50 µA,
providing very low self-heating—less than 0.1°C in still air. In
addition, a shutdown function is provided to cut the supply
current to less than 0.5 µA.
The TMP35 is functionally compatible with the LM35/LM45
and provides a 250 mV output at 25°C. The TMP35 reads
temperatures from 10°C to 125°C. The TMP36 is specified from
−40°C to +125°C, provides a 750 mV output at 25°C, and
operates to 125°C from a single 2.7 V supply. The TMP36 is
functionally compatible with the LM50. Both the TMP35 and
TMP36 have an output scale factor of 10 mV/°C. The TMP37 is
intended for applications over the range 5°C to 100°C and
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other 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.
Low Voltage Temperature Sensors
provides an output scale factor of 20 mV/°C. The TMP37
provides a 500 mV output at 25°C. Operation extends to 150°C
with reduced accuracy for all devices when operating from a
5 V supply.
The TMP35/TMP36/TMP37 are available in low cost 3-lead
TO-92, SOIC-8, and 5-lead SOT-23 surface-mount packages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
FUNCTIONAL BLOCK DIAGRAM
SHUTDOWN
V
V
GND
+V
OUT
OUT
NC
NC
NC
PIN 1, +V
PIN CONFIGURATIONS
S
TMP35/TMP36/TMP37
1
2
3
NC = NO CONNECT
NC = NO CONNECT
1
2
3
4
© 2005 Analog Devices, Inc. All rights reserved.
Figure 2. RT-5 (SOT-23)
(Not to Scale)
(Not to Scale)
Figure 3. RN-8 (SOIC)
TOP VIEW
TOP VIEW
S
BOTTOM VIEW
; PIN 2, V
(Not to Scale)
Figure 4. TO-92
1
V
S
Figure 1.
(2.7V TO 5.5V)
TMP35/
TMP36/
TMP37
2
OUT
3
5
4
8
7
6
5
; PIN 3, GND
SHUTDOWN
NC
NC
SHUTDOWN
GND
+V
S
V
OUT
www.analog.com

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TMP36 Summary of contents

Page 1

... V supply. The TMP36 is functionally compatible with the LM50. Both the TMP35 and TMP36 have an output scale factor of 10 mV/°C. The TMP37 is intended for applications over the range 5°C to 100°C and Rev. D Information furnished by Analog Devices is believed to be accurate and reliable ...

Page 2

... TMP35/TMP36/TMP37 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Typical Performance Characteristics ............................................. 5 Functional Description .................................................................... 8 Applications....................................................................................... 9 Shutdown Operation.................................................................... 9 Mounting Considerations ........................................................... 9 Thermal Environment Effects .................................................... 9 Basic Temperature Sensor Connections.................................. 10 Fahrenheit Thermometers ........................................................ 10 Average and Differential Temperature Measurement ........... 12 REVISION HISTORY 3/05—Rev Rev. D Updated Format..................................................................Universal Changes to Specifications ...

Page 3

... S A Table 1. 1 Parameter Symbol ACCURACY TMP35/TMP36/TMP37F TMP35/TMP36/TMP37G TMP35/TMP36/TMP37F TMP35/TMP36/TMP37G Scale Factor, TMP35 Scale Factor, TMP36 Scale Factor, TMP37 Load Regulation Power Supply Rejection Ratio PSRR Linearity Long-Term Stability SHUTDOWN Logic High Input Voltage V IH Logic Low Input Voltage V ...

Page 4

... TMP35/TMP36/TMP37 ABSOLUTE MAXIMUM RATINGS Table Parameter Rating Supply Voltage 7 V Shutdown Pin GND ≤ SHUTDOWN ≤ V Output Pin GND ≤ V Operating Temperature Range −55°C to +150°C Die Junction Temperature 175°C Storage Temperature Range −65°C to +160°C IR Reflow Soldering Peak Temperature 220° ...

Page 5

... TYPICAL PERFORMANCE CHARACTERISTICS – TEMPERATURE (°C) Figure 5. Load Regulation vs. Temperature (m°C/µA) 2.0 a. TMP35 b. TMP36 1.8 c. TMP37 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 –50 – TEMPERATURE (°C) Figure 6. Output Voltage vs. Temperature MAXIMUM LIMIT (G GRADE TYPICAL ACCURACY ERROR c. MINIMUM LIMIT (G GRADE) ...

Page 6

... TMP35/TMP36/TMP37 LOAD –50 – TEMPERATURE (°C) Figure 11. Supply Current vs. Temperature 25°C, NO LOAD SUPPLY VOLTAGE (V) Figure 12. Supply Current vs. Supply Voltage LOAD –50 –25 ...

Page 7

... TMP35 SOIC SOLDERED TO 0.5" × 0.3" Cu PCB b. TMP36 SOIC SOLDERED TO 0.6" × 0.4" Cu PCB 30 c. TMP35 TO-92 IN SOCKET SOLDERED TO 1" × 0.4" Cu PCB 100 200 300 400 TIME (s) Figure 17. Thermal Response Time in Still Air 140 a. TMP35 SOIC SOLDERED TO 0.5" ...

Page 8

... V S SHDN are not equal by the BE V OUT BE GND Table 3. TMP3x Output Characteristics Sensor TMP35 TMP36 TMP37 Rev Page 25µ 10X R3 7.5µ Figure 22. Temperature Sensor Simplified Equivalent Circuit ...

Page 9

... For example, the thermal time constant of a TMP35 SOIC package sensor mounted onto a 0.5" by 0.3" PCB is less than 50 sec in air, whereas in a stirred oil bath, the time constant is less than 3 sec. Rev Page TMP35/TMP36/TMP37 θ θ ...

Page 10

... TMP35, and from 41°F to 212°F using the TMP37 S with an output characteristic of 2 mV/°F. This particular approach does not lend itself to the TMP36 because of its inherent 0.5 V output offset. The circuit is constructed with an AD589, a 1.23 V voltage reference, and four resistors whose values for each sensor are shown in the table in Figure 25 ...

Page 11

... At the expense of additional circuitry, the offset produced by the circuit in Figure 26 can be avoided by using the circuit in Figure 27. In this circuit, the output of the TMP36 is conditioned by a single supply, micropower op amp, the OP193. Although the entire circuit operates from a single 3 V supply, the output voltage of the circuit reads the temperature directly, with a transfer characteristic of 1 mV/° ...

Page 12

... R5 and R6. Thus, the output voltage of the circuit is measured relative to this point, as shown in the figure. Using the TMP36, the output voltage of the circuit is scaled by 10 mV/°C. To minimize the error in the difference between the two measured temperatures, a common, readily available thin-film resistor network is used for ...

Page 13

... 1000pF 100kΩ 0.1µ 16kΩ 6 REF191 + R4 1µF 10kΩ CMP402 4 Figure 30. Pentium Overtemperature Interrupt Generator Rev Page TMP35/TMP36/TMP37 ( ) ⎛ ⎞ ⎜ ⎟ V HYS LOGIC SWING , CMP402 ⎝ ⎠ 1MΩ 0.1µ – ...

Page 14

... TMP35/TMP36/TMP37 THERMOCOUPLE SIGNAL CONDITIONING WITH COLD-JUNCTION COMPENSATION The circuit in Figure 31 conditions the output of a Type K thermocouple, while providing cold-junction compensation for temperatures between 0°C and 250°C. The circuit operates from single 3 5.5 V supplies and is designed to produce an output voltage transfer characteristic of 10 mV/°C. ...

Page 15

... The loop supply voltage compliance of the circuit is limited by the maximum applied input voltage to the REF193 from Rev Page TMP35/TMP36/TMP37 × × ⎛ ⎞ ⎛ ...

Page 16

... OFFSET 100kΩ R OFF1 R OFF2 470Ω 10Ω SENSOR R ( TMP35 11.8kΩ + 500Ω 1.7nF TMP36 16.2kΩ + 500Ω 1.8nF TMP37 18.2kΩ + 1kΩ 2.1nF Figure 34. Temperature-to-Frequency Converter 5kΩ OUT 2 f (min), = 0Hz A OUT AND C – ...

Page 17

... Figure 34 illustrates the circuit element values for each of the three sensors. The nominal offset voltage required for 0 Hz output from the TMP35 is 50 mV; for the TMP36 and TMP37, the offset voltage required is 100 mV. For the circuit values shown, the output frequency transfer characteristic of the circuit was set at 50 Hz/° ...

Page 18

... TMP35/TMP36/TMP37 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2440) 4.00 (0.1574) 5.80 (0.2284) 3.80 (0.1497 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 0.25 (0.0098) 0.10 (0.0040) 0.51 (0.0201) COPLANARITY 0.25 (0.0098) 0.31 (0.0122) SEATING 0.10 0.17 (0.0067) PLANE COMPLIANT TO JEDEC STANDARDS MS-012AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN Figure 36 ...

Page 19

... TMP36FS-REEL ±2.0 1 TMP36FSZ ±2.0 1 TMP36FSZ-REEL ±2.0 TMP36GRT-REEL7 ±3.0 1 TMP36GRTZ-REEL7 ±3.0 TMP36GS ±3.0 TMP36GS-REEL ±3.0 TMP36GS-REEL7 ±3.0 1 TMP36GSZ ±3.0 1 TMP36GSZ-REEL ±3.0 1 TMP36GSZ-REEL7 ±3.0 TMP36GT9 ±3.0 TMP36CSURF TMP37FS ±2.0 TMP37FS-REEL ±2.0 TMP37FT9 ±2.0 TMP37FT9-REEL ±2.0 TMP37GRT-REEL7 ±3.0 TMP37GS ±3.0 TMP37GS-REEL ±3.0 TMP37GSZ 1 ± ...

Page 20

... TMP35/TMP36/TMP37 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00337–0–3/05(D) Rev Page ...

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