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PDF TMP36 Data sheet ( Hoja de datos )
| Número de pieza | TMP36 | |
| Descripción | Low Voltage Temperature Sensors | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Low Voltage Temperature Sensors
TMP35/TMP36/TMP37
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
Qualified for automotive applications
APPLICATIONS
Environmental control systems
Thermal protection
Industrial process control
Fire alarms
Power system monitors
CPU thermal management
GENERAL DESCRIPTION
The TMP35/TMP36/TMP37 are low voltage, precision centi-
grade temperature sensors. They provide a voltage output that
is linearly proportional to the Celsius (centigrade) temperature.
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 ADCs. All three devices are
intended for single-supply operation from 2.7 V to 5.5 V maxi-
mum. 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.
FUNCTIONAL BLOCK DIAGRAM
+VS (2.7V TO 5.5V)
SHUTDOWN
TMP35/
TMP36/
TMP37
VOUT
Figure 1.
PIN CONFIGURATIONS
VOUT 1
5 GND
+VS 2 TOP VIEW
(Not to Scale)
NC 3
4 SHUTDOWN
NC = NO CONNECT
Figure 2. RJ-5 (SOT-23)
VOUT 1
8 +VS
NC 2
7 NC
TOP VIEW
NC 3 (Not to Scale) 6 NC
GND 4
5 SHUTDOWN
NC = NO CONNECT
Figure 3. R-8 (SOIC_N)
123
BOTTOM VIEW
(Not to Scale)
PIN 1, +VS; PIN 2, VOUT; PIN 3, GND
Figure 4. T-3 (TO-92)
The TMP37 is intended for applications over the range of 5°C
to 100°C and 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, 8-lead SOIC_N, and 5-lead SOT-23 surface-mount
packages.
Rev. H
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1996–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
50
40
30
20
10
0
–50 0
50 100
TEMPERATURE (°C)
Figure 5. Load Regulation vs. Temperature (m°C/µA)
150
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50
a. TMP35
b. TMP36
c. TMP37
+VS = 3V
–25 0
25 50 75
TEMPERATURE (°C)
c
b
a
100 125
Figure 6. Output Voltage vs. Temperature
5
4
3
2
a a. MAXIMUM LIMIT (G GRADE)
b. TYPICAL ACCURACY ERROR
c. MINIMUM LIMIT (G GRADE)
1
0
–1
b
–2
–3
–4
c
–5
0
20 40 60 80 100 120 140
TEMPERATURE (°C)
Figure 7. Accuracy Error vs. Temperature
TMP35/TMP36/TMP37
0.4
+VS = 3V TO 5.5V, NO LOAD
0.3
0.2
0.1
0
–50
–25
0 25 50 75
TEMPERATURE (°C)
100
Figure 8. Power Supply Rejection vs. Temperature
125
100.000
31.600
10.000
3.160
1.000
0.320
0.100
0.032
0.010
20
100 1k 10k
FREQUENCY (Hz)
Figure 9. Power Supply Rejection vs. Frequency
100k
5
MINIMUM SUPPLY VOLTAGE REQUIRED TO MEET
4 DATA SHEET SPECIFICATION
NO LOAD
3
b
2
a
1
a. TMP35/TMP36
b. TMP37
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100
Figure 10. Minimum Supply Voltage vs. Temperature
125
Rev. H | Page 5 of 19
5 Page 
Data Sheet
The same circuit principles can be applied to the TMP36, but
because of the inherent offset of the TMP36, the circuit uses only
two resistors, as shown in Figure 26. In this circuit, the output
voltage transfer characteristic is 1 mV/°F but is referenced to
the common ground of the circuit; however, there is a 58 mV
(58°F) offset in the output voltage. For example, the output
voltage of the circuit reads 18 mV if the TMP36 is placed in a
−40°F ambient environment and 315 mV at +257°F.
+VS
0.1µF
+VS
TMP36 VOUT
GND
R1
45.3kΩ
R2 VOUT @ 1mV/°F – 58°F
10kΩ
TMP35/TMP36/TMP37
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/°F, without offset. This is accom-
plished through an ADM660, which is a supply voltage inverter.
The 3 V supply is inverted and applied to the V− terminal of the
OP193. Thus, for a temperature range between −40°F and +257°F,
the output of the circuit reads −40 mV to +257 mV. A general
expression for the transfer equation of the circuit is given by
VOUT
=
R6
R5 + R6
1 +
R4
R3
(TMP36) −
R4
R3
VS
2
VOUT @ –40°F = 18mV
VOUT @ +257°F = 315mV
Figure 26. TMP36 Fahrenheit Thermometer Version 1
+3V
+
10µF/0.1µF
R1
50kΩ
R2
50kΩ
+VS
TMP36 VOUT
GND
C1 +
10µF
ELEMENT
R3
R4
R5
R6
VALUE
258.6kΩ
10kΩ
47.7kΩ
10kΩ
NC
+
10µF
R3 R4
0.1µF
7
2
–
OP193
R5 3 6
+
R6 4
8
15
2
ADM660
6
4
37
–3V
+ 10µF
NC
Figure 27. TMP36 Fahrenheit Thermometer Version 2
VOUT @ 1mV/°F
–40°F ≤ TA ≤ +257°F
Rev. H | Page 11 of 19
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet TMP36.PDF ] | |
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