Low Voltage Temperature Sensors
TMP35/TMP36/TMP37
FEATURES
FUNCTIONAL BLOCK DIAGRAM
+V (2.7V TO 5.5V)
S
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)
TMP35/
TMP36/
TMP37
SHUTDOWN
V
OUT
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
Figure 1.
PIN CONFIGURATIONS
Qualified for automotive applications
V
GND
1
2
3
5
4
OUT
APPLICATIONS
TOP VIEW
(Not to Scale)
+V
S
Environmental control systems
Thermal protection
NC
SHUTDOWN
Industrial process control
Fire alarms
Power system monitors
CPU thermal management
NC = NO CONNECT
Figure 2. RJ-5 (SOT-23)
V
1
2
3
4
8
7
6
5
+V
S
OUT
NC
GENERAL DESCRIPTION
NC
TOP VIEW
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 ±±1C at +251C
and ±21C over the −401C to +±251C temperature range.
(Not to Scale)
NC
NC
SHUTDOWN
GND
NC = NO CONNECT
Figure 3. R-8 (SOIC_N)
2
1
3
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.±1C in still air. In addition, a
shutdown function is provided to cut the supply current to less
than 0.5 μA.
BOTTOM VIEW
(Not to Scale)
PIN 1, +V ; PIN 2, V
; PIN 3, GND
OUT
S
Figure 4. T-3 (TO-92)
The TMP35 is functionally compatible with the LM35/LM45
and provides a 250 mV output at 251C. The TMP35 reads
temperatures from ±01C to ±251C. The TMP36 is specified from
−401C to +±251C, provides a 750 mV output at 251C, and
operates to ±251C 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 ±0 mV/1C.
The TMP37 is intended for applications over the range of 51C
to ±001C and provides an output scale factor of 20 mV/1C. The
TMP37 provides a 500 mV output at 251C. Operation extends
to ±501C 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. F
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