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TMP37FS View Datasheet(PDF) - Analog Devices

Part Name
Description
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TMP37FS
ADI
Analog Devices ADI
TMP37FS Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
10F/0.1F
TMP35/TMP36/TMP37
+3V
R1
50k
R2
50k
VS
VOUT
TMP36
GND
C1
10F
ELEMENT
R2
R4
R5
R6
TMP36
258.6k
10k
47.7k
10k
NC
10F
R3
R4
0.1F
8
2
OP193
R5
3
6
R6
4
8
1
5
2
ADM660
6
4
3
7
–3V
10F
NC
VOUT @ 1mV/ ؇F
–40؇F Յ TA Յ +257 ؇F
Figure 5c. TMP36 Fahrenheit Thermometer Version 2
The circuit in Figure 6b illustrates how a pair of TMP3x sensors
can be used with an OP193 configured as a difference amplifier
to read the difference in temperature between two locations. In
these applications, it is always possible that one temperature
sensor would be reading a temperature below that of the other
sensor. To accommodate this condition, the output of the OP193
is offset to a voltage at one-half the supply via R5 and R6. Thus,
the output voltage of the circuit is measured relative to this point,
TMP3x
R1
300k
2.7V < +VS < 5.5V
0.1F
7
2
1
OP193
3
4
VTEMP( AVG)
@ 10mV/ ؇C FOR TMP35/36
@ 20mV/ ؇C FOR TMP35/36
R5
100k
TMP3x
R2
300k
TMP3x
R3
300k
R4
7.5k
R6
7.5k
FOR R1 = R2 = R3 = R;
VTEMP(AVG) = 1 (TMP3x1 + TMP3x2 + TMP3x3)
3
R5 = R1
3
R4 = R6
as shown in the figure. Using the TMP36, the output voltage of
the circuit is scaled by 10 mV/°C. To minimize error in the differ-
ence between the two measured temperatures, a common, readily
available thin-film resistor network is used for R1–R4.
2.7V < VS < 5.5V
0.1F
0.1F
TMP36
@ T1
TMP36
@ T2
R1*
R2*
R8
25k
0.1F
R3*
R9
25k
7
2
OP193
6
3
4
CENTERED AT
R4*
1F
VOUT
R7
100k
0 Յ TA Յ 125 C
R5
100k
R6
100k
VOUT = T2 – T1 @ 10mV/ ؇C
CENTERED AT
VS
2
*R1–R4, CADDOCK T914–100k–100, OR EQUIVALENT
Figure 6a. Configuring Multiple Sensors for Average
Temperature Measurements
Figure 6b. Configuring Multiple Sensors for Differential
Temperature Measurements
REV. C
–9–
 

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