參數(shù)資料
型號(hào): TMP37FT9
廠商: ANALOG DEVICES INC
元件分類: 溫度/濕度傳感器
英文描述: Low Voltage Temperature Sensors
中文描述: ANALOG TEMP SENSOR-VOLTAGE, 0.1-2V, 4Cel, RECTANGULAR, THROUGH HOLE MOUNT
封裝: PLASTIC, TO-226-AA, TO-92, 3 PIN
文件頁(yè)數(shù): 9/16頁(yè)
文件大?。?/td> 476K
代理商: TMP37FT9
REV. C
TMP35/TMP36/TMP37
–9–
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,
OP193
0.1 F
2
3
4
1
7
V
@ 10mV/ C FOR TMP35/36
@ 20mV/ C FOR TMP35/36
2.7V < +V
S
< 5.5V
FOR R1 = R2 = R3 = R;
V
TEMP(AVG)
= 1 (TMP3x
1
+ TMP3x
2
+ TMP3x
3
)
3
R1
3
R4 = R6
R1
300k
R2
300k
R3
300k
TMP3x
TMP3x
TMP3x
R4
7.5k
R6
7.5k
R5
100k
R5 =
Figure 6a. Configuring Multiple Sensors for Average
Temperature Measurements
ELEMENT
R2
R4
R5
R6
TMP36
V
OUT
R1
50k
V
S
ADM660
TMP36
OP193
R2
50k
R3
R4
+3V
C1
10 F
R5
0.1 F
10 F
–3V
10 F/0.1 F
GND
NC
10 F
NC
R6
1
2
3
4
5
6
7
2
3
4
6
8
8
V
OUT
@ 1mV/ F
–40 F T
A
+257 F
258.6k
10k
47.7k
10k
Figure 5c. TMP36 Fahrenheit Thermometer Version 2
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.
TMP36
@ T1
0.1 F
0.1 F
2
3
4
6
7
OP193
1 F
V
OUT
R3
*
R4
*
R2
*
R1
*
2.7V < V
S
< 5.5V
TMP36
@ T2
R5
100k
R6
100k
V
OUT
= T2 – T1 @ 10mV/ C
V
S
2
*
R1–R4, CADDOCK T914–100k–100, OR EQUIVALENT
0.1 F
R7
100k
R8
25k
R9
25k
0 T
A
125 C
CENTERED AT
CENTERED AT
Figure 6b. Configuring Multiple Sensors for Differential
Temperature Measurements
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