參數(shù)資料
型號: TMP37GT9
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: 低電壓溫度傳感器
文件頁數(shù): 9/16頁
文件大?。?/td> 476K
代理商: TMP37GT9
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
相關(guān)PDF資料
PDF描述
TMP35 Low Voltage Temperature Sensors
TMP35FS Low Voltage Temperature Sensors
TMP35GS Low Voltage Temperature Sensors
TMP36 Low Voltage Temperature Sensors
TMP36FS Low Voltage Temperature Sensors
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