Datasheet

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SBOS282B − DECEMBER 2003 − REVISED FEBRUARY 2005
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10
V
IN
V
REF
R
1
R
2
±10V 5V 42.2kΩ 14.7kΩ
±5V 5V 20.8kΩ 19.6kΩ
0V to 10V 5V 20.8kΩ 5.11kΩ
0V to 5V 5V 10.5kΩ 10kΩ
Figure 4. Driving ADC
R
4
10k
Ω
R
3
6.8k
Ω
R
1
22k
Ω
TPS434 Thermopile
R
5
1.5M
Ω
+5V
R
7
10k
Ω
R
8
10k
Ω
R
2
1k
Ω
OPA735
C
2
100nF
C
3
1
µ
F
−
5V
R
9
10k
Ω
+5V
1/2
OPA2703
C
4
1
µ
F
−
5V
R
6
11k
Ω
+5V
1/2
OPA2703
−
5V
−
5V
REF1112
V
OUT
NOTE: The TPS434, by Perkin Elmer Optoelectronics, is a thermopile detector
with integrated thermistor for cold−junction reference.
Figure 5. Thermopile Non-Contact Surface Temperature Measurement
ADS8342
ADS8325
ADS1100
V
IN
V
REF
R
4
= 10k
Ω
R
3
10k
Ω
C
1
1nF
C
F
500pF
0.1V to 4.9V
R
F
300
Ω
R
2
R
1
C
2
= 1nF
Optional filter for use
with SAR−type
converters
operating at
sampling rates of
50kHz and below.
+5V
OPA735