CS3001
CS3002
DS490F9 13
3.4 Applications
The CS3001 and CS3002 amplifiers are optimum
for applications that require high gain and low drift.
Figure 19 illustrates a thermopile amplifier with a
gain of 650 V/V. The thermopile outputs only a few
millivolts when subjected to infrared radiation. The
amplifier is compensated and bandlimited by C1 in
combination with R2.
Figure 20, on page 13 illustrates a load cell bridge
amplifier with a gain of 768 V/V. The load cell is
excited with +5 V and has a 1 mV/V sensitivity. Its
full scale output signal is amplified to produce a
fully differential ± 3.8 V into the CS5510/12 A/D
converter. This circuit operates from +5 V.
CS3001
R1
100
R2
64.9k
C1
0.015μ F
Dexter Research
Thermopile 1M
Thermopile Amplifier with a Gain of 650 V/V
Figure 19. Thermopile Amplifier with a Gain of 650 V/V
VA
-
+
Ω
+
-
-
+
Ω
Ω
Ω
Ω
Ω
F
F
F
F
V-
V+
CS
+5 V +5 V
Counter/Timer
SC LK = 10 kHz to 100
(32.768
SCLK = 10 kHz to 100 kHz
(32.768 nom inal
)
Figure 20. Load Cell Bridge Amplifier and A/D Converter
