Datasheet

OPA27, OPA37
12
SBOS135C
www.ti.com
FIGURE 12. Low Noise Instrumentation Amplifier.
FIGURE 13. Hydrophone Preamplifier.
FIGURE 14. Long-Wavelength Infrared Detector Amplifier.
FIGURE 15. High Performance Synchronous Demodulator.
Output
OPA37
2
3
6
OPA37
3
2
6
6
1
5
3
2
INA105
Differential Amplifier
Input Stage Gain = 1 + 2R
F
/R
G
+In
–In
R
G
101Ω
R
F
5kΩ
R
F
5kΩ
Gain = 100
Bandwidth ≈ 500kHz
For Gain = 1000, use INA106 differential amplifier.
25kΩ
25kΩ
25kΩ 25kΩ
OPA37
Output
1kΩ
2kΩ
EDO 6166
Transducer
Frequency Response
≈ 1kHz to 50kHz
2
3
6
1MΩ
200Ω
500pF
0.1µF
Output
NOTE: Use metal film resistors
and plastic film capacitor. Circuit
must be well shielded to achieve
low noise.
Responsivity ≈ 2.5 x 10
4
V/W
Output Noise ≈ 30µVrms, 0.1Hz to 10Hz
Dexter 1M
Thermopile
Detector
100Ω 100kΩ
OPA27
2
3
6
0.1µF
Output
4.99kΩ
D2
D1
DG188
TTL
In
S1
S2
9.76kΩ
500Ω
Balance
Trim
OPA27
2
3
1
8
6
20pF
10kΩ
1kΩ
4.75kΩ
Offset
Trim
4.75kΩ
+V
CC
Input
TTL INPUT
“1”
“0”
GAIN
+1
–1