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OPA37CJ Datasheet, PDF (12/22 Pages) Texas Instruments – Ultra-Low Noise, Precision OPERATIONAL AMPLIFIERS | |||
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âIn
3
6
OPA37
Gain = 100
Bandwidth â 500kHz
For Gain = 1000, use INA106 differential amplifier.
2
INA105
Differential Amplifier
RF
5kâ¦
25kâ¦
25kâ¦
2
5
RG
101â¦
Input Stage Gain = 1 + 2RF /RG
RF
5kâ¦
2
6
OPA37
3
+In
3 25kâ¦
25kâ¦
1
6
Output
FIGURE 12. Low Noise Instrumentation Amplifier.
1kâ¦
200â¦
500pF
2
6
3 OPA37
1Mâ¦
0.1µF
Output
2kâ¦
EDO 6166
Transducer
Frequency Response
â 1kHz to 50kHz
FIGURE 13. Hydrophone Preamplifier.
0.1µF
100â¦
100kâ¦
2
6
OPA27
3
Output
Dexter 1M
Thermopile
Detector
NOTE: Use metal film resistors
and plastic film capacitor. Circuit
must be well shielded to achieve
low noise.
Responsivity â 2.5 x 104V/W
Output Noise â 30µVrms, 0.1Hz to 10Hz
FIGURE 14. Long-Wavelength Infrared Detector Amplifier.
20pF
TTL INPUT GAIN
â1â
+1
â0â
â1
9.76kâ¦
500â¦
Input
10kâ¦
2
D1
D2
6
4.99k⦠3 OPA27 8
S1
S2
1
TTL DG188
In
4.75kâ¦
1kâ¦
Offset
Trim +VCC
Balance
Trim
Output
4.75kâ¦
FIGURE 15. High Performance Synchronous Demodulator.
12
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OPA27, OPA37
SBOS135C
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