OP77_02 Datasheet, PDF (13/16 Pages) Analog Devices – Next Generation OP07 Ultralow Offset Voltage Operational Amplifier

OP77
15V
+
10␮F
2
2
2
REF-01
V_O ⁶
4
REF-01
V_O ⁶
4
REF-01
V_O ⁶
4
100⍀
100⍀
100⍀
OP77
0.1␮F
V_OUT
Figure 15. Low Noise Precision Reference
This circuit relies upon OP77’s low TCV_OS and noise combined
with very high CMRR to provide precision buffering of the
averaged REF01 voltage outputs.
C_H must be of polystyrene, Teflon*, or polyethylene to minimize
dielectric absorption and leakage. The droop rate is determined
by the size of C_H and the bias current of the AD820.
*Teflon is a registered trademark of the Dupont Company
1k⍀
15V
0.1␮F
2
7
V_IN
1k⍀
3 ^{OP77 6}
4
0.1␮F
1N4148
15V
0.1␮F
2N930
1k⍀
C_H
27
3 ^{AD820 6}
4 _0.1␮F
–15V
RESET
–15V
V_OUT
Figure 16. Precision Positive Peak Detector
REV. C
–13–