OP77_15 Datasheet, PDF (13/16 Pages) Analog Devices – Next Generation OP07 Ultralow Offset Voltage Operational Amplifier

OP77
Figure 34 relies upon low TCVOS of the OP77 and noise
combined with very high CMRR to provide precision buffering
of the averaged REF-01 voltage outputs.
In Figure 35, CH must be of polystyrene, Teflon*, or
polyethylene to minimize dielectric absorption and leakage.
The droop rate is determined by the size of CH and the bias
current of the AD820.
*Teflon is a registered trademark of the Dupont Company
1kΩ
+15V
0.1µF
2
7
V_IN
1kΩ ₃ ^{OP77 6}
4
0.1µF
–15V
1N4148
+15V
0.1µF
RESET
2N930
C_H
2
7
6
1kΩ ₃ ^AD820
4
0.1µF
–15V
Figure 35. Precision Positive Peak Detector
V_OUT
Rev. E | Page 13 of 16