AMSOP-77 데이터 시트보기 (PDF) - Advanced Monolithic Systems Inc
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AMSOP-77 Datasheet PDF : 7 Pages
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TYPICAL APPLICATIONS (Continued)
Positive Current Sink
V+
Precision Current Sinks
RL
IO
VIN
+
OP-77
200Ω
IRF520
IO = VIN
R1
VIN
-
VIN ≥ 0V
FULL SCALE OF 1V,
IO = 1A/V
R1
1Ω
AMSOP-77
Positive current Source
R1
+
OP-77
-
200Ω
IRF520
IO
IO = VIN
RL
R1
VIN ≤ 0V
V-
These simple high current sinks require that the load float between the power
supply and the sink. In these circuits, OP-77’s high gain, high CMRR, and
low TCVOS assure high accuracy.
Precision Absolute Value Amplifier
1kΩ
1kΩ
+15V
0.1µF
2-
7
6
OP-77E
3+
4 0.1µF
C1
30pF
D1
1N4148
D2
2N4393
R3
2kΩ
+15V
0.1µF
2-
7
6
OP-77E
3+
4 0.1µF
-15V
-15V
The high gain and low TCVOS assure accurate operation with inputs from
microvolts to volts. In this circuit, this signal always appears as a common-mode
signal to the op amps. The OP-77E CMRR of 1µV/V assures errors of less than
2ppm.
VOUT
0< VOUT<10V
Low Noise Precision Reference
+15V
+
10µF
2
REF-01 6
VO
4
2
REF-01 6
VO
4
2
REF-01 6
VO
4
100kΩ
100kΩ
100kΩ
-
OP-77
+
0.1µF
VOUT
This circuit relies upon OP-77’s low TCVOS and noise combined with very high CMRR,
to provide precision buffering of the averaged REF-01 voltage outputs.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
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