Advanced Monolithic Systems, Inc.

www.advanced-monolithic.com

Phone (925) 443-0722

Fax (925) 443-0723

AMSOP-77

TYPICAL APPLICATIONS (Continued)

Precision Current Sinks

Positive Current Sink

Positive current Source

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

Precision Absolute Value Amplifier

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 1

µV/V assures errors of less than

2ppm.

Low Noise Precision Reference

to provide precision buffering of the averaged REF-01 voltage outputs.

OP-77

+

-

R

L

200

Ω

IRF520

R1

1

Ω

V+

V

IN

I

O

R1

V

I

IN

O

=

0V

≥

FULL SCALE OF 1V,

I

OP-77

+

-

R1

200

Ω

IRF520

R

L

V

IN

I

O

V-

R1

V

I

IN

O

=

0V

≤

OP-77E

+

-

0.1

µF

-15V

+15V

R3

2k

Ω

4

6

7

2

3

0.1

µF

1k

Ω

OP-77E

+

-

0.1

µF

-15V

+15V

4

6

7

2

3

0.1

µF

1k

Ω

V

OUT

0< V

C1

30pF

D1

1N4148

2N4393

D2

2

6

4

V

O

REF-01

2

6

4

V

O

REF-01

2

6

4

V

O

REF-01

100k

Ω

100k

Ω

100k

Ω

OP-77

+

-

V

OUT

0.1

µF

+15V

10

µF

+