V

BIAS1

V

BIAS2

V +

IN

V -

IN

ClassAB

Control

Circuitry

V

O

V-

(Ground)

V+

Reference

Current

5kW

OPAx340

10mAmax

V+

V

IN

V

OUT

I

OVERLOAD

RAIL-TO-RAIL OUTPUT

OPA340-EP

OPA2340-EP

OPA4340-EP

Figure 24. Simplified Schematic

Figure 25. Input Current Protection for Voltages Exceeding the Supply Voltage

moderate resistive loads (2 k

Ω to 50 kΩ), the output

can swing to within a few tens of millivolts from the

supply rails and maintain high open-loop gain. See

A class AB output stage

with

common-source

the typical characteristic curve Output Voltage Swing

transistors is used to achieve rail-to-rail output. For

vs Output Current.

light resistive loads (> 50 k

Ω), the output voltage is

typically a few millivolts from the supply rails. With

10

Submit Documentation Feedback

Copyright © 2008, Texas Instruments Incorporated

Product Folder Link(s): OPA340-EP OPA2340-EP OPA4340-EP