LS505 DATA SHEET

FEATURES

• 72 dB typical gain

• 0.2 to 2.0 mA of transducer current adjustment

• 43 dB range of feedback volume control

• 1.0 to 1.6 V supply operating range

• Schottky diodes provide symmetrical peak clipping

• requires only 4 external parts for operation

STANDARD PACKAGING

• 8 pin MINIpac

• 8 pin MICROpac

• 8 pin PLID

®

• 8 pin SLT

• Chip (56 x 55 mils)

High Gain Class A Amplifier

with Peak Clipping

DESCRIPTION

The LS505 is a low voltage, monolithic integrated circuit

amplifier comprised of an operational amplifier driving a

single transistor Class A output stage with open collector.

Also included are a pair of complementary Schottky diodes

which provide the capability for symmetrical peak clipping in

a feedback configuration.

An internal negative feedback loop ensures a stable operating

point for the output stage over the designed operating voltage.

This also permits trimming of the output current with the use

of a single external resistor.

The input stage and microphone are biased by an internal

2.2 k

Ω decoupling resistor to increase battery line signal

rejection.

Revision Date: January 1996

100

-

+

7

4

33k

200

5

6

I/P

GND

8

1

2.2k

VB

MPO

3

O/P

2

BLOCK DIAGRAM

GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3

tel. (905) 632-2996 fax: (905) 632-5946

Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Suginami–ku Tokyo 168, Japan

tel. (03) 3334-7700

fax (03) 3247-8839

Document No. 500 - 20 - 11

All resistors in ohms, all capacitors in farads unless otherwise stated.