TECHNICAL DATA

1

Low Power Audio Amplifier

The IL34119 is a low power audio amplifier integrated circuit

intended

(primarily)

for

telephone

applications,

such

as

in

speakerphones. It provides differential speaker outputs to maximize

output swing at low supply voltages (2.0 volts minimum). Coupling

capacitors to the speaker are not required. Open loop gain is 80 dB,

and the closed loop gain is set with two external resistors. A Chip

Disable pin permits powering down and/or muting the input signal.

The IL34119 is available in a standard 8 pin DIP or a surface mount

package.

• Wide Operating Supply Voltage Range (2-16 Volts) - Allows

Telephone Line Powered Applications

• Low Quiescent Supply Current for Battery Powered Applications

• Chip Disable Input to Power Down the IC

• Low Power Down Quiescent Current

• Drives a Wide Range of Speaker Loads (8-100Ω)

• Output Power Exceeds 250 mW with 32Ω Speaker

• Low Total Harmonic Distortion

• Gain Adjustable from <0 dB to >46 dB for Voice Band

• Requires Few External Components

IL34119

ORDERING INFORMATION

IL34119N Plastic

IL34119D SOIC

all packages

PIN ASSIGNMENT

SIMPLIFIED BLOCK DIAGRAM

* = Optional

Differential Gain = 2 x