DESCRIPTION

The LP502 is a compression (AGC) preamplifier that consists of a single-ended input inverting amplifier, with an internal current controlled resistance connected between input and output.

By using RGT (see test circuit) to vary the value of this current controlled resistance, the amplifier gain and compression threshold can be controlled over a range of 60 dB.

FEATURES

• adjustable gain from 0 to 60 dB

• 0.94 V DC voltage regulator on-chip

• attack time fixed at less than 1 ms

• release time adjustable from 40 to 500 ms

• low input referred noise 1.2 µV

• <1 distortion at 10 mVRMS output

• operates from 1.05 to 3 VDC