Features

All Time Constants Set Externally
VOGAD operating threshold: 100 µV
Compatible with SL610/611/612
Supply Voltage: 6V to 12V
Supply Current: 14mA
Operating Temperature: -55°C to +125°C

The SL622C is a silicon integrated circuit combining the functions of an audio amplifier with a voice-operated gain adjusting device (VOGAD).
It is designed to accept signals from a low sensitivity microphone and to provide a substantially constant output signal for a 60 dB range of input.
Additionally, a constant gain amplifier is incorporated, which provides an amplitude-limited output for sidetone in mobile transmitter/receiver applications.
The encapsulation is a 10 lead TO-5 package, and the device is designed to operate from a 6V to 12 volt supply, over a temperature range of -55°C to +125°C.
A voltage regulator produces an independent supply line at 4.7 Volts stabilised.