SA572 Programmable Analog Compandor The SA572 is a dual-channel, high-performance gain control circuit in which either channel may be used for dynamic range compression or expansion. Each channel has a full-wave rectifier to detect the average value of input signal, a linearized, temperature- SA572 R 1 (5,11) (7,9) 6.8k (6,10) G 500 GAIN CELL (1,15) (3,13) + + 10k BUFFER 270 10k RECTIFIER (16) P.S. (8) (4,12) (2,14) Figure 1. Block Diagram PIN FUNCTION DESCRIPTION Pin Symbol Description 1 TRACK TRIM A Tracking Trim A 2 RECOV. CAP A Recovery Capacitor A 3 RECT. IN A Rectifier A Input 4 ATTACK CAP A Attack Capacitor A 5 G OUT A Variable Gain Cell A Output 6 THD TRIM A Total Harmonic Distortion Trim A 7 G IN A Variable Gain Cell A Input 8 GND Ground 9 G IN B Variable Gain Cell B Input 10 THD TRIM B Total Harmonic Distortion Trim B 11 G OUT B Variable Gain Cell B Output 12 ATTACK CAP B Attack Capacitor B 13 RECT. IN B Rectifier B Input 14 RECOV. CAP B Recovery Capacitor B 15 TRACK TRIM B Tracking Trim B 16 V Positive Power Supply CC