UTC571

www.DataSheet4U.com UTC571 COMPANDER DESCRIPTION LI NEAR I NTEGRATED CI RCUI T The UTC571 is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each channel has a fullwave rectifier to detect the average value of the signal, a linerarized temperature-compensated variable gain cell, and an operational amplifier. The UTC571 is well suited for use in cellular radio and radio communications systems, modems, telephone, and satellite broadcast/receive audio systems. FEATURES Complete compressor and expandor in one IChip Temperature compensated Greater than 110dB dynamic range Operates down to 6VDC System levels adjustable with external components Distortion may be trimmed out Voltage-controlled amplifier Dynamic noise reduction systems DIP-16 APPLICATIONS Cellular radio High level limiter Low level expandor—noise gate Dynamic filters CD Player www.DataSheet4U.com PIN CONFIGURATION RECT CAP 1 RECT IN 1 AG CELL IN 1 GND INV.IN 1 RES.R3 1 OUTPUT 1 THD TRIM 1 1 2 3 16 15 14 RECT CAP 2 RECT IN 2 AG CELL IN 2 VCC INV.IN 2 RES.R 3 2 OUTPUT 2 THD TRIM 2 4 5 6 7 8 UTC571 13 12 11 10 9 YOUW ANG ELECTRONI CS CO. LTD 1 DataSheet 4 U .com www.DataSheet4U www.DataSheet4U.com 4U.com www.DataSheet4U.com UTC571 BLOCK DIAGRAM THD TRIM LI NEAR I NTEGRATED CI RCUI T R3 INVERTER IN R3 20K G IN R2 20K VARIABLE GAIN R4 20K VREF 1.8V OUTPUT R1 10K RECT IN RECTIFIER RECT CAP A...