NCY9100 Compandor The NCY9100 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 temperaturecompensated variable gain cell, and an operational amplifier. NCY9100 THD TRIM INVERTER IN R 3 R 20k 3 DG IN R 20k 2 VARIABLE GAIN OUTPUT V REF + R 30k 4 1.8V RECT IN R 10k 1 RECTIFIER RECT CAP Figure 1. Block Diagram MAXIMUM RATINGS Rating Symbol Value Unit Maximum Operating Voltage V 18 VDC CC Operating Ambient Temperature Range T 40 to +85 C A Operating Junction Temperature T 150 C J Power Dissipation P 400 mW D Thermal Resistance, JunctiontoAmbient R 105 C/W JA Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.