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 compensated variable gain cell (△G) and a dynamic time constant buffer. The buffer permits independent control of dynamic attack and recovery time with minimum external components and improved low frequency gain control ripple distortion over previous compandors.
●The SA572 is intended for noise reduction in high-performance audio systems. It can also be used in a wide range of communication systems and video recording applications.
●Features
●• Independent Control of Attack and Recovery Time
●• Improved Low Frequency Gain Control Ripple
●• Complementary Gain Compression and Expansion with
●External Op Amp
●• Wide Dynamic Range − Greater than 110 dB
●• Temperature-Compensated Gain Control
●• Low Distortion Gain Cell
●• Low Noise − 6.0 μV Typical
●• Wide Supply Voltage Range − 6.0 V-22 V
●• System Level Adjustable with External Components
●• Pb−Free Packages are Available
●Applications
●• Dynamic Noise Reduction System
●• Voltage Control Amplifier
●• Stereo Expandor
●• Automatic Level Control
●• High-Level Limiter
●• Low-Level Noise Gate
●• State Variable Filter
