Description

The CS3318 is an 8-channel digitally controlled analog volume control designed specifically for high-end audio systems. It features a comprehensive I²C/SPI serial control port for easy device and volume configuration.

The CS3318 includes arrays of well-matched resistors and complementary low-noise active output stages. A total adjustable range of 118 dB, in ¼ dB steps, is spread evenly over 96 dB of attenuation and 22 dB of gain.

The CS3318 implements configurable zero-crossing detection to provide glitch-free volume-level changes.

Features

♦ Complete Analog Volume Control

   – 8 Independently Controllable Channels

   – 3 Configurable Master Volume and Muting Controls

♦ Wide Adjustable Volume Range

   – -96 dB to +22 dB in ¼ dB Steps

♦ Low Distortion & Noise

   – -112 dB THD+N

   – 127 dB Dynamic Range

♦ Noise-Free Level Transitions

   – Zero-Crossing Detection with Programmable Time-Out

♦ Low Channel-to-Channel Crosstalk

   – 120 dB Inter-Channel Isolation

♦ Comprehensive Serial Control Port

   – Supports I²C® and SPITM Communication

   – Independent Control of up to 128 Devices on a Shared 2-Wire I²C or 3-Wire SPI Control Bus

   – Supports Individual and Grouped Control of all CS3318 Devices on the I²C or SPI Control Bus

♦ Flexible Power Supply Voltages

   – ±8 V to ±9 V Analog Supply

   – +3.3 V Digital Supply