Cirrus Logic CS3308K-CQZR

The CS3308 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 CS3308 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 CS3308 implements configurable zero-crossing detection to provide glitch-free volume-level changes. The I²C/SPI control interface provides for easy system integration of up to 128 CS3308 devices over a single 2- wire I²C or 3-wire SPI bus, allowing many channels of volume control with minimal system controller I/O requirements. Devices may be controlled on an individual and grouped basis, simplifying simultaneous configuration of a group of channels across multiple devices, while allowing discrete control over all channels on an individual basis. The device operates from ±5 V analog supplies and has an input/output voltage range of ±3.65 V. The digital control interface operates at +3.3 V.

• 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 123 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 CS3308 Devices on the I²C or SPI Control Bus
• Standard Power Supply Voltages ±5 V Analog Supply +3.3 V Digital Supply