CS3318CQZ Cirrus Logic, Inc., CS3318CQZ Datasheet

CS3318CQZ

Manufacturer Part Number

CS3318CQZ

Description

QFP

Manufacturer

Cirrus Logic, Inc.

Datasheet

1.CS3318CQZ.pdf (44 pages)

Specifications of CS3318CQZ

Date_code

08+

Current page: 1 of 44
Download datasheet (643Kb)

Features

8-Channel

I²C/SPI

Control

Analog

Inputs

Serial

Complete Analog Volume Control

Wide Adjustable Volume Range

Low Distortion & Noise

Noise-Free Level Transitions

Low Channel-to-Channel Crosstalk

Comprehensive Serial Control Port

Flexible Power Supply Voltages

–

http://www.cirrus.com

8 Independently Controllable Channels

3 Configurable Master Volume and Muting

Controls

-96 dB to +22 dB in ¼ dB Steps

-112 dB THD+N

127 dB Dynamic Range

Zero-Crossing Detection with

Programmable Time-Out

120 dB Inter-Channel Isolation

Supports I²C

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

±8 V to ±9 V Analog Supply

+3.3 V Digital Supply

+3.3 V

±8 V to ±9 V

I²C / SPI

Control

and SPI

8-Channel Analog Volume Control

Port

Communication

Zero Crossing

Detector

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.

The I²C/SPI control interface provides for easy system

integration of up to 128 CS3318 devices over a single 2-

wire I²C or 3-wire SPI bus, allowing many channels of

volume control with minimal system controller I/O re-

quirements. Devices may be controlled on an individual

and grouped basis, simplifying simultaneous configura-

tion of a group of channels across multiple devices,

while allowing discrete control over all channels on an

individual basis.

The device operates from ±8 V to ±9 V analog supplies

and has an input/output voltage range of ±6.65 V to

±7.65 V. The digital control interface operates at +3.3 V.

The CS3318 is available in a 48-pin LQFP package in

Commercial grade (-10° to 70° C). The CS3318 Cus-

tomer Demonstration board is also available for device

evaluation. Refer to

for complete details.

“Ordering Information” on page 44

CS3318

DECEMBER '06

8-Channel

DS693F1

Outputs

Analog

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