CS4461

更新时间： 2024-11-23 22:40:19

品牌	Logo	应用领域
凌云 - CIRRUS		/
页数	文件大小	规格书
11页	255K
描述
Multi-Bit A/D for Class-D Real-Time PSR Feedback

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CS4461 数据手册

CS4461

Multi-Bit A/D for Class-D Real-Time PSR Feedback

Features

General Description

z Advanced Multi-bit Delta-Sigma Architecture

The CS4461 is a complete analog-to-digital converter

for class-D real-time power supply rejection (PSR) feed-

back. It performs sampling and analog-to-digital

conversion, generating digital data for input to a

class-D modulator with real-time PSR feedback

capabilities.

z Real-time Feedback of Power Supply

Conditions (AC and DC)

z Filterless Digital Output Resulting in Very Low

Signal Delay

z 135 mW Power Consumption

The CS4461 uses a 5th-order, multi-bit delta-sigma

modulator followed by output data formatting. The ADC

uses a differential architecture which provides excellent

noise rejection.

z Supports Logic Levels Between 3.3 V and

5.0 V

z Differential Analog Architecture

z Modulator Overflow Detection

The CS4461 feeds back the AC and DC voltage compo-

nents and is ideal for class-D audio systems requiring

high power supply rejection.

z Interfaces Directly to the CS44800/CS44600

Class-D PWM Modulator

The CS4461 is available in a 24-pin TSSOP package in

both Commercial (-10° to +70° C) and Automotive

grade (-40° to +85° C). The CDB44800 Customer Dem-

onstration board is also available for device evaluation

and implementation suggestions. Please see “Ordering

Information” on page 11 for complete details.

z Multi-bit Conversion at up to 7.5 MHz

z Delivers Modulated Data Over 2-Wire Interface

REFGND

PSR_RESET PSR_EN

FILT+

Voltage Reference

OVERFLOW

PSR_MCLK

Output Data

AIN+

AIN-

LP Filter

DAC

PSR_SYNC

∆Σ

Formatting

PSR_DATA

S/H

GND

5.0 V

(VA)

3.3 V to 5.0 V

(VDP)

SEPTEMBER '05

DS650F1

http://www.cirrus.com

12 3 4 5 6 7...11

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