EVAL-AD1937EB【PDF 1/30 页】4 ADC/8 DAC with PLL, 192 kHz, 24 Bit CO

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4 ADC/8 DAC with PLL,

192 kHz, 24 Bit CODEC

AD1935/AD1936/AD1937/AD1938/AD1939

Preliminary Technical Data

Features

PLL generated (32-192kHz) or direct master clock

Low EMI design

109 dB DAC/ 107dB ADC Dynamic Range and SNR

-94dB THD+N

Single 3.3V Supply

Tolerance for 5V logic inputs

Supports 24-bits and 8 kHz - 192 kHz sample rates

Differential ADC input

Single-ended or Differential DAC output versions

Log volume control with "auto-ramp" function

Hardware and software controllable clickless mute

Software and hardware power-down

Right justified, left justified, I

S and TDM Modes

Master and slave modes up to 16 channel in/out

48-lead LQFP or 64-lead LQFP plastic package

Applications

Automotive audio systems

Home theater systems

Set-top boxes

Digital audio effects processors

GENERAL DESCRIPTION

The

AD193X family are

high performance, single-chip codecs that

provide 4 ADCs with differential input and 8 DACs with either

single-ended or differential output using ADI’s patented multibit

sigma-delta architecture. An SPI or I

C port is included, allowing

a microcontroller to adjust volume and many other parameters.

The

AD193X family

operates from 3.3V digital and analog supplies.

The

AD193X

is available in a 48-lead (SE output) or 64-lead

(differential output) LQFP package.

The AD193X is designed for low EMI. This consideration is

apparent in both the system and circuit design architectures. By

using the on-board PLL to derive master clock from L-R clock, the

AD193X eliminates the need for a separate high frequency master

clock. It can also be used with a suppressed bit clock. The D-A and

A-D converters are designed using the latest ADI continuous time

architectures to further minimize EMI. By using 3.3V supplies,

power consumption is minimized, further reducing emissions.

Functional Block Diagram

Serial Data Port

AD193X

DAC

ADC

DAC

ADC

Filter

SPI / I

Control

(Clock & PLL)

Reference

SDATAIN

SDATAOUT

CLOCKS

Inputs

Outputs

Input/Output

Digital

Control Port

Digital

Filter

Volume

Timing Management

Control

Precision

Voltage

Analog

Audio

Analog

Audio

Digital Audio

Control Data

Figure 1

Rev. Pr

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

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