AD1955 Analog Devices, AD1955 Datasheet

AD1955

Manufacturer Part Number

AD1955

Description

High Performance, Multibit Sigma-delta DAC With Sacd Playback

Manufacturer

Analog Devices

Datasheet

1.AD1955.pdf (10 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AD1955ARSZ

Manufacturer:

ADI/亚德诺

Quantity:

20 000

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FEATURES

5V Power Supply Stereo Audio DAC System.

Accepts 16/18/20/24-Bit Data

Supports 24-Bits, 192kHz Sample Rate PCM Audio Data

Supports SACD bit-stream and External Digital Filter Interface

Accepts a Wide Range of PCM Sample Rates Including:

Multibit Sigma Delta Modulator with “Perfect Differential

Data Directed Scrambling DAC - Least Sensitive to Jitter

Supports SACD playback with “Bit Expansion” filter

Differential Current Output for Optimum Performance

8.64 mA p-p Output Current with +3dB headroom in SACD mode

120 dB SNR/DNR (not muted) at 48KHz Sample Rate

123 dB SNR/DNR (Mono)

-110 dB THD+N

110 dB Stopband Attenuation with +/-0.0002dB Passband Ripple

8 Times Oversampling Digital Filter

On-chip Clickless Volume Control

Supports SACD-Mute pattern detection

Supports 64fs/128fs DSD SACD with phase modulation

Internal Digital Filter pass-through for External Filter

Master clock: 256fs,384fs,512fs,768fs

Hardware and Software Controllable Clickless Mute

Serial (SPI) Control for: Serial Mode, Number of Bits,

Sample Rate, Volume, Mute, De-emphasis, Mono Mode

Digital De-emphasis for 32, 44.1, 48 KHz Sample Rates

Flexible Serial Data Port with Right-Justified, Left-Justified,

28 Lead SSOP Plastic Package

FUNCTIONAL BLOCK DIAGRAM

Rev. PrF 3/18/2002

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 which may

result from its use. No license is granted by implication or otherwise under

any patent or patent rights of Analog Devices.

External Digital

32kHz, 44.1kHz. 48kHz, 88.2kHz, 96kHz, and 192kHz

Linearity Restoration” for Reduced Idle Tones and Noise Floor

(A-Weighted Stereo)

Audio Data /

Preliminary Technical Data

16/20/24Bit

Filter Input

Bitstream

S-Compatible and DSP Serial Port

Input

DSD

3 / 4

Master Clock

Auto-Clock

Divider

Input

Serial Data

Interface

Filter I/F

External

Filter

DSD

Control Data

Control

SPI

Input

Digital

Engine

Filter

RESET

High Performance Multibit Σ∆

S/H

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

Tel: 781/329-4700

Fax: 781/326-8703

APPLICATIONS

High-End DVD-Audio, SACD, CD, Home Theatre Systems, Automotive

Audio Systems, Sampling Musical Keyboards, Digital Mixing

Consoles, Digital Audio Effects Processors

PRODUCT OVERVIEW

audio playback system. It is comprised of a multibit sigma-delta

modulator, high performance digital interpolation filters, and continuous-

time differential current output DAC section. Other features include an

on-chip clickless stereo attenuator, mute capability, programmed through

an SPI-compatible serial control port. The AD1955 is fully compatible

with all known DVD audio formats including 192kHz as well as 96kHz

sample frequencies and 24-bits. It also is backwards compatible by

supporting 50/15µs digital de-emphasis intended for “redbook” Compact

Discs, as well as de-emphasis at 32kHz and 48kHz sample rate.

glueless interconnection to a variety of ADCs, DSPs, SACD decoder,

external digital filter, AES/EBU receivers and sample rate converters.

The AD1955 can be configured in Left-justified, I

DSP serial port compatible modes. It can support MSB first, twos-

compliment format, 16, 18, 20 and 24 bits in all standard PCM modes.

Also the AD1955 has an interface for SACD playback and an external

digital filter interface for use with an external digital interpolation filter

or HDCD decoder. The AD1955 uses a +5 V power supply. It is

fabricated on a single monolithic integrated circuit and is housed in a 28-

pin SSOP package for operation over the temperature range -40

+105

The AD1955 is a complete high performance single-chip stereo digital

The AD1955 has a very flexible serial data input port that allows for

Sigma-Delta

Modulator

Multibit

MUTE

Digital

Supply

Scrambling

with SACD Playback

Shaped

Noise-

Analog

Supply

ZERO Flags

Reference

I-DAC

Voltage

I-DAC

www.analog.com

AD1955

S, Right-Justified, or

Σ∆

Σ∆ DAC

L-ch

R-ch

Differential

Current Output

C to

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