PRODUCT OVERVIEW

The AD1955 is a complete high performance single-chip stereo digital audio playback system. It is comprised of a multibit sigma-delta modulator, high performance digital interpolation filters, and continuoustime differential current output DAC section. Other features include an on-chip clickless stereo attenuator, mute capability, programmed through an SPI-compatible serial control port.

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:

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

Multibit Sigma Delta Modulator with “Perfect Differential

Linearity Restoration” for Reduced Idle Tones and Noise Floor

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 (A-Weighted Stereo)

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, I2S-Compatible and DSP Serial Port

28 Lead SSOP Plastic Package

APPLICATIONS

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

Audio Systems, Sampling Musical Keyboards, Digital Mixing

Consoles, Digital Audio Effects Processors

AD1955属于集成电路（IC） > ADC/DAC - 特殊用途。亚德诺半导体技术有限公司制造生产的AD1955ADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。