PCM1822集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

PCM1822属于集成电路（IC）的ADC/DAC-特殊用途。由德州仪器制造生产的PCM1822ADC/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。

1 Features

• Stereo high-performance ADC:

– 2-channel analog microphones or line-in

• ADC line and microphone differential and singleended

input performance:

– PCM1822-Q1 dynamic range:

• 117-dB, dynamic range enhancer enabled

• 111-dB, dynamic range enhancer disabled

– THD+N: –95 dB

• 1-VRMS full-scale input

• ADC sample rate (fS) = 8 kHz to 192 kHz

• Hardware pin control configurations

• Linear-phase or low-latency filter selection

• Flexible audio serial data interface:

– Master or slave interface selection

– 32-bits, 2-channel TDM

– 32-bits, 2-channel I2S

• Automatic power-down upon loss of audio clocks

• Integrated high-performance audio PLL

• Single-supply operation: 3.3 V

• I/O-supply operation: 3.3 V or 1.8 V

• Power consumption for 3.3-V AVDD supply:

– 19.6 mW/channel at 16-kHz sample rate

– 21.3 mW/channel at 48-kHz sample rate

2 Applications

• Automotive Active Noise Cancellation

• Automotive Head Unit

• Rear Seat Entertainment

• Digital Cockpit Processing Unit

• Telematics Control Unit

3 Description

The PCM1822-Q1 is a high-performance, Burr-

Brown™ audio analog-to-digital converter (ADC) that

supports simultaneous sampling of up to two analog

channels. The device supports single-ended and

differential line and microphone inputs with a 1-

VRMS full-scale signal. The device integrates a

phase-locked loop (PLL), a DC removal high-pass

filter (HPF), and supports sample rates up to 192

kHz. The device supports time-division multiplexing

(TDM) or I2S audio formats, selectable with the

hardware pin level. Additionally, the PCM1822-Q1

supports master and slave mode selection for the

audio bus interface operation. These integrated highperformance

features, along with the ability to be

powered from a single supply of 3.3 V, make the

device an excellent choice for cost-sensitive, spaceconstrained

audio systems in far-field microphone

recording applications.

The PCM1822-Q1 is specified from –40°C to +125°C,

and is offered in a 20-pin WQFN package.