PCM1821-Q1中文资料德州仪器数据手册PDF规格书

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.