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 input

performance:

– PCM1820-Q1 dynamic range:

• 123-dB, dynamic range enhancer enabled

• 113-dB, dynamic range enhancer disabled

– PCM1821-Q1 dynamic range: 106 dB

– THD+N: –95 dB

• ADC differential 2-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 PCM182(0/1)-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 differential line and

microphone inputs with a 2-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 PCM182(0/1)-Q1 supports master and slave

mode selection for the audio bus interface operation.

These integrated high-performance features, along

with the ability to be powered from a single supply

of 3.3 V, make the device an excellent choice for costsensitive,

space-constrained audio systems in far-field

microphone recording applications.

The PCM182(0/1)-Q1 is specified from –40°C to

+125°C, and is offered in a 20-pin WQFN package.