PCM1821集成電路（IC）的ADC/DAC-特殊用途規(guī)格書PDF中文資料

1 Features

? Stereo high-performance ADC:

– 2-channel analog microphones or line-in

? ADC line and microphone differential and singleended

input performance:

– PCM1822 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

? Smart Speakers

? DVD recorders and players

? AV receivers

? Video conference systems

? IP network cameras

3 Description

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

is offered in a 20-pin WQFN package.