PCM1841-Q1中文资料汽车级、四通道、32 位、192kHz 音频模数转换器 (ADC)数据手册TI规格书

描述 Description

The PCM1841-Q1 is a high-performance, Burr-Brown™ audio analog-to-digital converter (ADC) that supports simultaneous sampling of up to four analog channels. The device supports differential line and microphone inputs with a 2VRMS full-scale signal. The device integrates microphone bias voltage, a phase-locked loop (PLL), a DC removal high-pass filter (HPF), and supports sample rates up to 192kHz. The device supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats, selectable with the hardware pin level. Additionally, the PCM1841-Q1 supports controller and target 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 3.3V, make the device an excellent choice for cost-sensitive, space-constrained audio systems in far-field microphone recording applications.

The PCM1841-Q1 is specified from –40°C to +125°C and is offered in a 24-pin VQFN package.

特性 Features

Multichannel high-performance ADC:

4-channel analog microphones or line-in



ADC line and microphone differential input performance:

Dynamic range:

123dB, dynamic range enhancer enabled

113dB, dynamic range enhancer disabled



THD+N: –98dB



ADC differential 2VRMS full-scale input

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

Hardware pin control configurations

Linear-phase or low-latency filter selection

Flexible audio serial data interface:

Controller or target interface selection

32-bits, 4-channel TDM

32-bits, 2-channel TDM

32-bits, 2-channel I2S

32-bits, 2-channel left-justified (LJ)



Automatic power-down upon loss of audio clocks

Integrated high-performance audio PLL

Low-noise MICBIAS 2.75V output

Single-supply operation: 3.3V

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

Power consumption for 3.3V AVDD supply:

17.0 mW/channel at 16kHz sample rate

18.4 mW/channel at 48kHz sample rate