PCMD3140集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

PCMD3140属于集成电路（IC）的ADC/DAC-特殊用途。由德州仪器制造生产的PCMD3140ADC/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

• 4-channel PDM microphones simultaneous

conversion

• PDM input to TDM or I2S output converter

performance:

– 127-dB dynamic range (DR) with highperformance,

5th-order PDM input

– 117-dB dynamic range (DR) with highperformance,

4th-order PDM input

• Channel summing mode, DR performance with

high-performance, 4th-order PDM input:

– 120-dB, 2-channel summing

• Programmable PDM clock output:

– 768 kHz to 6.144 MHz

• Programmable output sample rate (fS):

– 8 kHz to 768 kHz

• Programmable channel settings:

– Digital volume control: –100 dB to 27 dB

– Gain calibration: 0.1-dB resolution

– Phase calibration: 163-ns resolution

• Microphone bias or supply voltage generation

• Voice activity detection (VAD)

• Low-latency signal processing filter selection

• Programmable HPF and biquad digital filters

• I2C control

• Integrated high-performance audio PLL

• Automatic clock divider setting configurations

• Audio serial data interface:

– Format: TDM, I2S, or left-justified (LJ)

– Word length: 16 bits, 20 bits, 24 bits, or 32 bits

– Master or slave interface

• Single-supply operation: 3.3 V or 1.8 V

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

• Power consumption for 1.8-V supply:

– 2.8mW/channel at 16-kHz sample rate

– 3.6 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 PCMD3140-Q1 is a high-performance, pulsedensity-

modulation (PDM) input to time-division

multiplexing (TDM) or I2S output converter that

supports simultaneous sampling of up to four

digital channels for the PDM microphone input.

The device integrates programable digital volume

control, a microphone bias voltage, a phase-locked

loop (PLL), a programmable high-pass filter (HPF),

biquad filters, low-latency filter modes, and allows

for output sample rates up to 768 kHz. The device

supports time-division multiplexing (TDM), I2S, or leftjustified

(LJ) audio formats, and can be controlled

with the I2C interface. Additionally, the PCMD3140-

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 or 1.8

V, make the device an excellent choice for spaceconstrained

audio systems in far-field microphone

recording applications.

The PCMD3140-Q1 is specified from –40°C to

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