PCMD3180中文资料8 通道 PDM 输入至 TDM 或 I2S 输出转换器数据手册TI规格书

描述 Description

The PCMD3180 is a high-performance, pulse-density-modulation (PDM) input to time-division multiplexing (TDM) or I2S output converter that supports simultaneous sampling of up to eight 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 left-justified (LJ) audio formats, and can be controlled with either the I2C or SPI interface. Additionally, the PCMD3180 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 space-constrained audio systems in far-field microphone recording applications.

The PCMD3180 is specified from –40°C to +125°C, and is offered in a 24-pin WQFN package.

特性 Features

• 8-channel PDM microphones simultaneous conversion
• 127-dB dynamic range (DR) with high performance 5th order PDM input
• Channel summing mode, DR performance with high performance 4th order PDM input:
• 123-dB, 4-channel summing
• Programmable PDM clock output :
• Programmable output sample rate (fS) :
• Programmable channel settings:
• Gain calibration with 0.1-dB resolution
• Microphone bias or supply voltage generation
• Programmable HPF and biquad digital filters
• Integrated high-performance audio PLL
• Audio serial data interface:
• Word length: 16 bits, 20 bits, 24 bits, or 32 bits
• Single-supply operation: 3.3 V or 1.8 V
• Power consumption for 1.8-V supply:
• 2.5 mW/channel at 48-kHz sample rate