PCMD3180系列介绍资料

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PCMD3180

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八通道脉冲密度调制输入至 TDM 或 I²S 输出转换器

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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.

8-channel PDM microphones simultaneous conversion
PDM input to TDM or I²S output converter performance:
- 127-dB dynamic range (DR) with high performance 5^th order PDM input
- 117-dB dynamic range (DR) with high performance 4^th order PDM input
Channel summing mode, DR performance with high performance 4^th order PDM input:
- 120-dB, 2-channel summing
- 123-dB, 4-channel summing
Programmable PDM clock output :
- 768 kHz to 6.144 MHz
Programmable output sample rate (f_S) :
- 8 kHz to 768 kHz
Programmable channel settings:
- Digital volume control: –100 dB to 27 dB
- Gain calibration with 0.1-dB resolution
- Phase calibration with 163-ns resolution
Microphone bias or supply voltage generation
Low-latency signal processing filter selection
Programmable HPF and biquad digital filters
I²C or SPI controls
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:
- 2.9 mW/channel at 16-kHz sample rate
- 2.5 mW/channel at 48-kHz sample rate

Number of ADC channels	8
Analog inputs	0
Digital audio interface	I2S, L, TDM
Control interface	I2C, SPI
Sampling rate (max) (kHz)	768
ADC SNR (typ) (dB)	127
Rating	Catalog
Analog outputs	0
Operating temperature range (°C)	-40 to 125

WQFN (RTW)

16 mm² 4 x 4

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PCMD3180

八通道脉冲密度调制输入至 TDM 或 I²S 输出转换器

4000-306-326