PCMD3140
- 4-channel PDM microphones simultaneous conversion
- PDM input to TDM or I2S output converter performance:
- 127-dB dynamic range (DR) with high-performance, 5th-order PDM input
- 117-dB dynamic range (DR) with high-performance, 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
The PCMD3140 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 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 left-justified (LJ) audio formats, and can be controlled with the I2C interface. Additionally, the PCMD3140 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 PCMD3140 is specified from –40°C to +125°C, and is offered in a 20-pin WQFN package.

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Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | PCMD3140 Quad-Channel, PDM Input to TDM or I2S Output Converter datasheet (Rev. A) | PDF | HTML | 25 Jun 2021 |
Analog Design Journal | Selecting capacitors to minimize distortion in audio applications (Rev. A) | PDF | HTML | 02 May 2023 | |
Application note | Analog Microphone and ADC System in Far-field Application (Rev. A) | PDF | HTML | 26 May 2022 |
Design & development
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PCMD3140EVM-PDK — PCDM3140 evaluation module for four-channel PDM-input to TDM- or I²S-output converter
The PCMD3140 evaluation module (EVM) performance demonstration kit (PDK) allows the user to test the capabilities of the PCMD3140. PCMD3140 is a high-performance, pulse-density modulation (PDM) input to time-division multiplexing (TDM) or inter-IC sound (I2S) output converter that supports (...)
PCMD31XX-DRIVERS — PCMD31xx ADC family Linux driver support
Linux main line status
Available in Linux (...)
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
Package | Pins | Download |
---|---|---|
WQFN (RTE) | 20 | View options |
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