PCMD3140 Series

Four-channel PDM-input to TDM- or I²S-output converter

Catalog

Four-channel PDM-input to TDM- or I²S-output converter

Part	Sampling Rate (Per Second) [Max]	Sampling Rate (Per Second) [Min]	Type	Supplier Device Package	Resolution (Bits)	Mounting Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Number of Channels	Voltage Supply Source	Data Interface	Operating Temperature [Min]	Operating Temperature [Max]
Texas Instruments PCMD3140IRTER	768 k	7.35 k	Audio	20-WQFN (3x3)	16 b 20 b 24 b 32 b	Surface Mount	1.9 V 3.6 V	1.7 V 3 V	20-WFQFN Exposed Pad	4	Dual Supply	I2C I2S TDM	-40 °C	125 °C

Catalog

Four-channel PDM-input to TDM- or I²S-output converter

Key Features

• 4-channel PDM microphones simultaneous conversionPDM input to TDM or I2S output converter performance:127-dB dynamic range (DR) with high-performance, 5th-order PDM input117-dB dynamic range (DR) with high-performance, 4th-order PDM inputChannel summing mode, DR performance with high-performance, 4th-order PDM input:120-dB, 2-channel summingProgrammable PDM clock output:768 kHz to 6.144 MHzProgrammable output sample rate (fS):8 kHz to 768 kHzProgrammable channel settings:Digital volume control: –100 dB to 27 dBGain calibration: 0.1-dB resolutionPhase calibration: 163-ns resolutionMicrophone bias or supply voltage generationVoice activity detection (VAD)Low-latency signal processing filter selectionProgrammable HPF and biquad digital filtersI2C controlIntegrated high-performance audio PLLAutomatic clock divider setting configurationsAudio serial data interface:Format: TDM, I2S, or left-justified (LJ)Word length: 16 bits, 20 bits, 24 bits, or 32 bitsMaster or slave interfaceSingle-supply operation: 3.3 V or 1.8 VI/O-supply operation: 3.3 V or 1.8 VPower consumption for 1.8-V supply:2.8mW/channel at 16-kHz sample rate3.6 mW/channel at 48-kHz sample rate4-channel PDM microphones simultaneous conversionPDM input to TDM or I2S output converter performance:127-dB dynamic range (DR) with high-performance, 5th-order PDM input117-dB dynamic range (DR) with high-performance, 4th-order PDM inputChannel summing mode, DR performance with high-performance, 4th-order PDM input:120-dB, 2-channel summingProgrammable PDM clock output:768 kHz to 6.144 MHzProgrammable output sample rate (fS):8 kHz to 768 kHzProgrammable channel settings:Digital volume control: –100 dB to 27 dBGain calibration: 0.1-dB resolutionPhase calibration: 163-ns resolutionMicrophone bias or supply voltage generationVoice activity detection (VAD)Low-latency signal processing filter selectionProgrammable HPF and biquad digital filtersI2C controlIntegrated high-performance audio PLLAutomatic clock divider setting configurationsAudio serial data interface:Format: TDM, I2S, or left-justified (LJ)Word length: 16 bits, 20 bits, 24 bits, or 32 bitsMaster or slave interfaceSingle-supply operation: 3.3 V or 1.8 VI/O-supply operation: 3.3 V or 1.8 VPower consumption for 1.8-V supply:2.8mW/channel at 16-kHz sample rate3.6 mW/channel at 48-kHz sample rate

Description

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. 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.