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PCMD3140 Datasheet(PDF) 1 Page - Texas Instruments |
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PCMD3140 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 111 page  PCMD3140-Q1 Quad-Channel, PDM Input to TDM or I2S Output Converter 1 Features • 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 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, 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- 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 space- constrained 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. Device Information PART NUMBER(1) PACKAGE BODY SIZE (NOM) PCMD3140-Q1 WQFN (20) 3.00 mm × 3.00 mm with 0.5-mm pitch (1) For all available packages, see the package option addendum at the end of the data sheet. Audio Serial Interface (TDM, I 2S, LJ) PLL and Clock Generation I 2C Interface MICBIAS, Regulators and Voltage Reference Programmable Digital Filters, Biquads 4-Channel Digital PDM Microphones Simultaneous Conversion PDMDIN1_GPI1 PDMCLK_GPO1 PDMDIN2_GPI2 GPIO1 VREF FSYNC BCLK SDOUT SDA SCL AREG DREG AVSS Thermal Pad (VSS) AVDD IOVDD Simplified Block Diagram PCMD3140-Q1 SBASAH3A – APRIL 2022 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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