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音訊 ADC

PCMD3140

現行

四通道 PDM 輸入至 TDM 或 I²S 輸出轉換器

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產品規格表

PCMD3140

現行
產品規格表 立即訂購

產品詳細資料

Number of ADC channels 4 Analog inputs 0 Digital audio interface I2S, L, TDM Control interface I2C Sampling rate (max) (kHz) 768 ADC SNR (typ) (dB) 127 Rating Catalog Analog outputs 0 Operating temperature range (°C) -40 to 125
Number of ADC channels 4 Analog inputs 0 Digital audio interface I2S, L, TDM Control interface I2C Sampling rate (max) (kHz) 768 ADC SNR (typ) (dB) 127 Rating Catalog Analog outputs 0 Operating temperature range (°C) -40 to 125
WQFN (RTE) 20 9 mm² 3 x 3
  • 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
  • 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.

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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PCMD3180 現行 八通道脈衝密度調變輸入至 TDM 或 I²S 輸出轉換器 Identical performance; supports eight digital microphones, larger package

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* Data sheet PCMD3140 Quad-Channel, PDM Input to TDM or I2S Output Converter datasheet (Rev. A) PDF | HTML 2021年 6月 25日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
Application note Analog Microphone and ADC System in Far-field Application (Rev. B) PDF | HTML 2023年 12月 11日
Analog Design Journal Selecting capacitors to minimize distortion in audio applications (Rev. A) PDF | HTML 2023年 5月 2日

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開發板

PCMD3140EVM-PDK — 適用四通道 PDM 輸入到 TDM 或 I²S 輸出轉換器的 PCDM3140 評估模組

PCMD3140 評估模組 (EVM) 性能展示套件 (PDK) 可讓使用者測試 PCMD3140 的功能。PCMD3140 是高性能、脈衝密度調變 (PDM) 輸入至分時多工 (TDM) 或 IC 間音效 (I2S) 輸出轉換器，可針對 PDM 麥克風輸入支援同時採樣最多四個數位通道。

PCMD3140 EVM 與 AC-MB (隨附於套件內) 配對，此彈性音訊轉換器主機板可爲 EVM 提供電源、控制及數位音訊資料。

使用指南: PDF | HTML
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PCMD31XX-DRIVERS — PCMD31xx ADC 系列 Linux 驅動程式支援

These Linux drivers support our low-power audio analog-to-digital converters (ADCs) in the PCMD31xx device family, and include both .c and .h files. The "Go to third party" buttons below will allow you to downlod the appropriate drivers from git.kernal.org.

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SBAC292 — PCMD31x0 C Source Headers

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音訊 ADC
PCMD3140 — 四通道 PDM 輸入至 TDM 或 I²S 輸出轉換器 PCMD3180 — 八通道脈衝密度調變輸入至 TDM 或 I²S 輸出轉換器
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PCMD3140 IBIS Model

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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