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Texas Instruments PCM5120-Q1 2-Channel Burr-Brown™ Audio ADC

Texas Instruments PCM5120-Q1 2-Channel Burr-Brown™ Audio ADC supplies simultaneous sampling of up to two analog or four digital channels for the pulse density modulation (PDM) microphone input. The PCM5120-Q1 provides line and microphone inputs and permits single-ended and differential input configurations. The device integrates programmable channel gain, digital volume control, a programmable microphone bias voltage, a phase-locked loop (PLL), a programmable high-pass filter (HPF), biquad filters, and low-latency filter modes. It allows for sample rates up to 768kHz. The ACD furnishes time-division multiplexing (TDM), I²S, or left-justified (LJ) audio formats and can be controlled with the I²C interface.

These integrated high-performance features, combined with the ability to be powered from a single supply of 3.3V or 1.8V, make the TI PCM5120-Q1 ADC an ideal choice for space-constrained audio systems in far-field microphone recording applications.

The PCM5120-Q1 is housed in a 20-pin WQFN package and is specified from -40°C to +125°C.

Features

Multichannel high-performance ADC:
- 2-channel analog microphones or line-in
- 4-channel digital PDM microphones
- Up to 2x analog and up to 2x digital microphone channels
ADC line and microphone differential input performance:
- Dynamic range (DR):
  - 120dB, dynamic range enhancer (DRE) enabled
  - 108dB, DRE disabled
- –95dB THD+N
ADC channel summing mode, DR performance:
- 111dB, DRE disabled, 2-channel summing
ADC input voltage:
- Differential, 2V_RMS full-scale inputs
- Single-ended, 1V_RMS full-scale inputs
ADC sample rate (f_S) = 8kHz to 768kHz
Programmable channel settings:
- Channel gain of 0dB to 42dB, 0.5dB steps
- Digital volume control of -100dB to 27dB
- Gain calibration with 0.1dB resolution
- Phase calibration with 163ns resolution
Programmable microphone bias or supply voltage generation
Low-latency signal processing filter selection

Programmable HPF and biquad digital filters
Automatic gain controller (AGC)
Voice activity detection (VAD)
I²C control interface
Integrated high-performance audio PLL
Automatic clock divider setting configurations
Audio serial data interface:
- Format of TDM, I²S, or left-justified (LJ)
- Word length of 16 bits, 20 bits, 24 bits, or 32 bits
- Master or slave interface
Single-supply operation of 3.3V or 1.8V
I/O-supply operation of 3.3V or 1.8V
Power consumption for 1.8V AVDD supply of 9.5mW/channel at 48kHz sample rate

Applications

Automotive active noise cancellation
Automotive head unit
Rear seat entertainment

Digital cockpit processing unit
Telematics control unit

Texas Instruments PCM5120-Q1 2-Channel Burr-Brown™ Audio ADC

Features

Applications

Simplified Block Diagram

Functional Block Diagram

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