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
- Dynamic range (DR):
- ADC channel summing mode, DR performance:
- 111dB, DRE disabled, 2-channel summing
- ADC input voltage:
- Differential, 2VRMS full-scale inputs
- Single-ended, 1VRMS full-scale inputs
- ADC sample rate (fS) = 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
Associated Products
Texas Instruments ADCx120Q1EVM-PDK & PCMD3140Q1EVM-PDK Eval Modules
EVMs are optimal to test the capabilities of the PCM3120-Q1 and PCMD3140-Q1 devices.
Simplified Block Diagram
Functional Block Diagram
Published: 2022-12-21
| Updated: 2025-03-05