Texas Instruments PCM3120-Q1 Software-Controlled Audio ADC
Texas Instruments PCM3120-Q1 Software-Controlled Audio ADC is a Burr-Brown™ high-performance, audio analog-to-digital converter (ADC) that supplies simultaneous sampling of up to two analog channels or four digital channels for the pulse density modulation (PDM) microphone input.
The TI PCM3120-Q1 Software-Controlled Audio ADC implements line and microphone inputs for single-ended and differential input configurations. The ADC 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 while permitting sample rates up to 768kHz.
The ADC supports 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 device an ideal choice for space-constrained audio systems in far-field microphone recording applications.
The PCM3120-Q1 is specified from -40°C to +125°C and is housed in a 20-pin WQFN package.
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:
- 106dB Dynamic range (DR)
- -95dB THD+N
- ADC channel summing mode, DR performance 109dB, 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:
- 0dB to 42dB, 0.5dB steps Channel gain
- –100dB to 27dB Digital volume control
- 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:
- TDM, I2S, or left-justified (LJ) format
- 16 bits, 20 bits, 24 bits, or 32 bits word length
- Master or slave interface
- 3.3V or 1.8V Single-supply operation
- 3.3V or 1.8V I/O-supply operation
- 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 Eval Modules
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
Related Products
Texas Instruments PCM3140-Q1 Audio ADCs
Automotive, quad-channel 768kHz Burr-Brown™ audio ADC with 106dB SNR.