Texas Instruments TLV320ADC3120 768kHz Burr-Brown™ ADC
Texas Instruments TLV320ADC3120 768kHz Burr-Brown™ ADC is a high-performance, audio analog-to-digital converter (ADC) delivering simultaneous sampling of up to two analog channels or four digital channels for the pulse density modulation (PDM) microphone input. The TLV320ADC3120 is designed for line and microphone inputs, allowing for both single-ended and differential input configurations.
The TI TLV320ADC3120 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. Additionally, the device permits a sample rate from 8kHz to 768kHz. The device supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats and is controlled with an I2C interface. The integrated high-performance features, combined with the ability to be powered from a single supply of 3.3V or 1.8V, make the TLV320ADC3120 ideal for space-constrained audio systems in far-field microphone recording applications.
The TLV320ADC3120 is housed in a 20-pin WQFN package and has an operating temperature range of –40°C to +125°C.
Features
- Multichannel high-performance ADC:
- 2-channel analog microphones or line-in
- 4-channel digital PDM microphones
- Up to 2 analog and up to 2 digital microphone channels
- ADC line and microphone differential input performance:
- 106dB Dynamic range (DR)
- –95dB THD+N
- 109dB, 2-channel ADC channel summing mode, DR performance
- 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 is 9.5mW/channel at a 48kHz sample rate
Applications
- Smart speakers
- IP network cameras
- Professional microphones and wireless systems
- Video conference systems
Associated Products
Texas Instruments ADC3120EVM-PDK Audio ADC Evaluation Module
Tests the capabilities of the TLV320ADC3120, a two-channel, high-performance, audio ADC.
Simplified Block Diagram
