TI TLV320ADC3140IRTWT

The TLV320ADC3140 is a high-performance audio ADC supporting synchronous sampling of up to four analog channels or eight digital channels for PDM microphone inputs. The device supports line and microphone inputs and allows single-ended and differential input configurations. It integrates programmable channel gain, digital volume control, programmable microphone bias voltage, PLL, programmable HPF, biquad filters, low-latency filter mode, and achieves sampling rates up to 768kHz. The device supports TDM, I²S, or Left-Justified (LJ) audio formats and can be controlled via I²C or SPI interfaces. These integrated high-performance features, combined with the ability to operate from a single 3.3V or 1.8V supply, make this device an excellent choice for space-constrained audio systems in far-field microphone recording applications.

• Multi-channel high-performance ADC:
  • 4-channel analog microphone or line input
  • 8-channel digital PDM microphone, or analog and digital microphone combination
• ADC line and microphone differential input performance:
  • Dynamic Range (DR): 106dB
  • THD+N: –98dB
• ADC channel summing mode DR performance:
  • 109dB, 2-channel sum
  • 112dB, 4-channel sum
• ADC input voltage:
  • Differential 2VRMS full-scale input
  • Single-ended 1VRMS full-scale input
• ADC sample rate (fS) = 8kHz to 768kHz
• Programmable channel settings:
  • Channel gain: 0dB to 42dB, 1dB step size
• Digital volume control: –100dB to 27dB
  • Gain calibration resolution: 0.1dB
  • Phase calibration resolution: 163ns
• Programmable microphone bias or supply voltage generation
• Low-latency signal processing filter selection
• Programmable HPF and biquad digital filters
• Automatic Gain Controller (AGC)
• I2C or SPI control
• Integrated high-performance audio PLL
• Automatic clock divider settings
• Configurable audio serial data interface:
  • Format: TDM, I²S, or Left-Justified (LJ)
  • Word length: 16-bit, 20-bit, 24-bit, or 32-bit
  • Master/slave interface
• Single-supply operation: 3.3V or 1.8V
• I/O supply operation: 3.3V or 1.8V
• Power consumption at 1.8V AVDD supply voltage:
  • 8.5mW/channel (16kHz sample rate)
  • 9.2mW/channel (48kHz sample rate)

• Microphone array systems
• Voice-activated digital assistants
• Teleconferencing systems
• Security and surveillance systems