TI TLV320AIC31IRHBR

The TLV320AIC31 is a low-power stereo audio codec with a stereo headphone amplifier, as well as multiple inputs and outputs, programmable in single-ended or fully-differential configurations. Extensive register-based power control is included, enabling stereo 48-kHz digital-to-analog converter (DAC) playback as low as 14 mW from a 3.3-V analog supply, making it ideal for portable, battery-powered audio and telephony applications. The record path of the TLV320AIC31 contains integrated microphone bias, a digitally-controlled stereo microphone pre-amp, and automatic gain control (AGC), with mix/mux capability among the multiple analog inputs. The playback path includes mix/mux capability from the stereo DAC and selected inputs, through programmable volume controls to the various outputs. The TLV320AIC31 contains four high-power output drivers as well as two fully differential output drivers. The high-power output drivers are capable of driving a variety of load configurations, including up to four channels of single-ended, 16-Ω headphones using ac-coupling capacitors, or stereo 16-Ω headphones in a capless output configuration. In addition, pairs of drivers can be used to drive 8-Ω speakers in a BTL configuration at 500 mW per channel. The stereo audio DAC supports sampling rates from 8 kHz to 96 kHz and includes programmable digital filtering in the DAC path for 3D, bass/treble/midrange effects, speaker equalization, and de-emphasis for 32-kHz, 44.1-kHz, and 48-kHz rates. The stereo-audio analog-to-digital converter (ADC) supports sampling rates from 8 kHz to 96 kHz and is preceded by programmable gain amplifiers providing up to +59.5 dB analog gain for low-level microphone inputs. The serial control bus supports the I²C protocol, while the serial-audio data bus is programmable for I²S, left-/right-justified, DSP, or TDM modes. A highly programmable PLL is included for flexible clock generation and support for all standard audio rates from a wide range of available MCLKs, varying from 512 kHz to 50 MHz, with special attention paid to the most popular cases of 12-MHz, 13-MHz, 16-MHz, 19.2-MHz, and 19.68-MHz system clocks. The TLV320AIC31 operates from an analog supply of 2.7 V to 3.6 V, a digital core supply of 1.65 V to 1.95 V and a digital I/O supply of 1.1 V to 3.6 V. The device is available in a 5×5 mm, 32-lead QFN package.

• Stereo Audio DAC:
  • 100-dB (A-Weighted) Signal-to-Noise Ratio
  • 16-/20-/24-/32-Bit Data
  • Supports Rates From 8 kHz to 96 kHz
  • 3D/Bass/Treble/EQ/De-Emphasis Effects
• Stereo Audio ADC:
  • 92-dB (A-Weighted) Signal-to-Noise Ratio
  • Supports Rates From 8 kHz to 96 kHz
• Six Audio Input Pins:
  • Two Stereo Differential/Single-Ended Inputs
• Six Audio Output Drivers:
  • Stereo 8-Ω, 500-mW/Channel Speaker Drive Capability
  • Stereo Fully-Differential or Single-Ended Headphone Drivers
  • Fully Differential Stereo Line Outputs
• Low Power: 14-mW Stereo, 48-kHz Playback With 3.3-V Analog Supply
• Programmable Input/Output Analog Gains
• Automatic Gain Control (AGC) for Recording
• Programmable Microphone Bias Level
• Programmable PLL for Flexible Clock Generation
• I²C Control Bus
• Audio Serial Data Bus Supports I²S, Left-/Right-Justified, DSP, and TDM Modes
• Extensive Modular Power Control
• Power Supplies:
  • Analog: 2.7 V to 3.6 V
  • Digital Core: 1.65 V to 1.95 V
  • Digital I/O: 1.1 V to 3.6 V
• Available Packages: 5-mm×5-mm, 32-Pin QFN