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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- 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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Low Power Stereo Audio Codec for Portable Audio/Telephony datasheet (Rev. C) | 12 Nov 2008 | |
| Application note | Out-of-Band Noise Measurement Issues for Audio Devices (Rev. A) | 31 Dec 2019 | ||
| Application note | Audio Serial Interface Configurations for Audio Codecs (Rev. A) | 27 Jun 2019 | ||
| Application note | Audio Serial Interface Configurations for Audio Codecs | 22 Sep 2010 | ||
| Application note | Interfacing an I2S Device to an MSP430 Device (Rev. A) | 22 Mar 2010 | ||
| Application note | Configuring I2S to Generate BCLK from Codec Devices & WCLK from McBSP Port | 08 Jul 2009 | ||
| Application note | Using TLV320AIC3x Digital Audio Data Serial Interface w/TDM Support | 05 Jul 2006 | ||
| EVM User's guide | TLV320AIC31EVM - User Guide | 18 Nov 2005 | ||
| Application note | TLV320AIC3x WinCE 5.0 Drivers | 27 Sep 2005 |
For additional terms or required resources, click any title below to view the detail page where available.
Available in Linux main line: Yes
Available through git.ti.com: N/A
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COEFFICIENT-CALC (TIBQ) calculates the coefficients for the digital filter biquad transfer function implemented in TI audio codecs. The characteristics of the digital filter are adjusted by selecting a filter type and moving a control point within a window that shows the transfer function gain and (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
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