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( File format: PDF, 1189 KB )
Low Power Stereo Audio Codec for Portable Audio/Telephony (Rev. B)
Texas Instruments

Description
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- headphones using ac-coupling capacitors, or stereo 16- headphones in a capless output configuration. In addition, pairs of drivers can be used to drive 8- 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 1.525 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.
Features
Stereo Audio DAC:100-dB (A-Weighted) Signal-to-Noise Ratio16-/20-/24-/32-Bit DataSupports Rates From 8 kHz to 96 kHz3D/Bass/Treble/EQ/De-Emphasis EffectsStereo Audio ADC:92-dB (A-Weighted) Signal-to-Noise RatioSupports Rates From 8 kHz to 96 kHzSix Audio Input Pins:Two Stereo Differential/Single-Ended InputsSix Audio Output Drivers:Stereo 8-, 500-mW/Channel Speaker Drive CapabilityStereo Fully-Differential or Single-Ended Headphone DriversFully Differential Stereo Line OutputsLow Power: 14-mW Stereo, 48-kHz Playback With 3.3-V Analog SupplyProgrammable Input/Output Analog GainsAutomatic Gain Control (AGC) for RecordingProgrammable Microphone Bias LevelProgrammable PLL for Flexible Clock GenerationI2C? Control BusAudio Serial Data Bus Supports I2S?, Left-/Right-Justified, DSP, and TDM ModesExtensive Modular Power ControlPower Supplies:Analog: 2.7 V to 3.6 VDigital Core: 1.525 V to 1.95 VDigital I/O: 1.1 V to 3.6 VAvailable Packages: 5-mm 5-mm, 32-Pin QFN I2C, I2S are trademarks of NXP Semiconductors. All other trademarks are the property of their respective owners.

Related Datasheets
Part Number Description Category
? ?TLV320AIC23B Stereo Audio CODEC, 8-to 96-KHz, With Integrated Headphone Amplifier (Rev. H) Passives - Filters, Oscillators and Resonators
? ?TLV320AIC3104 Low Power Stereo Audio CODEC For Portable Audio/Telephony (Rev. A) Passives - Filters, Oscillators and Resonators
? ?TLV320AIC3106 Low Power Stereo Audio CODEC For Portable Audio/Telephony (Rev. D) Passives - Filters, Oscillators and Resonators
? ?TLV320AIC32 Low Power Stereo Audio Codec for Portable Audio/Telephony (Rev. B) Passives - Filters, Oscillators and Resonators
? ?TLV320AIC33 Low Power Stereo Audio Codec for Portable Audio/Telephony (Rev. A) Passives - Filters, Oscillators and Resonators
? ?TLV320AIC34 Four Channel Low Power Audio Codec (Rev. A) Passives - Filters, Oscillators and Resonators



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