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TLV320AIC31

更新时间： 2024-11-27 05:29:11
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LOW POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY

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TLV320AIC31  
SLAS497A–AUGUST 2006–REVISED SEPTERMBER 2006  
LOW POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY  
FEATURES  
DESCRIPTION  
•
Stereo Audio DAC  
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 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.  
– 100 dB A 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 Signal-to-Noise Ratio  
– Supports Rates From 8 kHz to 96 kHz  
Six Audio Input Pins  
The record path of the TLV320AIC31 contains  
integrated microphone bias, 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.  
•
•
– 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  
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 cap-less output configuration. In addition, pairs  
of drivers can be used to drive 8-Ω speakers in a  
BTL configuration at 500 mW per channel.  
– 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 Record  
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  
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 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.  
•
•
•
•
Extensive Modular Power Control  
Power Supplies:  
– Analog: 2.7 V – 3.6 V  
– Digital Core: 1.525 V – 1.95 V  
– Digital I/O: 1.1 V – 3.6 V  
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.  
•
Available Packages: 5 × 5 mm, 32-Pin QFN  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2006, Texas Instruments Incorporated  
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