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The TLV320AIC23B is a high performance stereo audio codec with highly integrated analog functions. The analog-to-digital converter (ADC) and digital-to-analog converter (DACS) in the TLV320AIC23B use multi-bit Sigma-Delta technology and an integrated oversampling digital interpolation filter. Data transfer word lengths of 16, 20, 24 and 32 bits are supported, and sampling rates from 8 kHz to 96 kHz are supported. The adcΣ modulator adopts a third-order multi-bit structure, with an audio sampling rate of up to 96 khz and a signal-to-noise ratio of up to 90 dba, enabling high-fidelity audio recording in a compact, energy-efficient design. DAC Sigma Delta

The modulator has a second-order multi-bit structure with a signal-to-noise ratio of up to 100 dBA, and audio sampling rates up to 96 kHz, enabling high-quality digital audio playback, while consuming less than 23 mW during playback alone. The TLV320AIC23B is an ideal analog input/output (I/O) choice for portable digital audio player and recorder applications such as MP3 digital audio players.

Integrated analog features include stereo line input with analog bypass, stereo headphone amplifier with analog volume control and mute, and a complete electret-mic-capsule biasing and buffering solution. The headphone amplifier is capable of delivering 30 megawatts per channel to 32. Analog bypass allows the use of stereo line inputs and headphone amps with analog volume controls, while bypassing the codec entirely, allowing for more flexibility in designs such as an integrated FM tuner. The microphone bias output provides a low noise current source for electret bias. The AIC23B has an integrated adjustable microphone amplifier (gain can be from 1 to 5) and programmable gain microphone amplifier (0 dB or 20 dB). If a side splitter is required, the microphone signal can be mixed with the output signal.

The TLV320AIC23B supports industry-standard oversampling rates of 256 fs and 384 fs, and offers unique oversampling rates of 250 fs and 272 fs, optimizing the use of TI C54x digital signal processors (DSPs) and Universal Serial Bus (USB) data Interface considerations in the design of the interface. A single 12 MHz crystal can clock the DSP, USB, and codec. The TLV320AIC23B has an internal oscillator, and when connected to a 12 MHz external crystal, it uses an internal clock buffer and selectable dividers to clock the DSP and other peripherals Provides the system clock. The audio sampling rate is 48 kHz and the compact disc (CD) standard 44.1 kHz directly supports oversampling rates of 250 fs and 272 fs from the 12 MHz master clock.

Low power consumption and flexible power management allow selective shutdown of codec functions, thereby extending battery life in portable applications. This design solution, coupled with the industry's smallest package, TI's proprietary Tiny Star Primary™ using only 25 mm2 of board area, enables robust portable stereo designs to be easily implemented in a cost-effective, space-saving total analog I/O solution: TLV320AIC23B.

High Performance Stereo Encoding 90 dB SNR Multi-Bit Sigma-Delta ADC (A-Weighted 48 kHz) 100-dB SNR Multi-Bit Sigma-Delta DAC (A-Weighted 48 kHz) 1.42 V-3.6 V Core Digital Power Supply: Compatible with TI C54x DSP Core Voltage 2.7 V-3.6 V Buffer and Analog Power Supply: Compatible with TI C54x DSP Buffer Voltage 8-kHz-96 kHz Sampling-Frequency Support Software Controlled via TI McBSP Compatible Multi-Protocol Serial Port 2-Wire Compatible and SPI Compatible Serial Protocol Stickless Interface to TI McBSP Audio-Data Input and Output Via TI McBSP Compatible Programmable Audio Interface I2S Compatible Interface McBSP for ADC and DAC Standard I2S, Data Transfer 16/20/24/32-bit Word Length Audio Master/Slave Timing function optimized for TI DSP (250/272 fs), USB mode

Industry-standard master/slave support is also available (256/384 fs), TI McBSP integrated full electret-microphone biasing and buffering scheme for normal mode glueless interface 3/4 AVDD low noise MICBIAS pins for biasing Built-in electret capsule Integrated buffer amplifier, additional control gain is 1~5 Optional buffer gain is 0 dB or 20 dB Stereo line input Integrated programmable gain amplifier Analog programmable gain amplifier input Stereo line input and microphone stereo line output DAC and Analog bypass mixer Input and output high efficiency linear headphone amplifier 30 MW to 32 MW, 3.3V analog supply voltage under full software control Flexible management 23 MW in playback mode 23 MW power consumption < 150 W standby power consumption <15W

Power consumption <15W Smallest package in industry: 32-Pin TI Proprietary Microstar? 25 mm2 total board area 28-pin TSSOP also available (62 mm2 total board area), ideal for portable solid state audio players and recorders