Line Card

ADAU1701

 2007-10-15

【Basic Info】

【Product Feature】

Features : 28-/56-bit, 50 MIPS digital audio processor
: Two ADCs: SNR of 100 dB, THD + N of −83 dB
: Four DACs: SNR of 104 dB, THD + N of −90 dB
: Complete standalone operation
: Self-boot from serial EEPROM
: Auxiliary ADC with 4-input mux for analog control
: GPIOs for digital controls and outputs
: Fully programmable with SigmaStudio™ graphical tool
: 28-bit × 28-bit multiplier with 56-bit accumulator for full double-precision processing
: Clock oscillator for generating master clock from crystal
: PLL for generating master clock from 64 × fS, 256 × fS, 384 × fS, or 512 × fS clocks
: Flexible serial data input/output ports with I2S-compatible, left-justified, right-justified, and TDM modes
: Sampling rates up to 192 kHz supported
: On-chip voltage regulator for compatibility with 3.3 V systems
: 48-lead, plastic LQFP
Specification Instructions/Cycles : 1024
DAC DNR (dB) : 100dB
DAC THD+N @ 1 kHz (-3dB) : 90dB
Digital I/O Channels : 8/8
Analog I/O Channels : 2/4

【Application】

Applications : Multimedia speaker systems
: MP3 player speaker docks
: Automotive head units
: Minicomponent stereos
: Digital televisions
: Studio monitors
: Speaker crossovers
: Musical instrument effects processors
: In-seat sound systems (aircraft/motor coaches)

【Overview】

Product Brief The ADAU1701 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing includes equalization, cross-over, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening and can be used to compensate for real-world limitations of speakers, amplifiers, and listening environments, providing a dramatic improvements of perceived audio quality.
Its signal processing is comparable to that found in high end studio equipment. Most processing is done in full 56-bit, double-precision mode, resulting in very good low level signal performance. The ADAU1701 is a fully programmable DSP. The easy to use SigmaStudio software allows the user to graphically configure a custom signal processing flow using blocks such as biquad filters, dynamics processors, level controls, and GPIO interface controls.
ADAU1701 programs can be loaded on power-up either from a serial EEPROM through its own self-boot mechanism or from an external microcontroller. On power-down, the current state of the parameters can be written back to the EEPROM from the ADAU1701 to be recalled the next time the program is run.
Two Σ-Δ ADCs and four Σ-Δ DACs provide a 98.5 dB analog input to analog output dynamic. Each ADC has a THD + N of −83 dB, and each DAC has a THD + N of −90 dB. Digital input and output ports allow a glueless connection to additional ADCs and DACs. The ADAU1701 communicates through an I2C® bus or a 4-wire SPI® port.