Description

The AK7722VQ is a digital signal processor with an integrated 4ch 24bit DAC, a stereo ADC with input selector and a 2ch input ADC. It features high performance achieving 108dB, 96dB, and 95dB for the DAC and ADCs respectively. The integrated SRC allows the DSP to operate in master mode with digital inputs. With a 1536step/fs parallel arithmetic operation performance and a 5k-word delay RAM, the AK7722VQ supports surround processing and time alignment adjusting. It is programmable to meet various user requirements and is housed in an 80pin LQFP package.

Specifications and features

DSP Block: - Word length: 24bit (Coefficient RAM & Data RAM: F24 floating point) - Processing Speed: 13.6 ns (1536step/fs; fs = 48kHz) - Multiplication: 20 x 24 →44-bit Double precision arithmetic available - Divider 20 / 20 →20bit - ALU: 48bit arithmetic operation (overflow margin 4bit) 20bit floating point arithmetic and logic operation - Program RAM: 3072 x 36bit - Coefficient RAM: 2048 x 24bit (F24 floating point) - Data RAM: 2048 x 24-bit (F24 floating point) - Offset Register: 64 x 13bit - Delay RAM1: 3072 x 24-bit - Delay RAM2: 2048 x 24-bit - Sampling rate: fs= 7.35k ~ 48kHz - Master Clock: 1536fs (generated from 32fs, 48fs, 64fs, 128fs, 256fs, 384fs by internal PLL) - Master/Slave Operation ADC1 Block: - Stereo with 6 Inputs Selector - DR, S/N: 96dB (fs = 48kHz, when differential input) - S/(N+D): 90dB (fs = 48kHz) - Differential & Single-ended Inputs - Digital HPF (fc=1Hz) - 6 Analog Inputs Selector (2 differential, 4 single-ended) - Digital Volume Control (24dB ~ -103dB, 0.5dB Step, Mute) ADC2 Block: - DR, S/N: 95dB (fs = 48kHz) - Single-ended Inputs - Digital Volume Control (24dB ~ -103dB, 0.5dB Step, Mute) SRC Block: - 3 Pair of Stereo →1 Stereo Pair Selector - 2ch x 1 system - Supporting frequency: Fin = 7.35kHz ~ 96kHz →Fout = 7.35kHz ~ 48kHz (FSO/FSI = 0.167~ 6.0) Guidance SRC Block (GSRC): - 1 Channel (24bit) Up-converter for Voice Guidance - Supporting frequency: Fin = 7.35kHz ~ 12kHz →Fout = 44.1kHz or 48kHz DAC Block: - 4ch (2 Stereos) - 24bit 128 x Over-sampling advanced multi-bit (fs=8kHz~48kHz) - DR, S/N: 108dB (Differential Output) - S/(N+D): 90dB - Digital Volume Control (12dB ~ -115dB, 0.5dB Step, Mute) Digital Interface Input/Output: - Digital Signal Input Port (4ch): 24bit MSB justified, 24/20/16bit LSB justified and I2S Format - Digital Signal Output Port (6ch): 24bit MSB justified, 24/16bit LSB justified and I2S Format Micro Computer Interface: - I2C or 4-wired Interface General: - Integrated PLL - Integrated Regulator 3.3V →1.8V - Power Supply: 3.3V ± 0.3V - Operating Temperature Range: -40˚C ~ 85˚C - 80pin LQFP

Application Scenarios

The AK7722VQ is suitable for various applications in the field of audio signal processing. It can be used in audio equipment, sound systems, amplifiers, and more. Its high performance and flexibility make it an ideal choice for professional audio applications.

Comparison

- High performance DAC and ADCs with excellent signal-to-noise ratio - Programmable DSP for customizable audio processing - Integrated SRC for easy interfacing with digital inputs - Support for multiple input/output formats and configurations - Wide operating temperature range

- Limited availability of 80pin LQFP package