GENERAL DESCRIPTION

The AK7752 is a digital signal processor with an integrated stereo CODEC. The digital signal processor (DSP) can execute a high-quality hands-free algorithm, using only internal memory. Fine tuning is available for improving voice quality of the hands-free function in actual user environments. The AK7752 includes delay RAM, an integrated PLL, four digital audio input and eight digital audio output ports. The AK7752 can perform pre and post processing for speech recognition, volume control adjustment and parametric equalization, executed by programs downloaded via the microprocessor interface.

FEATURES

[ADC Block]

■ Sampling rate: 8kHz ~ 48kHz

■ 24-bit stereo

■ S/(N+D): 86dB

■ DR, S/N: 89dB (fs=8 kHz), 91dB (fs=48kHz)

■ Integrated DC offset canceling High Pass Filter

[DAC Block]

■ Sampling rate: 8kHz ~ 48kHz

■ 18-bit stereo

■ S/(N+D): 90dB (fs =8kHz), 88dB (fs=48kHz)

■ DR, S/N: 95dB (fs =8kHz), 95dB (fs=48kHz)

[Input/Output Digital Interface]

■ 4-channel Serial Data Input

■ 8-channel Serial Output

[General]

■ Integrated PLL

■ EEPROM (AK6514C) Interface

■ Microprocessor Interface: I²C BUS or AKM original mode

■ Power Supply: Single 3.3V ±0.3V

■ Operating Temperature Range: -40°C~85°C

■ 64pin LQFP