AK7712A-VT - Asahi Kasei Microsystems

AK7712A-VT Built-in 20-bit ADC/DAC Sophisticated Audio DSP

The AK7712A is a DSP(Digital Signal Processor) with built-in high performance 20bit 2ch ADC and 4ch DAC, on purposeto control the sound field. It is possible to calculate 383 steps on 44.1kHz and 48kHz sampling respectively. In case of 32kHz sampling, it can caluculate up to 511 steps. With a combination of this LSI and external memory for delay data,it can .

Features

[ DSP unit ] † Word length: 24-bit (data RAM) † Instruction cycle time: 54ns(maximum speed) † Multiplier: 24 × 16 → 40-bit † Divider: 16 ÷ 16 → 16-bit † Program RAM: 384 × 32 bit † External memory: DRAM,Pseudo-SRAM and SRAM can be connected (only use for delay data). † Sampling frequency: 32kHz∼48kHz † Automatic clear function of external RAM: 47msec after bringing RST high at fs=48kHz (include internal data RAM) † Microcomputer interface: synchronized signal type 8-bit serial input 1 channel, synchronized signal type 24-bit serial output 1 channel † Master clock: 512(511)/384(383)/256(255)fs .