AK7757

[AK7757] AK7757 Audio DSP with 24bit 3ch ADC + 4ch DAC + MIC Amp GENERAL D ESCRIPTION The AK7757 is a d igital signal processor with an integrated 4ch DAC, a stereo AD C with input selector, a mono ADC and an integrated digital au dio interface. The audio D SP has 1536 step/fs (at 48kHz sampling) parallel arithmetic operation performance. As the AK7757 is a R AM based DSP, it is programmable for user requirements to realize the audio e ffects process or th e proprietary high-performance HF. It is housed in a 48pin LQFP which is a small package to save the PCB space. FEATURES † DSP - Word length: 24bits (Da ta RAM: F24floating point) - Processing Speed: 13.6 ns (9216step/fs; fs = 8kH z) - Multiplication: 20 x 20 → 36-bit Double precision arithmet ic available - Divider 20/ 20 → 20-bit - ALU: 40-bit arithmetic operation (ov erflow margin 4bits) 24-bit floatingpoint arith metic and logic operation - Program RAM: 4096 x 3 6bits - CoefficientRAM: 4096 x 20bits - Data RAM:2048 x 24bits (F24 floati ng point) - Delay RAM: 4096 x 20bits, 4096 x 20 bits - Master Clock: 73.7MHz - JX pins (interrupt) † 2ch ADC1 - Sampling Frequenc y: 8kHz~48kHz - 3in / 1outInput Selector (Diffrentialx1single endx 1 single end with MicAmpx1) - ADC S/N: 96dBA, S/ (N+D): 88dB † 1ch ADC2 - Sampling Frequenc y: 8kHz~48kHz - ADC S/N: 89dBA, S/(N+D): 82dB † 4ch DAC - Sampling Frequenc y: 8kHz~48kHz - DAC S/N: 107dBA, S/ (N +D): 92dB † Microphone Interface - Differentialor single-en d input - Programmable Gain ...