AK7757 Datasheet | Asahi Kasei Microdevices

[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 48k Hz 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 = 8k H 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 - Coefficient RAM: 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: 8k Hz~48k Hz - 3in / 1out Input Selector (Diffrentialx1single endx 1 single end with Mic Ampx1) - ADC S/N: 96d BA, S/ (N+D): 88d B † 1ch ADC2 - Sampling Frequenc y: 8k Hz~48k Hz - ADC S/N: 89d BA, S/(N+D): 82d B † 4ch DAC - Sampling Frequenc y: 8k Hz~48k Hz - DAC S/N: 107d BA, S/ (N +D): 92d B † Microphone Interface - Differentialor single-en d input - Programmable Gain (+33d B ~ +15d B and 0d B , 3d B step) - Low Noise Microp hone Bias † Automatic Power Down (CODEC, DSP) † μP I/F: SPI, I2C † Power supply Analog (AVDD): 3.0V ~ 3.6V (typ.3.3V) Digital1 (DVDD): 3. 0V ~ 3.6V (typ.3.3V) Digital2 (DVDD18): 1.7V ~ 1.9V (typ.1.8V) † Operating temperature range: -40 °C ~ 85°C † Package: 48pin LQFP MS1489-E-02-PB - 1 - 2013/07 http://.. [AK7757] - Block...