[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 (+33dB ~ +15dB and 0dB , 3dB 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://www. Datasheet4U. com
[AK7757]
■ Block Diagram
AVDD 2 PMMB MICBIAS
MIC Power Supply
MPRF
VCOM
DVDD 2
DVDD18 AVSS 2
DVSS 2
AINTP AINTN...
AK7757 PDF File
