AKM AK7756VF

Плавающая точкаI²C, SPI8 кГц36.5kB-40°C ~ 85°C

Overview

The AK7756 is a highly integrated digital signal processor, including a mono voice audio codec, a MIC pre-amplifier and digital audio I/F. The audio DSP has 9216step at fs = 8kHz parallel processing power. As the AK7756 is a RAM based DSP, it is programmable for user requirements such as hands free and acoustic effect. The AK7756EN is available in a space saving small 28pin QFN package and the AK7756VF is available in a 30pin VSOP package.

DSP   - Word length: 24bit (Data RAM 24bit floating point)   - Instruction cycle: 13.6 ns (9216 steps at fs=8 kHz)   - Multiplier 20 x 20 36bit (double precision available)   - Divider 20 / 20 20bit   - ALU: 36bit arithmetic operation (with overflow margin 4bit) 24bit floating point      arithmetic and logic operation   - Program RAM: 3072 x 36bit   - Coefficient RAM: 2048 x 20bit   - Data RAM: 1024 x 24-bit (24bit floating point)   - Delay RAM: 3072 x 20bit, 3072 x 20bit   - Master Clock: 4.6MHz ~ 73.7MHz   - JX pins (Interrupt) Audio Serial I/F   - Master / Slave operation   - Right / Left justified and I2S   - PCM (Short / Long Frame)   - 16bit linear, 8bit A-law, 8bit μ-law Mono CODEC   - Sampling Rate 8KHz, 16KHz   - DAC S/N: 91dB, S/(N+D): 83dB (fs:16kHz)   - ADC S/N: 86dB, S/(N+D): 77dB (fs:16kHz) Microphone interface   - Differential or single-ended input   - Programmable Gain (+33dB ~ +15dB and 0dB, 3dB step)   - Low Noise Microphone Bias Automatic Power Down (CODEC, DSP) μP I/F : SPI, I2C-slave I2C bootloader 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: -20℃ ~ 85℃ (AK7756EN), -40℃ ~ 85℃ (AK7756VF) Package:   28pin QFN (AK7756EN)   30pin VSOP (AK7756VF)

Features