AK7738A
Description
The AK7738A is a highly integrated digital signal processor, including a 24-bit stereo ADC with MIC gain amplifiers, a 24-bit stereo ADC with input selector, a monaural ADC, two 32-bit stereo DACs, 4 stereo sampling rate convertors supporting the sampling frequency up to 192kHz, two DSPs and a Sub DSP for Audio/HF process. Each two DSPs and a Sub DSP has 2560step/fs (when fs=48kHz) parallel processing power.
Key Features
- 1ns (2560fs at fs=48kHz) - Multiplier: 24 x 24 → 48-bit (Double precision arithmetic available) - Divider: 24 / 24 → 24-bit (Floating point normalization function) - ALU: 52-bit arithmetic operation (with 4bits overflow margin) - Program RAM: 8192 word x 36-bit - Coefficient RAM: 6144 word x 24-bit - Data RAM: 6144 word x 28-bit - Delay RAM: 20480 word x 28-bit - JX pins (Interrupt) - Clock Mode Selector for DSP1, DSP2 - Independent Power Management Function for DSP1, DSP2 □ Sub DSP - Word length: 28-bit (Simple floating point supported) - Instruction cycle:
- 1ns (2560fs at fs=48kHz) - Multiplier: 24 x 24 → 48-bit (Double precision arithmetic available) - Divider: 24 / 24 → 24-bit (Floating point normalization function) - ALU: 52-bit arithmetic operation (with 4bits overflow margin) - Program RAM: 1024 word x 36-bit - Coefficient RAM: 2048 word x 24-bit - Data RAM: 4096 word x 28-bit □ ADC1: 24-bit Stereo ADC with MIC Gain Amplifiers - Sampling Frequency: fs=8kHz to 192kHz - Channel Independent Analog Gain Amplifiers (0 to 18dB(2dB Step), 18 to 36dB(3dB step)) - Differential Input or Single-ended Input - ADC Characteristics S/N: 102dB (fs=48kHz, Differential Input, MIC Gain=0dB,) - Channel Independent Digital Volume Control (+24 to -103dB, 0.5dB Step, Mute) - Analog DRC (Dynamic Range Control) - Digital HPF for DC Offset Cancelling - Low Noise MIC Power Output: 2ch - 5 types of Digital Filter for Sound Color Selection
