AK7735
AK7735 is Dual DSP manufactured by Asahi Kasei Microdevices.
[AK7735]
Dual DSP with 4ch ADC + 4ch DAC + 4ch SRC
1. General Description The AK7735 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, two 32-bit stereo DACs, 2 stereo sampling rate convertors supporting the sampling frequency up to 192k Hz and dual DSPs for Audio/HF process. Each DSP has 3072step/fs (when fs=48k Hz) parallel processing power. As the AK7735 is a RAM based DSP, it is freely programmable for user requirements, such as acoustic effects and proprietary high performance hands-free function. The AK7735 is available in a 48-pin LQFP package.
2. Features
- Dual DSP: (DSP1 and DSP2 have the same specification. Memory areas are shared by them)
- Word length:
28-bit (Simple floating point supported)
- Instruction cycle:
- Multiplier:
- Divider:
Max. 6.8ns (3072fs at fs=48k Hz) 24 x 24 → 48-bit (Double precision arithmetic available) 24 / 24 → 24-bit (Floating point normalization function)
- ALU:
52-bit Arithmetic Operation (with 4bits overflow margin)
- Program RAM:
4096-word x 36-bit
- Coefficient RAM:
6144-word x 24-bit
- Data RAM:
4096-word x 28-bit
- Delay RAM:
12288-word x 28-bit
- JX pins (Interrupt)
- Independent Power Management Function for DSP1, DSP2
- ADC1: 24-bit Stereo ADC with MIC Gain Amplifiers
- Sampling Frequency: fs = 8k Hz ~ 192k Hz
- Channel Independent Analog Gain Amplifiers (0~18d B(2d B Step), 18~36d B(3d B Step))
- Differential Input or Single-ended Input
- ADC Characteristics S/N: 106d B (fs=48k Hz, Differential Input, MIC Gain=0d B)
- Channel Independent Digital Volume Control (24d B～-103d B, 0.5d B Step, Mute)
- Digital HPF for DC Offset...
