AK7738VQ Datasheet, PDF (1/42 Pages) Asahi Kasei Microsystems – Multi DSP with 5ch ADC + 4ch DAC + 8ch SRC

[AK7738]
AK7738
Multi DSP with 5ch ADC + 4ch DAC + 8ch SRC
1. General Description
The AK7738 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. The AK7738 is capable of processing sound and voice such as for hands-free function simultaneously
because two DSPs are able to work on different but synchronized sampling frequencies. As the AK7738 is a
RAM based DSP, it is freely programmable for user requirements, such as acoustic effects and proprietary
high performance hands-free function. The AK7738 is available in a 64-pin LQFP package.
2. Features
□ DSP1/DSP2: (Memory areas are shared by DSP1 and DSP2)
- Word length:
28-bit (Simple floating point supported)
- Instruction cycle:
8.1ns (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:
8.1ns (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
- 4 types of Digital Filter for Sound Color Selection
015000122-E-00-PB
-1-
2015/01