AK7735EQ Datasheet, PDF (1/142 Pages) Asahi Kasei Microsystems – Dual DSP with 4chADC + 4chDAC + 4chSRC

[AK7735]
AK7735
Dual DSP with 4chADC + 4chDAC + 4chSRC
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 192kHz and dual DSPs for Audio/HF process. Each
DSP has 3072step/fs (when fs=48kHz) 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:
Max. 6.8ns (3072fs 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:
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 = 8kHz ~ 192kHz
- Channel Independent Analog Gain Amplifiers (0~18dB(2dB Step), 18~36dB(3dB Step))
- Differential Input or Single-ended Input
- ADC Characteristics S/N: 106dB (fs=48kHz, Differential Input, MIC Gain=0dB)
- Channel Independent Digital Volume Control (24dB～-103dB, 0.5dB Step, Mute)
- Digital HPF for DC Offset Cancelling
- Low Noise MIC Power Output: 1ch
- 4 types of Digital Filter for Sound Color Selection
□ ADC2: 24-bit Stereo ADC with Input Selector
- Sampling Frequency: fs = 8kHz ~ 192kHz
- Analog Input Selector: Differential Input x1 or Single-ended Input x2,
- ADC Characteristics S/N: 106dB (fs=48kHz, Differential Input)
- Channel Independent Digital Volume (24dB ~ -103dB, 0.5dB Step, Mute)
- Digital HPF for DC Offset Cancelling
- 4 types of Digital Filter for Sound Color Selection
016014707-E-00
-1-
2016/12