| Audio
Processor |
| AK7770 |
| Floating Point Audio DSP with 24-Bit 4ch ADC/6ch DAC, SRC and Delay RAM |
| The AK7770 is a digital signal processor with an integrated 4-channel audio ADC and a 6-channel audio DAC, as well as an S/PDIF transmitter. It utilizes an enhanced dual bit architecture that results in wide dynamic range for the ADC, and the advanced multi-bit architecture of the DAC enables wide dynamic range and low out-of-band noise. Two sample-rate converters are integrated, allowing for operation at 48kHz sampling rate with input rates of 32kHz, 44.1kHz, or 48kHz. Volume control, compression, EQ and sound processing are performed by the DSP. In addition, delay adjustment up to 70ms is possible for four output channels through the integrated delay RAM. The AK7770 is packaged in a space-saving 80-pin LQFP package. |
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- Applications: Digital TVs, Active Speakers
- DSP
- Data Width: 24-bit (Data RAM F20.4 floating Point)
- Processing Speed: 13.5 ns (1536step/fs; fs = 48kHz)
- Multiplication: 20 x 16 -› 36-bit Double precision arithmetic available
- Program RAM: 1536 x 36-bit
- Coefficient RAM: 1536 x 16-bit
- Offset RAM: 64 x 14-bit
- DRAM: 14kword (1word = F16.4 floating point)
- Sample Rate: fs = 48kHz
- Master / Slave operation
- 4:2 Selector with Input Pre-amp
- 4ch 24-bit ADC
- 64-times oversampling
- Sample Rate: 48kHz
- S/(N+D): 84dB (fs = 48kHz)
- DR, S/N: 96dB (fs = 48kHz)
- Digital HPF for offset DC cancellation
- Channel independent Digital Volume control (+24/-103dB, 0.5dB step)
- Soft Mute
- 6ch 24-bit DAC
- 128-times oversampling
- Sample Rate: 48kHz
- S/(N+D): 88dB (fs = 48kHz )
- DR, S/N: 100dB
- Channel independent Digital Volume control (+12/-115dB, 0.5dBstep)
- Soft Mute
- Digital de-emphasis
- Stereo Headphone Amplifier with Volume Control
- DAC3 direct connection
- S/(N+D): 73dB (fs=48kHz)
- S/N: 86dB (fs=48kHz)
- Analog volume control (+0/-50dB,1.0/2.0/4.0dB per step)
- Output power: 22.5mW@16
- No click noise at power ON/OFF
- Headphone Detection Circuit (denounce circuit)
- High Tolerance to Clock Jitter
- Sample Rate Converter
- Dual 2ch SRC
- Input sample rate: 32kHz~48kHz
- Output sample rate: 48kHz fixed
- DIT
- S/PDIF, IEC958, AES/EBU, EIAJ CP1201
- Output Selector (DIT or Through)
- 24 bit interface format
- 16 bit interface format
- CMOS Level Digital I/F (for 3.3V)
- Master Clock Input: 256fs (fs=48kHz)
- Master Clock Output: 128fs, 192fs, 256fs, 384fs
- Three Digital Audio Inputs
- I²C
 P I/F
- Power Supply: +3.3V ± 0.3V, +1.8V ± 0.1V
- Temperature Range: -10 ° C~70 ° C
- Package: 80pin LQFP (0.5mm pitch)
- Evaluation Board: AKD7770
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PDF
Download |
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Data Sheet
Rev. MS0699-E-01-PB 2008/06
PDF : 406KB / 22pages |
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| AK7770 BLOCK DIAGRAM |
