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AK7712 参数 Datasheet PDF下载

AK7712图片预览
型号: AK7712
PDF下载: 下载PDF文件 查看货源
内容描述: 内置的20位ADC / DAC先进的音频DSP [Built-in 20-bit ADC/DAC Sophisticated Audio DSP]
分类和应用:
文件页数/大小: 87 页 / 963 K
品牌: AKM [ ASAHI KASEI MICROSYSTEMS ]
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ASAHI KASEI
[AK7712A-VT]
AK7712A-VT
Built-in 20-bit ADC/DAC Sophisticated Audio DSP
General Description
The AK7712A is a DSP(Digital Signal Processor) with built-in high performance 20bit 2ch ADC and 4ch DAC, on
purposeto control the sound field. It is possible to calculate 383 steps on 44.1kHz and 48kHz sampling respectively.
In case of 32kHz sampling, it can caluculate up to 511 steps. With a combination of this LSI and external memory
for delay data,it can berealized easily to control the sound field such as Echo, Surround Presence Controller, and
Key-control which are needed forsomething like Karaoke. Parametric Equalizing can be done without external
memory.
Features
[ DSP unit ]
†
Word length: 24-bit (data RAM)
†
Instruction cycle time: 54ns(maximum speed)
†
Multiplier: 24
×
16
40-bit
†
Divider: 16
÷
16
16-bit
†
Program RAM: 384
×
32 bit
†
External memory: DRAM,Pseudo-SRAM and SRAM can be connected (only use for delay data).
†
Sampling frequency: 32kHz∼48kHz
†
Automatic clear function of external RAM:
47msec after bringing RST high at fs=48kHz (include internal data RAM)
†
Microcomputer interface:
synchronized signal type 8-bit serial input 1 channel,
synchronized signal type 24-bit serial output 1 channel
†
Master clock: 512(511)/384(383)/256(255)fs
The value inside ( ) is maximum calculation steps.
512fs mode is available when 32kHz sampling is chosen.
†
Conversion of master/slave mode for LRCK and BCLK:
When master mode is selected, the outputs of LRCK and BCLK depend
on the set-up for input format.
†
Serial input ports(2~4ch), and output ports(2~6ch) : 16/20/24 bit words
[ ADC unit ]
†
20-bit 64
×
Oversampling
∆Σ
ADC: 2ch
92dB
†
S/(N+D):
98dB
†
DR, S/N:
[ DAC unit ]
†
20-bit 128
×
Oversampling
∆Σ
DAC: 4ch
86dB
†
S/(N+D):
97dB
†
DR, S/N:
†
Digital HPF (fc=1Hz)
[ Total ]
†
Power supply: +5V
100pin LQFP(0.5mm pitch)
†
Package:
0180-E-02
-1 -
1997/12