| Audio
Processor |
| AK7780 |
| Floating Point Audio DSP with
24-Bit 5ch ADC and SRC |
| The AK7780 is a highly integrated
audio processor, including a 28-bit floating point DSP, two 24-bit stereo
ADC’s and one mono ADC. The stereo ADC’s achieve high performance
96dB dynamic range and include 8:1 input selectors. The ADC supports sampling
frequency from 7.35 kHz to 96 kHz. The AK7780 also includes a stereo sample
rate converter (SRC), so it can be used as a master device when it receives
digital audio inputs. The DSP includes 168kbits of SRAM for audio delay
data that is suitable for creating simulated surround fields. The programmable
DSP block is realized with 2560step/fs DSP. It supports sampling frequencies
from 7.35kHz to 96 kHz. The AK7780 is used to implement complete sound field
control, such as echo, 3D, parametric equalization, and other sound enhancements.
It is packaged in a 100-lead LQFP package. |
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- Application: Car Audio
- DSP: Main
· Word length: 28-bit (Data RAM F24.4 limited range floating
point)
· Instruction cycle time: 8.1 ns (2560step/fs fs=48kHz; 1280step/fs
fs=96kHz)
· Multiplier: 24 × 16 
40-bit (Double precision available)
· Divider: 24 / 24
24-bit
· ALU: 44-bit arithmetic operation (overflow margin: 4-bits)
 F24.4 arithmetic and logic
operation
· Shift+Register: Flexible setting
· Program RAM: 2048 × 36-bit
· Coefficient RAM: 2048 × 16-bit
· Data RAM: 2048 × 28-bit (F24.4[sign bit + 23-bit mantissa
+ 4-bit exponent])
· Offset RAM: 64 × 13-bit
· Internal Delay RAM: 168kbits
4 patterns of setting
6144 × 28 bit
2048 × 28 bit + 8192 x
14 bit
3072 × 28 bit + 6144 x
14 bit
4096 × 28 bit + 4096 x
14 bit
28bit = F24.4 [24 bit sign
& mantissa: 4 bit exponent]
14bit = F10.4 [10 bit sign
& mantissa: 4 bit exponent]
· Sampling frequency: 7.35kHz ~ 96kHz
· Serial interface port for microcontroller or I²C BUS control
· Master Clock: 2560fs (generated by PLL from 32fs ,64fs, 256fs
and 384fs)
· Master/Slave operation
· Serial signal input port (10ch):
MSB justified 24-bit / LSB
justified 16/20/24-bit and I²S
· Serial signal output port(12ch):
MSB justified 24-bit / LSB
justified 24,16-bit and I²S
- ADC: 4 channels (2 stereo pairs)
· 24-bit 64X over-sampling delta-sigma (fs = 7.35kHz ~ 96kHz)
· DR, S/N: 96dBA (fs = 48kHz, fully-differential input)
· S/(N+D): 92dB (fs = 48kHz)
· Digital HPF (fc = 1Hz)
- ADC: Mono single channel
· 24-bit 64X over-sampling delta sigma (fs = 7.35kHz ~ 96kHz)
· DR, S/N: 95dBA (fs = 48kHz)
· Includes digital attenuator
- SRC: Stereo pair
· Input frequency 7.35kHz ~ 96kHz
Output frequency 44.1kHz ~ 96kHz
- Power supply: +3.3V ±0.3V, +1.7V~+2.0V(typ +1.8V)
- Operating temperature range: -40°C~85°C
- Package: 100pin LQFP (0.5mm pitch)
- Evaluation Board: AKD7780
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PDF
Download |
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Data Sheets
Rev. MS0581-E-00-PB 2007/09
PDF : 508KB / 28pages |
|
Evaluation Board Manual
Rev. KM090600 2007/09
PDF : 1372KB / 48pages |
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| AK7780 BLOCK DIAGRAM |
