AK7714 Datasheet, PDF (1/48 Pages) Asahi Kasei Microsystems – 20-Bit Audio Codec with DSP and Delay RAM

[ASAHI KASEI]
[AK7714]
AK7714
20-Bit Audio Codec with DSP and Delay RAM
General Description
The AK7714 is a highly integrated audio processing IC with 20-bit stereo ADC and 4-channel DAC plus
on-chip DSP with 64-kbit delay RAM. The built-in ADC has a dynamic range of 99 dB with S/(N+D) of 92 dB,
and the DAC has a dynamic range of 98 dB with S/(N+D) of 89 dB, thereby ensuring high performances.
The AK7714 is compatible with each of the sampling frequencies of 48 kHz, 44.1 kHz or 32 kHz, and a
program of 512 steps (when sampling at 44.1 kHz or 32 kHz) can be executed in one sampling time. The
AK7714 is a programmable audio DSP containing RAM for delay. This allows sound field control programs to
be implemented for surround sound, echo 3D, parametric equalizer and the like.
Furthermore, the AK7714 uses a small 100-pin LQFP package, providing the optimum system for the sound
field of car audio equipment which is required to meet space saving requirements.
Features
DSP:
- Word length:
24-bit (Data RAM)
- Instruction cycle time: 44.2 ns
- Multiplier: 24 x 16
40-bit
- Divider: 24 / 24
16-bit
- ALU:
34-bit arithmetic operation (Overflow margin: 4 bits)
24-bit arithmetic and logic operation
- Shift+Register: 1, 2, 3, 4, 8 and 15 bits shifted left
1, 2, 3, 4, (6, 14), 8 and 15 bits shifted right
( )Numbers in parentheses are restricted.
Provided with indirect shift function
- Program RAM: 448 x 32-bit
- Coefficient RAM: 384 x 16-bit
- Data RAM:
128 x 24-bit
- Internal delay memory: 4096 x 16-bit or 2048 x 24-bit
- Sampling frequency: 32 kHz to 48 kHz
- Serial micro controller interface
- Master clock: 512/384/256 fs (512 fs for sampling at 44.1 kHz or 32 kHz)
- Master/slave operation
- Serial signal input port (2 to 6 ch), output port (2 to 6 ch) : 16/20/24-bit
ADC: 2 channels
- 20-bit 64 x Over-sampling delta sigma
- DR, S/N : 99 dB
- S/(N+D) : 92 dB
- Digital HPF (fc = 1 Hz)
DAC: 4 channels
- 20-bit 128 x Over-sampling delta sigma
- DR, S/N : 98 dB
- S/(N+D) : 89 dB
Others
- Power voltage: + 5 V ±5%
- Operating temperature range: -40°C to +85 °C
Package:
100-pin LQFP (0.5 mm pitch)
M0018-E-00
-1-
‘98/07