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.

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)