AK7742
AK7742 is 24Bit 2ch ADC + 24Bit 4ch DAC manufactured by Asahi Kasei Microdevices.
[AK7742]
= Preliminary =
24bit 2ch ADC + 24bit 4ch DAC with Audio DSP
GENERAL DESCRIPTION The AK7742 is a highly integrated audio digital processor, including two stereo 24bit DAC’s and one stereo ADC with input selector. The stereo DAC and ADC feature high performance, archiving 106d B and 96d B dynamic range respectively, 8k Hz to 96k Hz sampling rate are supported. The audio DSP has 1536step/fs parallel processing power, and 74k-bit delay memory allows surround processing, acoustic .. effect and parametric equalizers. As the AK7742 is a RAM based DSP, it is programmable for user requirements. The AK7742 is available in a space saving small 48pin LQFP package. Features
- DSP:
- Word length: 24bit (Data RAM 24bit floating point)
- Instruction cycle: 13.6 ns (1536step/fs fs=48k Hz; 9216step/fs fs=8k Hz)
- Multiplier 20 x 16 → 36bit (double precision available)
- Divider 20 / 20 → 20bit
- ALU: 40bit arithmetic operation (overflow margin 4bit) 24bit floating point arithmetic and logic operation
- Program RAM: 1536 x 36bit
- Coefficient RAM: 1536 x 16bit
- Data RAM: 1536 x 24-bit (24bit floating point)
- Delay RAM: 74kbit (3072 x 24bit)
- Sampling frequency: 8k Hz ~ 96k Hz
- Master / Slave operation
- Serial signal input port (4ch) MSB justified 24bit / LSB justified 24 / 20 / 16bit and I2S
- Serial signal output port (6ch) MSB justified 24bit / LSB justified 24 / 16bit and I2S ADC: 2ch (stereo)
- 24bit 64 x Over-sampling delta sigma (fs=8k Hz~48k Hz)
- DR, S/N: 96d B (fs=48k Hz, fully differential input)
- S/(N+D): 84d B (fs=48k Hz)
- Differential, Single-end Inputs
- Digital HPF (fc=1Hz)
- 3:1 Analog input selector
- Digital Volume (24d B~-103d B, 0.5d B Step, Mute) DAC: 4ch (two stereo pairs)
- 24bit 128 x Over-sampling advanced multi-bit (fs=8k Hz~96k Hz)
- DR, S/N: 106d B
- S/(N+D): 92d B
- Differential output
- Digital Volume (24d B~-103d B, 0.5d B Step, Mute) DSP Through...
