AKM AK4558 32位数字音频系统CODEC解决方案

AKM公司的AK4558是低电压32位216kHz数字音频系统编译码器(CODEC),支持各种信号,具有较好的带外噪音和低功耗,主要用在高档音响设备和电子乐器以及音频接口.本文介绍了AK4558主要特性和框图,系统连接框图以及评估板AKD4558-A功能,框图,电路图和PCB元件布局图.
The AK4558 is a low voltage 32bit 216kHz CODEC for high performance battery powered digital audiosubsystems. An internal circuit includes newly developed 32-bit Digital Filter achieving short group delayand high quality sound. In addition, “OSR-Doubler” technology is newly adopted, making the AK4558capable of supporting wide range signals and achieving low out-of-band noise while realizing low powerconsumption. The AK4558 is ideal for a wide range of applications that demands high sound qualityincluding Electronic musical instruments and Audio Interfaces. The analog inputs and outputs aresingle-ended to minimize pin count and external filtering requirements. The AK4558 is housed in a verysmall 28-pin QFN. It is ideal for space-sensitive applications.
AK4558主要特性:
 Single-ended ADC
- Dynamic Range, S/N: 108dB@AVDD=3.3V
- S/(N+D): 92dB@AVDD=3.3V
- Selectable HPF for DC-offset cancel (fc = 1Hz @ fs=48kHz)
- 4-types Digital Filter for High Sound Quality
 Single-ended DAC
- Dynamic Range, S/N: 108dB@AVDD=3.3V
- S/(N+D): 100dB@AVDD=3.3V
- Digital de-emphasis for 32kHz, 44.1kHz and 48kHz sampling
- 5-types Digital Filter for High Sound Quality
- Channel Independent Digital Attenuator (256 levels, 0.5dB steps)
 Audio I/F format: MSB First, 2’s Complement
- ADC: 24/32bit MSB justified , 24/32bit I2S compatible or TDM
- DAC: 24/32bit MSB justified, 16/20/24/32bit LSB justified,
24/32bit I2S compatible or TDM
 Input/Output Voltage: ADC = 2.64Vpp @ AVDD=3.3V
DAC = 2.51Vpp @ AVDD=3.3V
 Master/Slave mode
 P I/F: I2C Bus
 Sampling Rate:
(1) PLL Mode
• PLL Slave Mode (LRCK pin): fs = 8kHz&#...