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| AK4616单片音频24位CODEC解决方案 |
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| 文章来源： 更新时间：2014/5/22 10:09:00 |
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AKM公司的AK4616是单片音频24位CODEC,集成了三路ADC和五路DAC,模拟输入支持差分/单端输入.ADC的S/N达到99dB,S/(N+D)为88dB,取样频率从8kHz到48kHz.DAC动态范围105dB,集成了全范围数字音量控制,和音频DSP就能构成汽车音频系统.本文介绍了AK4616主要特性,框图以及评估板AKD4616-A功能,框图和电路图.
The AK4616 is a single chip audio CODEC that includes three channel ADCs and five channel DACs. The analog inputs support differential/single-ended with 4:1 stereo selector in front of 2-channel 99dB ADC, and monaural ADC for guidance sound. The high performance 5-channel DAC integrates full-range digital volume control and achieves 105dB dynamic range. A car audio system can be easily designed with an audio DSP and the AK4616. The AK4616 is housed in a space saving 48-pin LQFP package.
AK4616主要特性:
• 2ch ADC
- Sampling Frequency: 8KHz to 48KHz
- 4 System in / 1 out (Diffrentialx3, single endx1)
- ADC S/N: 99dB, S/ (N+D): 88dB
- I/F format: MSB justified, I2S or TDM
• 1ch ADC for Monaural Audio Input
- Sampling Frequency: 8KHz to 48KHz
- ADC S/N: 97dB, S/ (N+D): 87dB
- I/F format: MSB justified, I2S or TDM
• 4ch DAC
- Sampling Frequency: 8KHz to 48KHz
- DAC S/N: 105dB, S/ (N+D): 95dB
- I/F format: MSB justified, LSB justified (16bit, 20bit, 24bit), I2S or TDM
• Monaural DAC
- Sampling Frequency: 8KHz to 48KHz
- DAC S/N: 107dB, S/ (N+D): 100dB
- I/F format: MSB justified, LSB justified (16bit, 20bit, 24bit), I2S or TDM
• Microphone Interface
- Differential
- Programmable Gain (+33dB to +15dB and 0dB, 3dB step)
- Low Noise Microphone Bias
• Digital Processing
- Individual Channel Independent Digital Volume for DAC (0dB to -127dB, 0.5dB step)
- Monaural Audio Input Mixing and Individual Channel Digital Volume for ADC (0dB to -127dB, 0.5dB step)
- Soft mute
• Master Clock
- 256fs, 384fs, 512fs
• μP I/F: I2C-slave
• Power Supply
- Analog Power Supply: A3V31,A3V32 = 3.0V to 3.6V (typ.3.3V)
- Digital Power Supply1: D3V3 = 3.0V to 3.6V (typ.3.3V)
- Digital Power Supply2: D1V8 = 1.7 to 1.9V (typ.1.8V)
• Operating temperature range: -40℃ to 85℃
• Package: 48-pin LQFP
图1. AK4616框图
评估板AKD4616-A
The AKD4616-A is an evaluation board for AK4616, which is a 24bit CODEC including 3ch ADC, 5ch DAC and microphone amplifier. The control settings of this board may be controlled via USB port, allowing for easy A/D and D/A evaluation. RCA connectors are used for the input and output of the analog signals. This board
评估板AKD4616-A功能:
Clock generate circuits (AK4118A used)
Compatible with 2 types of digital audio interface
- Optical input (x1) / Optical output (x1)
- 10pin header for interface with external data source
RCA connector for external clock input
ADC 3ch input, DAC 5ch output
USB port and 10pin header for board control
图2. 评估板AKD4616-A框图
图3. 评估板AKD4616-A平面图
图4. 评估板AKD4616-A电路图(1)
图5. 评估板AKD4616-A电路图(2)
图6. 评估板AKD4616-A电路图(3)
图7. 评估板AKD4616-A电路图(4)
图8. 评估板AKD4616-A电路图(5)
图9. 评估板AKD4616-A电路图(6)
图10. 评估板AKD4616-A电路图(7)
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