AKM公司的AK4629是高性能多路音頻CODEC,包括四路24位ADC和八路24位DAC通路,ADC采用增強(qiáng)雙比特架構(gòu),DAC采用先進(jìn)的多比特架構(gòu),具有非常低的噪音性能.ADC的取樣速率高達(dá)96kHz,DAC的取樣頻率高達(dá)192kHz,ADC的S/(N+D)為92dB,動(dòng)態(tài)范圍S/N為102dB(單端輸入),DAC的S/(N+D)為90dB,動(dòng)態(tài)范圍S/N為102dB,主要用在家庭影院,pro audio音響和汽車音響設(shè)備.本文介紹了AK4629主要特性, 方框圖, 典型應(yīng)用電路圖以及電源連接案例,AKD4629-A評(píng)估板主要功能,框圖,電路圖和元件布局圖.
AK4629: High Performance Multi-channel Audio CODEC
The AK4629 is a single chip audio CODEC that includes four ADC channels and eight DAC channels.
The converters are designed with Enhanced Dual Bit architecture for the ADC’s, and Advanced Multi-Bit architecture for the DAC, enabling very low noise performance. The AK4629 ADC supports both single-ended and differential inputs and outputs. A wide range of applications can be realized, including home theater, pro audio and car audio. The AK4629 is available in a 48-pin LQFP package.
AK4629主要特性:
4ch 24bit ADC
- 64x Oversampling
- Sampling Rate up to 96kHz
- Linear Phase Digital Anti-Alias Filter
- Single-ended / Differential Input
- S/(N+D): 92dB (Single-ended, Differential)
- Dynamic Range, S/N: 102dB (Single-ended), 103dB (Differential)
- Digital HPF for offset cancellation
- I/F format: MSB justified, I2S or TDM
8ch 24bit DAC
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- Single-ended Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 90dB
- Dynamic Range, S/N: 106dB
- I/F format: MSB justified, LSB justified(20bit,24bit), I2S or TDM
- Individual channel digital volume with 128 levels and 0.5dB step
- Soft mute
- De-emphasis for 32kHz, 44.1kHz and 48kHz
- Zero Detect Function
High Jitter Tolerance
TTL Level Digital I/F
3-wire Serial and I2C Bus μP I/F for mode setting
Master clock: 256fs, 384fs or 512fs for fs=32kHz to 48kHz
128fs, 192fs or 256fs for fs=64kHz to 96kHz
128fs for fs=120kHz to 192kHz
Power Supply: 4.5 to 5.5V
Power Supply for output buffer: 2.7 to 5.5V
Small 48pin LQFP
圖1. AK4629方框圖
圖2. AK4629典型應(yīng)用電路圖
圖3. AK4629電源連接案例
AKD4629-A評(píng)估板
The AKD4629-A is an evaluation board for the AK4629, a single chip CODEC that includes four channels of ADC and six channels of DAC. The AKD4629-A also has the digital audio interface and can achieve the interface with digital audio systems via opt-connector or BNC connector.
AKD4629-A評(píng)估板功能:
• On-board analog output buffer circuit
• Compatible with 2 types of interface
- AK4118 (DIT&DIR) with optical output/input and BNC output/input
- Direct interface with AC3 decoder by 10pin header
• 10pin header for serial control interface
圖4.AKD4629-A評(píng)估板方框圖
圖5.AKD4629-A評(píng)估板電路圖(1)
圖6.AKD4629-A評(píng)估板電路圖(2)
圖7.AKD4629-A評(píng)估板電路圖(3)
圖8.AKD4629-A評(píng)估板電路圖(4)
圖9.AKD4629-A評(píng)估板電路圖(5)
圖10.AKD4629-A評(píng)估板電路圖(6)
圖11.AKD4629-A評(píng)估板元件布局圖 |
