AKM AK4482 24位数字音频数模转换解决方案

AKM公司的AK4482 是用于数字音频设备的高性价比的两路24位Sigma-Delta 数模转换器(DAC),采用AKM的多比特架构,具有很宽的动态范围,达到111dB,THD+N为-100dB,电源电压4.75 ∼ 5.25V,支持216kHz取样速率,非常适合BD和AC-3放大器系统.本文介绍了AK4482主要特性,方框图,典型应用框图,外接LPC滤波器电路图以及评估板AKD4482-SB框图和电路图.

The AK4482 is a cost-effective 24-bit DAC for digital audio equipments. The modulator uses AKM’s multi-bit architecture, delivering wide dynamic range. The AK4482 has fully differential switched-cap filter outputs, removing the need for AC coupling capacitors and increasing performance for systems with excessive clock jitter. The AK4482 support up to 216kHz sampling rate, ideal for BD and AC-3 amplifier systems. It is housed in a space saving 16pin TSSOP package.

AK4482主要特性:

􀂆 Sampling Rate: 8kHz ∼ 216kHz

􀂆 128 x Over Sampling (Normal Speed Mode)

􀂆 64 x Over Sampling (Double Speed Mode)

􀂆 32 x Over Sampling (Quad Speed Mode)

􀂆 24 Bit 8 x FIR Digital Filter

- High Quality Sound Short Delay Sharp Roll-off Filter (less than 6/fs)

- High Quality Sound Short Delay Slow Roll-off Filter (less than 6/fs)

- Sharp Roll-off Filter

- Slow Roll-off Filter..

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