AK4687

[AK4687] AK4687 Asynchronous Stereo CODEC with Capless Stereo Selector GENERAL DESCRIPTION The AK4687 is a stereo audio CODEC with 2-channel input selector and a line driver. The interfaces of ADC/DAC can accept up to 24bit input data and support asynchronous operation. The input range of the pre-amplifier, that supports 3ch stereo inputs, is selectable by external resistors. Both the input stereo selector and output drivers support ground reference 2Vrms In/Output, making it possible to remove AC-coupling capacitors and reducing external parts. The AK4687 has a dynamic range of 99dB for ADC, 105dB for DAC. It is well suitable for digital recording systems, digital TVs, Blu-ray recorders and Home theater systems. FEATURES † Asynchronous ADC/DAC Operation † 3:1 Capless Stereo Line Input Selector † 24bit Stereo ADC - 64x Oversampling - Sampling Rate up to 48kHz - Linear Phase Digital Anti-Alias Filter - S/(N+D): 83dB - Dynamic Range, S/N: 99dB - Digital HPF for Offset Cancellation † 24bit Two Stereo DAC - 128x Oversampling - Sampling Rate up to 192kHz - 24bit 8 times Digital Filter - S/(N+D): 95dB - Dynamic Range, S/N: 105dB - De-emphasis Filter † High Jitter Tolerance † External Master Clock Input: 256fs, 384fs, 512fs 768fs (fs=32kHz ∼ 48kHz) 128fs, 192fs, 256fs 384fs (fs=64kHz ∼ 96kHz) 128fs, 192fs (fs=128kHz ~ 192kHz) † 2 Audio Serial I/F (PORT1, PORT2) - Master/Slave mode (PORT1) - I/F format PORT2: MSB, LSB justified (16/24 bit), I2S PORT1: MSB, LSB justified (16/24 bit), ...