AK4687 Datasheet, PDF (1/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Stereo Selector

[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), I²S
† Hardware / I²C-bus Control
† Operating Voltage:
- Digital I/O and Charge Pump: 3.0V ∼ 3.6V
- ADC Analog: 3.0V ∼ 3.6V
- DAC Analog: 3.0V ∼ 3.6V
† Package: 48pinLQFP
MS1307-E-00
-1-
2011/05