AK4456 Datasheet, PDF (62/84 Pages) Asahi Kasei Microsystems – 115dB 768kHz Advanced 32-bit DAC

[AK4456]
■ Synchronization Function (PCM Mode)
● Synchronization Function (Analog Output Phase Synchronization)
This function synchronizes analog output phase by suppressing the phase difference of the AK4456 and other
AKM devices with synchronization function to within 3/256fs. Analog output phase synchronization function
becomes valid when input data at all channels are continuously “0” for 8192 times if SYNCE bit is set to “1”
during operation in PCM mode or when RSTN bit is set to “0”.
Example) In the case of using the AK4456 with the AK4452 (Figure 62)
The AK4452 and the AK4456 have synchronization function. The output phase difference between the
AK4452’s output (AOUT1LP/N_2, AOUT1RP/N_2) and the AK4456’s output (AOUT1-3LP/N_6,
AOUT1-3RP/N_6) will be within 3/256fs.
DSP
MCLK
LRCK
AK4452
MCLK AOUT1LP/N
LRCK AOUT1RP/N
AOUT1LP/N_2
AOUT1RP/N_2
AK4456
MCLK AOUT1LP/N
LRCK AOUT1RP/N
AOUT3LP/N
AOUT3RP/N
AOUT1LP/N_8
AOUT1RP/N_8
AOUT3LP/N_8
AOUT3RP/N_8
Figure 62. System Example of Clock Synchronization Function
015006886-E-00
- 62 -
2015/06