AK4566 Datasheet, PDF (24/45 Pages) Asahi Kasei Microsystems – 20bit Stereo CODEC with built-in IPGA & HP-AMP

ASAHI KASEI
AKM CONFIDENTIAL
[AK4566]
3) DAC → MOUT
Power Supply
PDN pin
HPLMT,
HPRMT bit
PMVCM bit
Clock Input
(1) >150ns
(2)
>0
(4)
Don’t care
Don’t care
Don’t care
PMDAC bit
DAC Internal
State
SDTI pin
PMMO bit
ATTL/R7-0 bit
(3) >0
PD(Power-down)
00H(MUTE)
Normal Operation
PD
Normal Operation
FFH(0dB)
00H(MUTE)
FFH(0dB)
MMUTE,
ATTM3-0 bit
MOUT pin
10H(MUTE)
0FH(0dB)
(6) GD (7) 1061/fs (6) (7)
(Hi-Z)
(5)
(5)
(5)
(Hi-Z)
Figure 19. Power-up/down sequence of DAC and MOUT
(6) (7)
(1) PDN pin should be set to “H” at least 150ns after the power is supplied.
(2) HPLMT, HPRMT and PMVCM bits should be changed to “1” after PDN pin goes to “H”.
(3) PMDAC and PMMO bits should be changed to “1” after HPLMT, HPRMT and PMVCM bits are changed to “1”.
(4) External clocks (MCLK, BICK, LRCK) are needed to operate DAC. When PMDAC= “0”, these clocks can be
stopped. MOUT buffer can operate without these clocks.
(5) When PMMO bit is changed to “1”, click noise is output from MOUT pin.
(6) Analog output corresponding to digital input has the group delay (GD) of 16.8/fs(=381µs@fs=44.1kHz).
(7) ATS bit sets transition time of digital attenuator. Default value is 1061/fs(=24ms@fs=44.1kHz).
REV 0.5
- 24 -
2002/2