ak4569 AKM Semiconductor, Inc., ak4569 Datasheet - Page 25

• Manufacturer Part Number: ak4569
• Description: 20-bit Stereo Codec With Ipga & Hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
4) LIN/RIN/MIN → HP-amp, MOUT
(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) PMHPL, PMHPR, PMMO bits should be changed to “1” and HPLMT, HPRMT bits should be changed to “0” after
(4) When PMHPL, PMHPR or PMMO bit is changed to “1”, LIN, RIN and MIN are biased to VCOM voltage. Rising
(5) Rise time of headphone amp is determined by external capacitor of MUTET pin. When C=1µF,
(6) Fall time of headphone amp is determined by output capacitor for AC coupling. When C=100µF,
(7) When PMMO bit is changed to “1”, pop noise is output from MOUT pin.
MS0292-E-01
HPLMT, HPRMT, PMVCM bits are changed to “1”. Once PMHPL and PMHPR bits are changed to “1”, HPLMT
and HPRMT bits should be inverted from PMHPL and PMHPR bits respectively.
time constant is determined by input capacitor for AC coupling and input resistance 50kΩ (typ). In case of 0.1µF
input capacitor, time constant is
HPL/R pin
MMUTE,
ATTM3-0 bit
MOUT pin
Power Supply
PDN pin
PMVCM bit
PMHPL/R bit,
PMMO bit
HPLMT,
LIN/RIN/MIN pin
HPRMT bit
Figure 20. Power-up/down sequence of LIN/RIN/MIN, HP-amp and MOUT
10H(MUTE)
(1) >150ns
(Hi-Z)
(Hi-Z)
Rise Time Constant of Headphone Amp: τ = 100ms
Fall Time Constant of Headphone Amp: τ = 200ms
(2) >0
(3) >0
(4)
(5)
τ = 0.1µF x 50kΩ = 5ms (typ)
(7)
- 25 -
(6)
0FH(0dB)
(7)
Don’t care
(Hi-Z)
(Hi-Z)
(5)
(7)
[AK4569]
2005/07