ASAHI KASEI
[AK4632]
RECOMMENDED OPERATING CONDITIONS
(AVSS, DVSS, SVSS=0V; Note 1)
Parameter
Symbol
min
typ
Power Supplies Analog
AVDD
2.6
3.3
(Note 6)
Digital
DVDD
2.6
3.3
Speaker-Amp (Note 7)
SVDD
2.6
3.3 / 5.0
Video (Note 8)
VVDD
2.8 or AVDD
3.3 / 5.0
Difference
AVDD-DVDD
-0.3
0
max
3.6
3.6
5.25
5.25
0.3
Units
V
V
V
V
V
Note 1. All voltages with respect to ground
Note 6. The power up sequence between AVDD, DVDD and SVDD is not critical.
When the power supplies are partially powered OFF, the AK4632 must be reset by bringing PDN pin
“L”
after
these power supplies are powered ON again.
Note 7. SVDD = 2.6
∼
3.6V when 8Ω dynamic speaker is connected to the AK4632. If SVDD is more than 3.6V when
8Ω dynamic speaker is connected to the AK4632, the output of Speaker-Amp should be restricted in consideration
of maximum power dissipation as the following.
SPoMax
SPKMPD
Rmin
Vmax
: Maximum Output Power of SPK-Amp[mW]
: Maximum Power Dissipation of SPK-Amp[mW]
: Minimum Impedance of speaker[Ω]
: Maximum permission output voltage of SPK-Amp[Vrms]
SPKMPD = 700 – AVDD(max) x 17.5 – VVDD(max) x 12 – SVDD(max) x 27
A = 2 x sqrt(2) x SVDD(max) /
π
B = A x A – 4 x Rmin x SPKMPD / 1000
Vmax= (A – sqrt(B)) / 2
SPoMax = 1000 x Vmax x Vmax / Rmin
Maximum Output Power of SPK-Amp at B < 0 : No limitation
Maximum Output Power of SPK-Amp at B
≥
0: This power should be less than or equal to
SPoMax[mW].
Regardless of the condition of B, the distortion of output signal increases, when SPK-Amp output power
exceeds 240mW.
Note 8. Minimum value is higher value between 2.8V and AVDD[V].
* AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
MS0396-E-00
-6-
2005/06
AKM [ ASAHI KASEI MICROSYSTEMS ]
