ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 10

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

(VSS1, VSS2, VSS3=0V; Note 4)
Parameter
Power Supplies
Note 4. All voltages with respect to ground.
Note 11. The power-up sequence among AVDD, DVDD, TVDD, and HVDD is not critical. PDN pin should be held to
* AKEMD assumes no responsibility for the usage beyond the conditions in this datasheet.
MS0625-E-01
(Note 11) Digital
“L” upon power-up. PDN pin should be set to “H” after all power supplies are powered-up.The AK4648 should be
operated by the recommended power-up/down sequence shown in “System Design (Grounding and Power Supply
Decoupling)” to avoid the pop noise at speaker output, line output and headphone output.
When the power state is changed from OFF to ON in the above cases, the PDN pin should be
The AK4648 supports the following two cases of partial power ON/OFF. In these cases, the
PDN pin must be “L”.
changed from “L” to”H” after all power supply pins are supplied. “L” time of 150ns or more is
needed to reset the AK4648.
1. TVDD=HVDD=ON: AVDD=DVDD can be power ON/OFF.
2. TVDD=ON: AVDD=DVDD=HVDD can be power ON/OFF.
Analog
Digital I/O
HP/SPK-Amp
Difference
RECOMMENDED OPERATING CONDITIONS
AVDD−DVDD
Symbol
AVDD
DVDD
HVDD
TVDD
- 10 -
−0.3
min
2.6
2.6
1.6
2.6
typ
3.3
3.3
3.3
3.6
0
DVDD
max
+0.3
3.6
3.6
5.0
[AK4648]
Units
2007/06
V
V
V
V
V