AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 53

• Manufacturer Part Number: AK4635
• Description: 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

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AK4635 has a Mono Class-D Speaker-Amp. Power supply for Speaker-Amp(SVDD) can be set from 2.2V up to 4.0V.
The Speaker is mono and BTL output, and can drive dynamic speaker and piezo speaker without LPF (filter-less). This
speaker can output 400W@8Ω at SVDD = 3.3V, SPKG bit = “0”. This gain is set by SPKG bit
level of speaker amp is depended on voltage of SVDD and SPKG bit.
The power up/down speaker amp is controlled by PMSPK bit. When PMSPK bit is “0”, the SPP and SPN pins output
VSS3 level. Also ON/OFF of speaker amp is controlled by SPOUTE bit. When SPOUTE bit is “0”, the SPP and SPN pins
are in VSS3-state forcibly. When the outputting from DAC to speaker, PMDAC bit should be set to “1”.
Follow the following sequence.
Rev. 0.6
Speaker Output
P M S P K b it
S P O U T E b it
S P P p in
S P N p in
Figure 47. Power-up/Power-down Timing for Speaker-Amp
Note 39. The signals more than -2dBFS clip.
SPKG bit
0
1
Table 37. SPK- Amp Gain
- 53 -
N o r m a l O u tp u t
N o r m a l O u tp u t
+2dB
Gain
0dB
(Note
39)
(Table
37). The output
[AK4635]
2007/10