ak4635ecb AKM Semiconductor, Inc., ak4635ecb Datasheet - Page 58

• Manufacturer Part Number: ak4635ecb
• Description: 16-bit Mono Codec With Alc & Mic/spk/video-amp
• Manufacturer: AKM Semiconductor, Inc.

L
Video-Amp has a drivability for a load resistance of 150 . The AK4635 has a composite input and output. A Low Pass
Filter (LPF) and Gain Control Amp (GCA) are integrated and both DC output and Sag Compensation circuit are
supported as shown in
47µF+4.7µF. When DC output is used, the VOUT pin and the VSAG pin must be shorted. The output clamp voltage is 50
mV(typ) at DC output. SAGC bit should be set as shown in
SAGC bit = “1”. The gain can be set by VGCA4-0 bits. PMV bit controls the power up and down of the video block. The
VOUT pin outputs VSS1 level at PMV bit = “0”.
Rev. 0.6
Video Block
VIN
VIN
Figure 51
CLAMP
CLAMP
(C1=100 F, C2=4.7 F) or (C1=47 F, C2=4.7 F)
Figure 51 Video block (using Sag Compensation circuit)
and
Figure
Figure 52. Video block (at DC Output)
52. The capacitance for Sag Compensation circuit is 100µF+4.7µF or
LPF
LPF
-1dB ~ +10.5dB
Step 0.5dB
-1dB ~ +10.5dB
Step 0.5dB
- 58 -
GCA
GCA
Table
45.VSAG2-0 bits should be set as shown in
+6dB
+6dB
VOUT
VOUT
VSAG
VSAG
C1
C2
75
75
Table 46
[AK4635]
2007/10
at