AK4204 Datasheet, PDF (7/13 Pages) Asahi Kasei Microsystems – Stereo Cap-less LINE-Amp and Video-Amp

[AK4204]
OPERATION OVERVIEW
■ Charge Pump Circuit
Internal negative power supply circuit (Figure 3) supplies the negative voltage to the video amp, and the video amp 0V
output is used for a pedestal level (Figure 4 and Figure 5). Therefore, the output coupling capacitor can be removed.
AK4204
VDD1
Charge
Pump
Negative Power
CP
CN VSS1
VEE
C2
(+)
1 0uF
1uF C1
(+)
Figure 3. Charge Pump Circuit
Note 9. C1 and C2 should be low ESR (Equivalent Series Resistance) capacitors. When these capacitors are polarized,
the positive polarity pins should be connected to the CP or VSS1 pin.
AK4204
0V
ROUT
(LOUT)
2 Vrms
Figure 4. Audio Signal Output
AK4204
7 5Ω
VOUT
75Ω
0V
Figure 5. Video Signal Output
Rev. 0.1
2012/02
-7-