MAX9512 Maxim Integrated Products, MAX9512 Datasheet - Page 15

• Manufacturer Part Number: MAX9512
• Description: Video Filter Amplifier
• Manufacturer: Maxim Integrated Products

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The outputs can be AC-coupled since the output stage
can source and sink current as shown in Figure 6.
Coupling capacitors should be 220µF or greater to
keep the highpass filter formed by the 150Ω equivalent
resistance of the video transmission line to a corner fre-
quency of 4.8Hz or below. The frame rate of PAL sys-
tems is 25Hz, and the frame rate of NTSC systems is
30Hz. The corner frequency should be well below the
frame rate.
Figure 6. AC-Coupling at the Outputs
VIDEO ENCODER
CURRENT
CURRENT
DAC
DAC
+3.3V
0V
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Video Filter Amplifier with SmartSleep
SMARTSLEEP
AC-Coupling the Outputs
SHDN
CIN
YIN
BUFFER
BUFFER
MAX9512
ACTIVE VIDEO
CONTROL
DETECT
LOGIC
LPF
LPF
+3.3V
GND
V
DD
The MAX9512 operates from a single-supply voltage
down to 2.7V, allowing for low-power operation. Bypass
V
components as close to the device as possible.
DD
and Y/C Mixer Circuit
to GND with a 0.1µF capacitor. Place all external
0.1µF
6dB
6dB
6dB
6dB
Power-Supply Bypassing and Ground
LOAD SENSE
LOAD SENSE
LOAD SENSE
LOAD SENSE
YOUT
CVBSOUT1
CVBSOUT2
COUT
75Ω
75Ω
75Ω
75Ω
220µF
220µF
220µF
220µF
CHROMA
LUMA
CVBS1
CVBS2
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