MAX11505CUB+T Maxim Integrated Products, MAX11505CUB+T Datasheet - Page 6

• Manufacturer Part Number: MAX11505CUB+T
• Description: IC STD VIDEO FILTER 4CH 10UMAX
• Manufacturer: Maxim Integrated Products
• Type: Video Filterr

Specifications of MAX11505CUB+T

• Applications: DVD, Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

All inputs feature transparent clamps that allow either
AC or DC input coupling. The clamp remains inactive
while the input signal is above ground, offering true DC
input coupling. If the signal goes below ground, as
occurs when it is AC-coupled, the clamp sets the sync
tip slightly below the ground level.
The choice of AC- or DC-coupling the input depends
on the video source. Many DACs provide a current
output and are terminated to ground with a resistor;
such signals are conveniently DC-coupled. Use AC-
coupling when the DC level of the video signal is
unknown or outside the specified input range of the
MAX11504/MAX11505, such as SCART or V
nated DAC outputs.
If the input is DC-coupled, the input voltage must
remain above zero but not exceed the maximum input
voltage of 1.4V (typical).
Four-Channel, Standard-Definition
Video Filters
Figure 2. Typical DC-Coupled Signal
6
_______________________________________________________________________________________
1.02V
0.32V
0.02V
0V
INPUT SIGNAL
Transparent Clamps
DC-Coupled Inputs
Input Coupling
CC
-termi-
IN_
MAX11504
MAX11505
If the input is AC-coupled, the transparent clamps are
active and set the lowest point of the signal at ground.
This is appropriate for unipolar signals such as Y, R, G,
or B with or without sync pulse (Figure 3).
Figure 3. Simple AC-Coupling for Unipolar Signals (Y, R, G, B)
OUT_
ENCODER
DAC
2.32V
0.92V
0.32V
0.1µF
OUTPUT SIGNAL
IN_
AC-Coupled Inputs
MAX11504
MAX11505