MAX11500USA+T Maxim Integrated Products, MAX11500USA+T Datasheet - Page 5

• Manufacturer Part Number: MAX11500USA+T
• Description: IC HD VIDEO FILTER 3CH 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Video Filterr

Specifications of MAX11500USA+T

• Applications: DVD, HD, Set-Top Boxes, Recorders
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

If the input is AC-coupled, the transparent clamp will be
active and sets the sync tip or the lowest voltage of the
signal close to ground. This clamping behavior is
appropriate for unipolar signals such as Y, R, G, or B
with or without sync pulse (Figure 3).
For bipolar signals such as Pb, Pr signals, the AC-coupled
inputs should be biased to a fixed DC voltage to ensure
that the transparent clamp never turns on. A suitable
network that biases the input to typically 0.59V is shown
in Figure 4. The device has an input leakage current
(I
derived as follows:
The internal filters are optimized to deliver a flat pass-
band along with high stopband attenuation. The filter
characteristic has been chosen to provide an excellent
time-domain response with low overshoot. The typical
-3dB frequency of 33MHz guarantees low attenuation
in the passband, while at the same time allowing for a
typical attenuation of -48dB at 74.25MHz.
Figure 2. Typical DC-Coupled Signal
L
) of typically 0.5µA and thus the bias voltage is
1.02V
0.32V
0.02V
0.00V
V
Three-Channel, High-Definition Video Filter
B
=
_______________________________________________________________________________________
R
1
R
+
2
R
2
INPUT SIGNAL
(
V
CC
−
AC-Coupled Inputs
I x R
L
1
HD Filters
)
IN_
MAX11500
Figure 3. AC-Coupling for Unipolar Signals (Y, R, G, B)
Figure 4. AC-Coupling for Bipolar Signals (Pb, Pr)
OUT_
ENCODER
DAC
ENCODER
DAC
2.59V
1.19V
0.59V
0.1µF
0.1µF
R2
120kΩ
V
CC
OUTPUT SIGNAL
R1
820kΩ
IN_
MAX11500
IN_
MAX11500
5