Evaluates: MAX11501/MAX11502
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• 5V, 150mA DC power supply (VCC)
• Video signal generator
(e.g., Tektronix TG-2000 or similar)
• The appropriate video measurement equipment
Procedure
The MAX11501 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Verify that no shunts are installed across jumpers
JU1, JU2, and JU3 (AC-coupled inputs).
2) Verify that no shunts are installed across jumpers
JU4–JU7 (AC-coupled outputs).
3) Verify that no shunts are installed across jumpers
JU8 and JU9 (normal operating mode).
4) Verify that no shunts are installed across jumpers
JU10, JU11, and JU12 (no DC bias input).
5) Connect the output of the video signal generator to
the CVBSIN BNC connector on the MAX11501 EV kit.
6) Connect the CVBSOUT1 BNC connector on the EV
kit to the input of the video measurement equipment.
7) Connect the power-supply ground to the GND pad
on the EV kit.
8) Connect the 5V supply to the VCC pad on the EV kit.
9) Set the video signal generator for the desired video
input signal. Since the input is AC-coupled and not
biased, the signal should be a unipolar signal such
as R, G, B, or Y.
10) Turn on the power supply and enable the video sig-
nal generator.
11) Analyze the video output signal.
Detailed Description
The MAX11501 EV kit is a fully assembled and tested
surface-mount PCB that contains a MAX11501 IC. The
MAX11501 is a triple video filter and buffer for SDTV
applications. The MAX11501 filter typically has 3dB
attenuation at 8.6MHz and 50dB attenuation at 27MHz.
The device includes a +6dB output buffer capable of dri-
ving a 2VP-P video signal into two standard 150Ωloads.
The MAX11501 EV kit has three input channels to
accept a full set of component video input signals.
Each output from the MAX11501 EV kit is capable of
driving a 75Ωload. This is equivalent to driving two sets
of 150Ωloads in parallel.
All the input and output signals on the MAX11501 EV kit
can be configured for AC- or DC-coupling. The EV kit’s
input terminals are 75Ωterminated and the video out-
put terminals are each back-terminated with 75Ω.
Jumper Selection
Input Coupling (CVBSIN, YIN, and CIN)
The MAX11501 IC features a transparent clamp at the
video inputs that allows either AC- or DC-coupling. If the
input signal remains above ground, the transparent clamp
is inactive, offering true DC input coupling. If the signal
drops below ground, the inputs must be AC-coupled. The
transparent clamp sets the sync tip just below ground.
The MAX11501 EV kit provides an option to configure
the MAX11501 inputs to AC- or DC-coupling. Jumpers
JU1, JU2, and JU3 configure the input coupling for the
MAX11501 EV kit. See Table 1 for shunt positions.
Output Coupling (CVBSOUT1,
CVBSOUT2, YOUT, and COUT)
The MAX11501 EV kit provides an option to configure
the MAX11501 outputs to AC- or DC-coupling. Jumpers
JU4–JU7 configure the output coupling for the
MAX11501 EV kit. See Table 2 for shunt positions.
MAX11501 Evaluation Kit
2 _______________________________________________________________________________________
Table 1. JU1, JU2, and JU3 Jumper
Selection (CVBSIN, YIN, and CIN)
*
Default position.