MAX11503EVKIT View Datasheet(PDF) - Maxim Integrated
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MAX11503EVKIT Datasheet PDF : 6 Pages
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MAX11503 Evaluation Kit
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• 3V DC power supply
• Video signal generator (e.g., Tektronix TG2000 or
similar)
• Video measurement equipment (e.g., Tektronix
VM700A or similar)
Procedure
The MAX11503 EV kit is a fully assembled and tested
surface-mount PCB. Follow the steps below to verify
board operation. Caution: Do not turn on the power
supply until all connections are completed.
1) Verify that a shunt is installed across pins 1-2 of
jumper JU1 (power-up).
2) Verify that a shunt is installed across pins 2-3 of
jumper JU2 (summer is enabled).
3) Connect the output of the video signal generator to
the Y_IN (luma) and C_IN (chroma) BNC connectors
on the EV kit.
4) Connect the composite CVBS video output signal
from the OUT BNC connector on the EV kit to the
input of the video measurement equipment.
5) Connect a 3V supply to the VCC pad. Connect the
supply ground to the GND pad.
6) Set the video signal generator for the desired video
input signals. This signal must contain sync informa-
tion (i.e., composite or Y).
7) Turn on the power supply and enable the video sig-
nal generator.
8) Analyze the output signal with the VM700A video
measurement equipment.
Detailed Description
The MAX11503 EV kit evaluates the MAX11503 3V
operation video amplifier with Y/C summer and a chro-
ma mute that can drive two terminated 75Ω video
loads. The MAX11503 EV kit accepts AC-coupled Y
(luma) and C (chroma) input signals summing them into
a composite CVBS output signal with gain of +6dB.
Jumper Selection
The EV kit incorporates jumper JU1 to control the
PSAVE pin. The PSAVE pin puts the device into a low-
power mode. See Table 1 for jumper JU1 settings.
Table 1. Jumper JU1 Settings
SHUNT
POSITION
PSAVE PIN
1-2*
Connected to VCC
2-3
Connected to GND
*Default position.
MAX11503 OUTPUT
Enabled
Disabled
The EV kit incorporates jumper JU2 to control the
CMUTE pin. The CMUTE pin provides options to enable
or disable the chroma input signal from the summer.
See Table 2 for jumper JU2 settings.
Table 2. Jumper JU2 Settings
SHUNT
POSITION
1-2
2-3*
CMUTE PIN
Connected to VCC
Connected to GND
*Default position.
MAX11503 OUTPUT
Y (luma) signal
Composite CVBS
signal
Input Signals
The MAX11503 accepts either DC- or AC-coupled luma
input signals that are selected with jumpers JU3 and
JU4, as shown in Table 3. The MAX11503 is configured
for AC-coupled inputs by default. When using DC-cou-
pled inputs, make sure that the luma input signal has a
sync tip near ground.
Table 3. Jumper JU3, JU4 Settings
SHUNT POSITION
Installed
Not installed*
*Default position.
MAX11503 INPUT
DC-coupled
AC-coupled
Output Signal
The MAX11503 EV kit can provide a sag-corrected DC-
or AC-coupled composite CVBS or Y (luma) signal. The
default output signal is set as DC-coupled composite
CVBS. To change the output signal to sag-corrected
AC-coupled, remove the R5 and R6 0Ω resistors and
install a 68µF and a 22µF aluminum electrolytic capaci-
tor on the C5 and C6 pads, respectively.
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