MAX9507
Power-Supply Bypassing and
Ground Management
The MAX9507 operates from a 1.7V to 2.625V single
supply and requires proper layout and bypassing. For
the best performance, place the components as close
to the device as possible.
Proper grounding improves performance and prevents
any switching noise from coupling into the video signal.
Bypass the analog supply (V
DD
) with a 0.1µF capacitor
to GND, placed as close to the device as possible.
Bypass CPV
SS
with a 1µF capacitor to GND as close to
the device as possible. The total system bypass capac-
itance on V
DD
should be at least 10µF, or ten times the
capacitance between C1P and C1N.
Using a Digital Supply
The MAX9507 is designed to operate from noisy digital
supplies. The high power-supply rejection ratio (47dB
at 100kHz) allows the MAX9507 to reject the noise from
the digital power supplies (see the
Typical Operating
Characteristics
). If the digital power supply is very
noisy and stripes appear on the television screen,
increase the supply bypass capacitance. An additional,
smaller capacitor in parallel with the main bypass
capacitor can reduce digital supply noise because the
smaller capacitor has lower equivalent series resis-
tance (ESR) and equivalent series inductance (ESL).
1.8V DirectDrive Video Filter Amplifier with
Load Detection and Dual SPST Analog Switches
26 ______________________________________________________________________________________
Chip Information
PROCESS: BiCMOS
Pin Configuration
*EXPOSED PAD CONNECTED TO GND.
