MAX9516 Datasheet, PDF (12/15 Pages) Maxim Integrated Products – 1.8V, Ultra-Low-Power, DirectDrive Video Filter Amplifier with Load Detect

1.8V, Ultra-Low-Power, DirectDrive
Video Filter Amplifier with Load Detect
Power-Supply Bypassing
and Ground Management
The MAX9516 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 V_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 MAX9516 was designed to operate from noisy digi-
tal supplies. The high PSRR (54dB at 100kHz) allows
the MAX9516 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 resistance (ESR) and equivalent
series inductance (ESL).
Typical Operating Circuits
VIDEO
ASIC
DAC
VDD
SHDN
MAX9516
LOAD SENSE
LOAD
IN
LPF
TRANSPARENT
CLAMP
DC
LEVEL SHIFT
VIDEO
AMPLIFIER
OUT
75Ω
75Ω
V_DD
1.8V
0.1µF
CHARGE PUMP
LINEAR
REGULATOR
Figure 7. DC-Coupled Input
GND CPGND
C1P C1N V_SS
C2
C1
1µF
1µF
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