max9513atet Maxim Integrated Products, Inc., max9513atet Datasheet - Page 11

• Manufacturer Part Number: max9513atet
• Description: Max9513 Cvbs Video Filter Amplifier With Smartsleep And Bidirectional Video Support
• Manufacturer: Maxim Integrated Products, Inc.

In standby mode, the filter and output amplifiers are off,
and only the active video detect circuit is operational.
Quiescent current consumption is approximately 7µA
(Figure 2). The active video detect circuit checks
whether sync is present on the CVBSIN signal. If no
sync is detected, the device remains in standby mode.
The active video detect circuit slices the CVBSIN signal
at 4.7% of the power supply (155mV for a 3.3V supply).
If the transitions occur at a rate of 14.3kHz or higher, a
Figure 2. Standby Mode
CURRENT
DAC
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
CVBS Video Filter Amplifier with SmartSleep
+3.3V
+3.3V
NO VIDEO
SIGNAL
SMARTSLEEP
EXTCVBSIN
INT/EXT
CVBSIN
SHDN
Active-Detect Mode
Standby Mode
CLAMP
OFF
and Bidirectional Video Support
ACTIVE VIDEO
CONTROL
DETECT
LOGIC
BUFFER
OFF
7µA
LPF
OFF
video signal is present. When the MAX9513 detects a
video signal with sync at the CVBSIN input, the control
logic enters the active-detect mode and enables the
load-sense circuitry (Figure 3). The supply current is
typically 17µA.
If an output load is not connected to any amplifier, the
MAX9513 remains in active-detect mode. Eight times per
second, each load-sense circuit checks for a load by
connecting an internal 15kΩ pullup resistor to the output
for 1ms. If the output is pulled up, no load is present. If
the output stays low, a load is connected.
+3.3V
GND
V
DD
MAX9513
6dB
6dB
OFF
OFF
LOAD SENSE
LOAD SENSE
OFF
OFF
CVBSOUT1
CVBSOUT2
75Ω
75Ω
CVBS1
CVBS2
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