max9508atet Maxim Integrated Products, Inc., max9508atet Datasheet - Page 11

• Manufacturer Part Number: max9508atet
• Description: Max9508 Video Filter Amplifier With Smartsleep And Bidirectional Video Support
• Manufacturer: Maxim Integrated Products, Inc.

outputs. If the SmartSleep feature is not activated and
the part is not in shutdown, the filters and output ampli-
fiers completely turn on, regardless of whether there is
a video signal at the CVBSIN input and whether there
are loads connected at the outputs.
SmartSleep only works with DC-coupled loads.
Figure
2. Standby Mode
VIDEO ENCODER
CURRENT
CURRENT
CURRENT
DAC
DAC
DAC
NO VIDEO
SIGNAL
______________________________________________________________________________________
SmartSleep and Bidirectional Video Support
+3.3V
+3.3V
SMARTSLEEP
EXTCVBSIN
INT/EXT
CVBSIN
SHDN
CIN
YIN
CVBS/S-Video Filter Amplifier with
CLAMP
OFF
BUFFER
BUFFER
ACTIVE VIDEO
OFF
OFF
CONTROL
DETECT
LOGIC
BUFFER
OFF
7μA
LPF
LPF
LPF
OFF
OFF
OFF
In standby mode, the filters and output amplifiers are
off and only the active video detect circuit is opera-
tional. Quiescent current consumption is approximately
7µA
sync is present on the CVBSIN signal. If no sync is
detected the device remains in standby mode.
MAX9508
+3.3V
GND
V
(Figure
DD
6dB
6dB
6dB
6dB
2). The active video detect circuit checks if
OFF
OFF
OFF
OFF
LOAD SENSE
LOAD SENSE
LOAD SENSE
LOAD SENSE
OFF
OFF
OFF
OFF
YOUT
CVBSOUT1
CVBSOUT2
COUT
75Ω
75Ω
75Ω
75Ω
Standby Mode
SVIDEO
CHROMA
SVIDEO
LUMA
CVBS 1
CVBS 2
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