MAX9508ATE+T Maxim Integrated Products, MAX9508ATE+T Datasheet - Page 18

• Manufacturer Part Number: MAX9508ATE+T
• Description: IC AMP VIDEO FILTER 16-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX9508ATE+T

• Applications: Filter
• Number Of Circuits: 3
• Current - Supply: 13mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX9508 video inputs YIN, CIN, and CVBSIN
should be directly connected to the output of the video
current DAC. DC-coupling ensures that the input sig-
nals are ground referenced such that the sync tip of
composite or luma signals is within 50mV of ground
and the blank level of the chroma signal is between
0.5V and 0.65V. Since the input buffer is identical for
YIN, CIN, and CVBSIN, any standard-definition video
signal can be applied to those inputs as long as the
signal is between ground and 1.05V when V
For example, three composite video signals could be
CVBS/S-Video Filter Amplifier with
SmartSleep and Bidirectional Video Support
Figure 9. Y, P r , P b or RGB Set Applied to MAX9508
18
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VIDEO ENCODER
CURRENT
CURRENT
CURRENT
DAC
DAC
DAC
+3.3V
+3.3V
Pr/R
Pb/B
Y/G
SMARTSLEEP
EXTCVBSIN
INT/EXT
CVBSIN
SHDN
CIN
YIN
CLAMP
DD
BUFFER
BUFFER
ACTIVE VIDEO
Inputs
CONTROL
= 2.7V.
DETECT
BUFFER
LOGIC
LPF
LPF
LPF
MAX9508
applied to YIN, CIN, and CVBSIN. The RGB set and the
YPbPr set can also be inputs to YIN, CIN, and CVBSIN
(Figure 9).
The EXTCVBSIN input can only handle signals with a
sync pulse, such as composite, video, or luma.
Because the DC level of an external video input signal
is unknown, the external video signal is AC-coupled
through a 0.1µF capacitor, and a sync tip clamp sets
the internal DC level of the MAX9508. A 2:1 multiplexer
under the control of the INT/EXT input selects either the
signal at CVBSIN or EXTCVBSIN.
+3.3V
GND
V
DD
0.1μF
6dB
6dB
6dB
6dB
LOAD SENSE
LOAD SENSE
LOAD SENSE
LOAD SENSE
YOUT
CVBSOUT1
CVBSOUT2
COUT
75Ω
75Ω
75Ω
75Ω
Y/G
Pr/R
Pb/B
Y/G