MAX9541 데이터 시트보기 (PDF) - Maxim Integrated
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MAX9541 Datasheet PDF : 17 Pages
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MAX9541/MAX9542
Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals
Pin Description
PIN
NAME
1
IN0A
2
IN1A
3
IN2A
4
IN3A
5
IN0B
6
IN1B
7
IN2B
8
IN3B
9
GND
10
SHDN
11
OUT3
12
OUT2
13
OUT1
14
OUT0
15
A/B
16
VDD
FUNCTION
Video Input A Channel 0
Video Input A Channel 1
Video Input A Channel 2
Video Input A Channel 3
Video Input B Channel 0
Video Input B Channel 1
Video Input B Channel 2
Video Input B Channel 3
Ground
Shutdown Logic Input. Connect to GND to place the device in shutdown. Connect to VDD for
normal operation.
Video Output Channel 3
Video Output Channel 2
Video Output Channel 1
Video Output Channel 0
Input Select. Connect to GND to select Video Input A as the video source. Connect to VDD to select
Video Input B as the video source.
Positive Power Supply. Bypass to GND with a 0.1µF capacitor.
Detailed Description
The MAX9541 selects between two standard-definition
video sources that can each have up to four video signals,
for example, RGB with composite sync (RGBS) or RGB
with sync-on-green. See Figure 1. It is also possible to
select between two sets of four composite video signals
with blanking and sync (CVBS). With its integrated low-
pass filter (10MHz large-signal -3dB bandwidth typical),
the MAX9541 can provide the anti-alias filtering before
an analog-to-digital converter (ADC) or the reconstruc-
tion filtering after a digital-to-analog converter (DAC). The
incoming video signals can have any DC bias because
the MAX9541 has input sync-tip clamps which restore
the DC level. The output amplifiers have a gain of 2V/V.
The MAX9541 operates from a single 3.3V supply and
consumes low quiescent power and low average power.
In addition, the device also has shutdown mode.
The MAX9542 is similar to the MAX9541 except that it
does not have the integrated lowpass filter. As a result,
the typical, large-signal bandwidth of the MAX9541 is
15MHz. Therefore, it can select between two video sourc-
es that can each have up to four video signals that are
standard definition or VGA. A standard-definition signal
set would be RGB with composite sync. A VGA signal set
would be RGB with a 640 x 480 resolution and up to 85Hz
refresh rate. See Figure 2.
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