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MAX7481 Datasheet(Hoja de datos) 1 Page - Maxim Integrated Products

No. de Pieza. MAX7481
Descripción  Bidirectional Video Filters/Buffers for Composite and S-Video Portable Media Devices
Descarga  13 Pages
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Fabricante  MAXIM [Maxim Integrated Products]
Página de inicio  http://www.maxim-ic.com
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General Description
The MAX7481/MAX7482 bidirectional video filters/
buffers provide the reconstruction filter and line drive
buffer for both composite (CVBS) and S-Video (Y/C)
video signals in playback mode, and anti-aliasing in
record mode for portable media devices. Each channel
consists of a lowpass filter and an output buffer capa-
ble of driving a full 2VP-P video signal into one standard
150
Ω load (DC-coupled to ground). In record mode,
the MAX7481/MAX7482 output buffers have a gain of
+6dB. In playback mode, the MAX7481 output buffers
have a gain of +6dB and the MAX7482 output buffers
have a gain of +7dB.
The MAX7481/MAX7482 feature DirectDrive™ by utilizing
an internal negative charge pump and regulator to main-
tain the output blanking level at ground, eliminating the
need for a negative supply voltage, a large output cou-
pling capacitor, or a sag correction configuration.
The MAX7481/MAX7482 operate from a single +2.7V to
+3.6V power supply. These devices are available in a
space-saving 28-pin TQFN package and operate over
the -40°C to +85°C extended temperature range.
Applications
Portable Media Devices
Digital Camcorders
Digital Cameras
Features
♦ Composite and S-Video, Video-Playback and Video-
Record Interface for Portable Video Devices
♦ Saves Space by Sharing Connectors in Portable
Devices
♦ DirectDrive
Eliminates Expensive AC-Coupling Capacitors
Blanking Level at Ground with Single Supply
♦ Composite and Y/C Signals
♦ Advanced Power-Down Modes for Extended
Battery Life
♦ Low Supply Current in Shutdown Mode, < 1µA (typ)
♦ Filter Response Ideal for NTSC and PAL
♦ +6dB (MAX7481) or +7dB (MAX7482) Gain
♦ +2.7V to +3.6V Single-Supply Operation
♦ Small, 28-Pin, TQFN Package (5mm x 5mm)
Bidirectional Video Filters/Buffers for Composite
and S-Video Portable Media Devices
________________________________________________________________
Maxim Integrated Products
1
19-0671; Rev 0; 11/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Simplified Block Diagram
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX7481ETI+
-40°C to +85°C
28 TQFN-EP*
T2855-6
MAX7482ETI+
-40°C to +85°C
28 TQFN-EP*
T2855-6
CVBSON
YCON
P/R
LPF
LPF
VIDEO
ADC
VIDEO
DAC
VIDEO
ADC
CONTROL
LOGIC
VIDEO
DAC
VIDEO
PROCESSOR
IN1
IN2
IN3
IN4
IN5
OUT1
OUT2
OUT3
OUT5
OUT4
0V
0V
0V
0V
MAX7481
MAX7482
RECORD SIGNAL FLOW
PLAYBACK SIGNAL FLOW
+
Denotes lead-free package.
*
EP = Exposed pad.
Pin Configuration appears at end of data sheet.




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