MAX7462 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Single-Channel Video Reconstruction Filters and Buffers

19-3790; Rev 1; 9/05
Single-Channel Video Reconstruction Filters
and Buffers
General Description
The MAX7462/MAX7463 single-channel, standard-defini-
tion, integrated video reconstruction filters and buffers
are ideal for anti-aliasing and digital-to-analog smoothing
video applications or wherever analog video is recon-
structed from digital data (such as cable/satellite/terres-
trial set-top boxes and DVRs).
The MAX7462 includes a disable function, which
places the output in a high-impedance state allowing
multiplexing of multiple output signals. It also has an
external gain control that sets the output buffer gain to
either +6dB or +9.5dB. The higher gain setting allows a
lower DAC output signal than the standard 1V_P-P sig-
nal. The MAX7463 output buffer has a fixed gain of
+6dB.
The MAX7462/MAX7463 operate from a single +5V
supply and have a flat passband out to 5MHz with a
stopband attenuation of -43dB (typ) at 27MHz.
These devices can drive two standard 150Ω AC-cou-
pled or DC-coupled video loads. The output black level
of the MAX7462/MAX7463 is less than 1V for DC-cou-
pled outputs.
The MAX7462 is available in an 8-pin µMAX^® package
and an 8-pin SO package. The MAX7463 is available in
an 8-pin SO package. All devices are specified over
the 0°C to +85°C temperature range.
Applications
Cable/Satellite/Terrestrial Set-Top Boxes
DVRs
Hard-Disk Recorders
+5V
Features
♦ Standard-Definition CVBS Video Reconstruction
Filters and Buffers
♦ Passband: -0.05dB at 5MHz
♦ Stopband: -43dB at 27MHz
♦ Selectable Gain: +6dB and +9.5dB (MAX7462)
♦ Output Disable (MAX7462)
♦ Drives 2V_P-P into Two 150Ω Video Loads
♦ Output Black Level < 1V for DC-Coupled Output
♦ Very Small µMAX and SO Packages
Ordering Information
PART
PIN-
BUFFER GAIN OUTPUT
PACKAGE
(dB)
DISABLE
MAX7462UUA* 8 µMAX
+6/+9.5
selectable
Yes
MAX7462USA 8 SO
+6/+9.5
selectable
Yes
MAX7463USA 8 SO
+6 fixed
No
Note: All parts are specified over the 0°C to +85°C temperature
range.
*Future product—contact factory for availability.
Pin Configurations appear at end of data sheet.
Functional Diagram
V_CC
0.1µF
DAC
IN
LOWPASS
FILTER
MAX7462
OUT
+6dB/+9.5dB
75Ω
*
Z_O = 75Ω
220µF
75Ω
*OPTIONAL
75Ω
*
Z_O = 75Ω
220µF
GND
75Ω
GAIN DISABLE
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
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.