Document
19-3790; Rev 1; 9/05
Single-Channel Video Reconstruction Filters and Buffers
General Description
The MAX7462/MAX7463 single-channel, standard-definition, integrated video reconstruction filters and buffers are ideal for anti-aliasing and digital-to-analog smoothing video applications or wherever analog video is reconstructed from digital data (such as cable/satellite/terrestrial 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 1VP-P signal. 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-coupled or DC-coupled video loads. The output black level of the MAX7462/MAX7463 is less than 1V for DC-coupled outputs.
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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 2VP-P into Two 150Ω Video Loads ♦ Output Black Level < 1V for DC-Coupled Output ♦ Very Small µMAX and SO Packages
MAX7462/MAX7463
Ordering Information
PART MAX7462UUA* MAX7462USA MAX7463USA PINPACKAGE 8 µMAX 8 SO 8 SO BUFFER GAIN (dB) +6/+9.5 selectable +6/+9.5 selectable +6 fixed OUTPUT DISABLE Yes Yes No
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
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
+5V
VCC
MAX7462
75Ω
* 220µF
ZO = 75Ω
0.1µF DAC
IN
LOWPASS FILTER
+6dB/+9.5dB
OUT
75Ω
75Ω
* 220µF
ZO = 75Ω
GND GAIN *OPTIONAL DISABLE
75Ω
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.
Single-Channel Video Reconstruction Filters and Buffers MAX7462/MAX7463
ABSOLUTE MAXIMUM RATINGS
VCC to GND ........................................................................+6.0V All Other Pins to GND ...-0.3V to the lower of (VCC + 0.3V) and +6V Maximum Current into Any Pin Except VCC and GND .....±50mA Continuous Power Dissipation (TA = +70°C) 8-Pin µMAX (derate 4.5mW/°C above +70°C) …...... 362mW 8-Pin SO (derate 5.9mW.