Rainbow Electronics MAX7463 User Manual

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 1V

P-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.

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

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

MAX7462/MAX7463

Single-Channel Video Reconstruction Filters

and Buffers

________________________________________________________________ Maxim Integrated Products 1

19-3790; Rev 0; 8/05

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.

Ordering Information

Note: All parts are specified over the 0°C to +85°C temperature
range.
*Future product—contact factory for availability.

µMax is a registered trademark of Maxim Integrated Products, Inc.

Pin Configurations appear at end of data sheet.

75Ω

75Ω

220µF

220µF

*

*

Z

O

= 75Ω

Z

O

= 75Ω

75Ω

75Ω

OUT

+6dB/+9.5dB

GAIN

DISABLE

GND

LOWPASS

FILTER

V

CC

+5V

DAC

IN

0.1µF

MAX7462

*OPTIONAL

Functional Diagram

PART

MAX7462UUA* 8 µMAX

MAX7462USA* 8 SO

MAX7463USA 8 SO +6 fixed No

PIN­PACKAGE

BUFFER GAIN

(dB)

+6/+9.5

selectable

+6/+9.5

selectable

OUTPUT

DISABLE

Yes

Yes

MAX7462/MAX7463

Single-Channel Video Reconstruction Filters
and Buffers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VCCto GND ........................................................................+6.0V

All Other Pins to GND ...-0.3V to the lower of (V

CC

+ 0.3V) and +6V

Maximum Current into Any Pin Except V

CC

and GND .....±50mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin µMAX (derate 4.5mW/°C above +70°C) …...... 362mW

8-Pin SO (derate 5.9mW/°C above +70°C) .......... 470.6mW

Operating Temperature Range...............................0°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

ELECTRICAL CHARACTERISTICS

(VCC= +5V ±5%, CL= 0 to 20pF, RL= 75Ω, CIN= 0.1µF, gain = +6dB, DISABLE = VCC(MAX7462), TA=T

MIN

to T

MAX

, unless other-

wise noted. Typical values are at V

CC

= +5V, and TA= +25°C.)

Note 1: Measured after 75Ω back-match resistor. Assume a 75Ω termination resistor.

Passband Response f = 100kHz to 5MHz, relative to 100kHz -0.65 -0.05 +0.65 dB

Stopband Attenuation f ≥ 27MHz 39 43 dB

Output Dynamic Swing Gain = GND (MAX7462) 2.0 2.4 V

Output Sync Tip Clamp Level After termination (Note 1) 0.30 0.45 0.55 V

Group Delay Deviation f = 100kHz to 4.2MHz 11 ns

Differential Gain Five-step modulated staircase 0.15 %

Differential Phase Five-step modulated staircase 0.15 Degrees

Signal-to-Noise Ratio Output signal (2V

Low-Frequency Gain Accuracy f =100kHz, relative to a gain of +6dB -3 +3 %

Line Time Distortion 18µs, 100 IRE bar 0.1 %

Field Time Distortion 130 lines, 18µs, 100 IRE bar 0.1 %

Power-Supply Rejection Ratio VIN = 100mV

Supply Current No load 25 35 mA

PARAMETER CONDITIONS MIN TYP MAX UNITS

P-P

, f = 100kHz 35 dB

P-P

) to RMS noise (100Hz to 5MHz) 75 dB

P-P

MAX7462/MAX7463

Single-Channel Video Reconstruction Filters

and Buffers

_______________________________________________________________________________________ 3

Typical Operating Characteristics

(VCC= +5V ±5%, CL= 0 to 20pF, RL= 75Ω, CIN= 0.1µF, gain = +6dB, DISABLE = VCC(MAX7462), TA=T

MIN

to T

MAX

, unless other-

wise noted. Typical values are at V

CC

= +5V, and TA= +25°C.)

0

-20

-40

AMPLITUDE (dB)

-60

NORMALIZED TO 0dB

-80

0.1 100

200

150

100

50

0

-50

PHASE (DEGREES)

-100

-150

-200

0.1 10

AMPLITUDE vs. FREQUENCY

101

FREQUENCY (MHz)

PHASE RESPONSE

vs. FREQUENCY

1

FREQUENCY (MHz)

MAX7462/63 toc01

MAX7462/63 toc03

PASSBAND AMPLITUDE

vs. FREQUENCY

2.0

1.5

1.0

0.5

0

-0.5

AMPLITUDE (dB)

-1.0

-1.5
NORMALIZED TO 0dB

-2.0

0.1 10

1

FREQUENCY (MHz)

GROUP DELAY vs. FREQUENCY

100

90

80

70

GROUP DELAY (ns)

60

50

0.1 10

1

FREQUENCY (MHz)

MAX7462/63 toc02

MAX7462/63 toc04

2T RESPONSE

200ns/div

MAX7462/63 toc05

OUT
250mV/div

IN
250mV/div

MODULATED 12.5T RESPONSE

200ns/div

MAX7462/63 toc06

OUT
250mV/div

IN
250mV/div