SM5302A

NIPPON PRECISION CIRCUITS INC.—1

3-channel Video Buffer with Built-in wideband LPF

OVERVIEW

The SM5302A is a 3-channel video buffer with built-in 5th-order lowpass filters. The lowpass filter cutoff fre-

format, video signal equipment analog input/outputs. For video input systems, the device functions as a next-

stage ADC system anti-aliasing filter. For video output systems, the filter removes video DAC aliasing and

external noise and can drive a maximum of two 75

Ω terminated loads. The cutoff frequency, signal input type,

ADS (3-state input) to allow a maximum of three devices to be used simultaneously.

FEATURES

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Supply voltages

• Analog: 4.75 to 5.25V

• Digital: 3.0 to 5.5V

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Lowpass filter with linearly adjustable cutoff fre-

quency (256 values)

• Cutoff frequency range: 4.8MHz to 43MHz

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Filter bypass mode function for display specifica-

tions up to SXGA resolution

• Passband: 80MHz (typ)

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Half fc mode switch function (CH-2, CH-3) suit-

able for digital component signals

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2-system input multiplexer function

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Video input pins can be independently set to sync-

tip clamp/bias/direct inputs

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Maximum two 75

Ω terminated load drive capability

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Output gain switching: 0dB/6dB

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Disable function

•

≤ 300µA current consumption when disabled

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Output sag compensation circuit built-in

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• Slave address: 90h, 92h, or 94h (up to three

devices can be used simultaneously, selected by

ADS input)

• Data transfer rate: Fast mode (up to 400kbit/s)

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Operating ambient temperature range: 0 to 70

°C

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Package: 28-pin HSOP

APPLICATIONS

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HDTVs

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LCD TVs

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PDPs

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Projectors

ORDERING INFORMATION

PINOUT

(Top view)

PACKAGE DIMENSIONS

(Unit: mm)

Device

Package

SM5302AS

28-pin HSOP

VCC2

1

GND1

OUT1B

OUT1A

REF3

REF2

REF1

VDD

SDA

MUXSEL

OUT2A

OUT2B

GND2

VCC3

OUT3A

OUT3B

GND3

IN3B

IN2B

IN3A

IN2A

ISET

VSS

ADS

IN1B

IN1A

SCL

VCC1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1.3TYP

0.8

18.6 ± 0.3

5.15

0.35 ± 0.05

0.10

0.12 M

0.15 − 0.05

+ 0.1

0 to 10 °