SM5302AS 参数 Datasheet PDF下载

SM5302A

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-

quency range can be linearly controlled from 4.8MHz to 43MHz

*1

. The lowpass filter supports 480i to 1080i

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,

and output gain switching can be controlled using an I

2

C

*2

control bus, and the I

2

C slave address can be set by

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

*1. When the resistor connected to ISET (R

ISET

) is 1.8k

Ω

.

*2. I

2

C BUS is a registered trademark of Philips Electronics N.V.

FEATURES

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PINOUT

(Top view)

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Supply voltages

• Analog: 4.75 to 5.25V

• Digital: 3.0 to 5.5V

Lowpass filter with linearly adjustable cutoff fre-

quency (256 values)

• Cutoff frequency range: 4.8MHz to 43MHz

(R

ISET

=

1.8k

Ω

)

Filter bypass mode function for display specifica-

tions up to SXGA resolution

• Passband: 80MHz (typ)

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

able for digital component signals

2-system input multiplexer function

(switchable using I

2

C or MUXSEL input)

Video input pins can be independently set to sync-

tip clamp/bias/direct inputs

Maximum two 75

Ω

terminated load drive capability

Output gain switching: 0dB/6dB

Disable function

•

≤

300

µ

A current consumption when disabled

Output sag compensation circuit built-in

I

2

C interface control

• 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)

Operating ambient temperature range: 0 to 70

°

C

Package: 28-pin HSOP

REF1

1

VDD

2

SDA

3

SCL

4

VSS

5

MUXSEL

6

ADS

7

28

REF2

27

REF3

26

VCC1

25

OUT1A

24

OUT1B

23

GND1

22

VCC2

IN1A

8

IN1B

9

ISET

10

IN2A

11

IN2B

12

IN3A

13

IN3B

14

21

OUT2A

20

OUT2B

19

GND2

18

VCC3

17

OUT3A

16

OUT3B

15

GND3

PACKAGE DIMENSIONS

(Unit: mm)

+ 0.

0.15

−

0. 1

05

7.5 ± 0.2

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HDTVs

LCD TVs

PDPs

Projectors

1.3TYP

18.6 ± 0.3

2.2 ± 0.1

0 to 10 °

5.15

0.10

0.35 ± 0.05

0.12 M

Device

SM5302AS

Package

28-pin HSOP

NIPPON PRECISION CIRCUITS INC.—1

0.1 ± 0.05

ORDERING INFORMATION

0.8

0.5 ± 0.2

APPLICATIONS

9.9 ± 0.3