SM5320AV 参数 Datasheet PDF下载

SM5320A

5-channel Video Buffer with Built-in wideband LPF

OVERVIEW

The SM5320A is a 5-channel video buffer with built-in 5th-order lowpass filters. The HD block lowpass filter

cutoff frequency range can adjust from 4.10MHz to 42.7MHz

*1

by 256 steps. 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 reduces video DAC aliasing

and external noise and can drive up to 300

Ω

terminating resistance. The cutoff frequency and signal input type

can be controlled using an I

2

C-BUS

*2

, and the I

2

C slave address can be set by ADS (3-state input) to allow up

to three SM5320A on the same bus. The output gain can be varied in the range of 0dB

±

2.1dB (max step:

0.15dB) for each Y/C block and HD block individually using the I

2

C-BUS.

*1. When the resistor connected to ISET (R

ISET

) is 1.8k

Ω

.

*2. I

2

C-BUS is a registered trademark of NXP B.V.

FEATURES

I

PINOUT

(Top view)

CIN

YIN

VCC4

VDD

SDA

SCL

GND6

VCC5

NC

ISET

GND1

IN3

IN2

IN1

I

I

I

I

I

I

I

I

I

I

I

Supply voltages

• Analog: 4.75 to 5.25V

• Digital: 3.0 to 5.5V

Lowpass filter with adjustable cutoff frequency

(256 steps) (CH-1 to CH-3)

• Cutoff frequency range: 4.10MHz to 42.7MHz

(R

ISET

=

1.8k

Ω

)

Filter bypass mode function for display specifica-

tions up to SXGA resolution (CH-1 to CH-3)

• Passband: 80MHz (typ)

Half fc mode switch function suitable for compo-

nent signals (CH-2, CH-3)

Video input pins can be independently set to sync-

tip clamp/bias inputs (CH-1 to CH-3)

Filter passband (

±

1.5dB): 6MHz (CH-Y/C)

Up to 300

Ω

terminating resistance drive capability

Output gain: 0dB

±

2.1dB (max step: 0.15dB)

Power-down function

•

≤

500

µ

A current consumption when power-down

I

2

C-BUS interface control

• Slave address: 48h, 49h, or 4Ah

(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 VSOP

1

28

GND5

COUT

VCC3

YOUT

GND4

VCC2

OUT3

GND3

OUT2

VCC1

OUT1

GND2

REF

14

15

ADS

PACKAGE DIMENSIONS

(Unit: mm)

+

0.15

−

0.1

0.05

5.6 ± 0.2

I

I

I

0.675TYP

9.8 ± 0.2

0 to 10 °

0.10 ± 0.05

Device

SM5320AV

Package

28-pin VSOP

1.15 ± 0.1

ORDERING INFORMATION

0.65

+ 0.1

0.22 - 0.05

0.10

0.12 M

SEIKO NPC CORPORATION —1

0.5 ± 0.2

I

HDTVs

LCD TVs

PDPs

Projectors

7.6 ± 0.2

APPLICATIONS