TDA9181 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TDA9181

Integrated multistandard comb filter

Philips Electronics 

Philips Semiconductors

Integrated multistandard comb filter

Objective specification

TDA9181

FEATURES

• One-chip multistandard adaptive comb filter

• Cross luminance reduction

• Cross colour reduction

• No chroma trap, therefore sharper vertical luminance

transients

• Analog discrete-time signal processing, therefore no

quantization noise

• Anti-aliasing and reconstruction filters are included

• Input switch selects between two Y/CVBS inputs

• Output switch selects between combed CVBS and an

external Y/C source

• fSC as well as 2 × fSC colour subcarrier signal may be

applied

• Alignment free

• Few external components

• Low power.

GENERAL DESCRIPTION

The TDA9181 is a an adaptive PAL/NTSC comb filter with

two internal delay lines, filters, clock control and input

clamps. Video standards PAL B, G, H, D, I, M and N and

NTSC M are supported.

Two CVBS input signals can be selected by means of an

input switch.

The selected CVBS input signal is filtered to obtain

a combed luminance output signal and a combed

chrominance output signal. Switched capacitor circuit

techniques are used, requiring an internal clock, locked on

to the colour subcarrier frequency.

The colour subcarrier frequency as well as twice the colour

subcarrier frequency may be applied to the IC.

In addition to the comb filter the circuit contains an output

switch so that a selection can be made between the

combed CVBS signal and an external Y/C signal.

The IC is available in a DIP16 and SO16 package.

The supply voltage is 5 V.

QUICK REFERENCE DATA

SYMBOL

VCCA

ICCA

VDDD

IDDD

Vi(Y/CVBS)(p-p)

Vi(CIN)(p-p)

Vi(FSC)(p-p)

Vo(Y/CVBS)(p-p)

Vo(CIN)(p-p)

PARAMETER

analog supply voltage

analog supply current

digital supply voltage

digital supply current

luminance or CVBS input signal voltage (peak-to-peak value)

chrominance input signal voltage (peak-to-peak value)

colour subcarrier input signal voltage (peak-to-peak value)

luminance or CVBS output signal voltage (peak-to-peak value)

chrominance output signal voltage (peak-to-peak value)

MIN.

4.5

−

4.5

−

0.7

−

100

0.6

−

TYP.

5.0

25

5.0

10

1.0

0.7

200

1.0

0.7

MAX.

5.5

−

5.5

−

1.4

1.0

400

1.54

1.1

UNIT

V

mA

V

mA

V

V

mV

V

V

ORDERING INFORMATION

TYPE

NUMBER

TDA9181P

TDA9181T

NAME

DIP16

SO16

PACKAGE

DESCRIPTION

plastic dual in-line package; 16 leads (300 mil); long body

plastic small outline package; 16 leads; body width 7.5 mm

VERSION

SOT38-4

SOT162-1

2000 Nov 22

2

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