TDA4672 datasheet(2/16 Pages) PHILIPS

2 / 16 page

1996 Dec 11

Philips Semiconductors

Product speciﬁcation

Picture Signal Improvement (PSI) circuit

with enhanced peaking function

TDA4672

FEATURES

• Luminance signal delay from 20 ns to 1100 ns

(minimum step 45 ns)

• Selectable luminance signal peaking with symmetrical

overshoots

• Selectable 2.6 or 5 MHz peaking centre frequency and

degree of peaking from

−6 dB to +9 dB in 16 steps of

1 dB each

• Selectable noise reduction by coring

• Selectable 5 or 12 V sandcastle input voltage

• All controls selected via the I2C-bus

• Timing pulse generation for clamping and delay time

control synchronized by sandcastle pulse

• Automatic luminance signal delay correction using a

control loop

• Luminance input signal clamping with coupling capacitor

• 4.5 to +8.8 V supply voltage

• Minimum of external components.

GENERAL DESCRIPTION

The TDA4672 delays the luminance signal. The luminance

signal can also be improved by peaking and noise

reduction (coring).

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

supply voltage (pin 1)

4.5

8.8

IP(tot)

total supply current

td(Y)

Y signal delay time

−

1130

Vi(Y)(p-p)

composite Y input signal (peak-to-peak value, pin 16)

−

450

640

voltage gain of Y channel

−−1

−

Tamb

operating ambient temperature

−

°C

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA4672

DIP18

plastic dual in-line package; 18 leads (300 mil)

SOT102-1

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