TDA4672 datasheet(7/16 Pages) PHILIPS

部件名	TDA4672

功能描述	Picture Signal Improvement PSI circuit with enhanced peaking function

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制造商	PHILIPS [NXP Semiconductors]

网页	http://www.nxp.com

标志

7 / 16 page

1996 Dec 11

7

Philips Semiconductors

Product speciﬁcation

Picture Signal Improvement (PSI) circuit

with enhanced peaking function

TDA4672

∆td(Y)

minimum delay step

set via I2C-bus

40

45

50

ns

group delay time difference

f = 0.5 to 5 MHz;

maximum delay

−

0

±25

ns

td(peak)

minimum delay time for peaking

185

215

245

ns

GY

VBS signal gain measured on

output pin 12 (composite signal,

peak-to-peak value)

V12/V16; f = 500 kHz;

maximum delay

−2

−10

dB

I12

output current (emitter-follower

with constant current source)

source current

−1

−−

mA

sink current

0.4

−−

mA

R12

output resistance

−−

160

Ω

f

frequency response for

maximum delay

f = 0.5 to 3 MHz

−2

−10

dB

f = 0.5 to 5 MHz

−4

−3

−1dB

LIN

signal linearity for

αmin/αmax; note 1

video contents of 315 mV (p-p)

VVBS = 450 mV (p-p)

0.85

−−−

video contents of 450 mV (p-p)

VVBS = 640 mV (p-p)

0.60

−−−

Luminance peaking, selected via I2C-bus

fpeak

peaking frequency

fC1; LCF-bit = 0

4.5

5

5.5

MHz

fC2; LCF-bit = 1

2.3

2.6

2.9

MHz

Vpeak

peaking amplitude for grade of

peaking (fC amplitude over

0.5 MHz amplitude)

Y delay = 215 ns;

peaking delay only

selectable values

from

−−6

−

dB

to

−

+9

−

dB

each step

−

1

−

dB

no limitation of peaking

−−−

%

Vn(rms)

noise voltage on pin 12

(RMS value)

without peaking;

f=0to5MHz

−−

1mV

COR

coring of peaking

(coring part referred to 315 mV)

COR-bit = 1

−

20

−

%

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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