TDA4884 datasheet(8/28 Pages) PHILIPS

8 / 28 page

1997 Nov 26

Philips Semiconductors

Product speciﬁcation

Three gain control video pre-ampliﬁer for OSD

TDA4884

10 CHARACTERISTICS

VP = 8.0 V; Tamb =25 °C; all voltages measured with respect to GND (pin 4); unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage (pin 7)

7.2

8.0

8.8

supply current (pin 7)

Video signal inputs (pins 2, 5 and 8)

Vi(b-w)

input voltage (black-to-white

value; pins 2, 5 and 8)

−

0.7

1.0

VI(clamp)

DC voltage during input clamping

(artiﬁcial black + VBE)

note 1

2.8

3.1

3.4

DC input current

no clamping; VI =VI(clamp);

Tamb = −20 to +70 °C

−0.05

+0.05

+0.250

µA

during clamping;

VI =VI(clamp) + 0.7 V

120

µA

during clamping;

VI =VI(clamp) − 0.7 V

−50

−75

−120

µA

Contrast control (pin 6); note 2

Vi(CC)

input voltage

1.0

−

6.0

Vi(CC)(max)

maximum input voltage

−−

VP − 1V

Vi(CC)(nom)

input voltage for nominal contrast

note 3

−

4.3

−

Ii(CC)

input current

Vi(CC) = 4.3 V

−5

−1

−0.1

µA

COSD(min)

minimum contrast for OSD

Vi(CC) = 0.7 V

−−40

−

contrast relative to nominal

contrast

Vi(CC) = 6.0 V; pins 3, 1 and

11 open-circuit

2.4

3.4

−

Vi(CC) = 1.0 V; pins 3, 1 and

11 open-circuit

−26

−22

−19

Vi(CC)(min)

input voltage for minimum contrast

pins 3, 1 and 11 open-circuit

−

0.7

−

∆Gtrack

tracking of output signals of

channels 1, 2 and 3

1V<Vi(CC) < 6 V; note 4

−

0.5

tdf(C)

delay between leading (falling)

edges of contrast voltage and

voltage output waveforms

Vi(CC) = 4.3 V to 0.7 V; input

fall time at pin 6:

tf(CC) = 2 ns; note 5; Fig.7

−

720

tdr(C)

delay between trailing edges

(rising) of contrast voltage and

voltage output waveforms

Vi(CC) = 0.7 V to 4.3 V; input

rise time at pin 6:

tr(CC) = 2 ns; note 5; Fig.7

−

tf(C)

fall time of voltage output

waveform

90% to 10% amplitude;

input fall time at pin 6:

tf(CC) = 2 ns; note 5; Fig.7

−

615

tr(C)

rise time of voltage output

waveform

10% to 90% amplitude;

input rise time at pin 6:

tr(CC) = 2 ns; note 5; Fig.7

−

615

nom

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