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TDA4884

Three gain control video pre-amplifier for OSD

Philips Electronics 

Philips Semiconductors

Three gain control video pre-amplifier for OSD

Product specification

TDA4884

SYMBOL

PARAMETER

Gain control (pins 3, 1 and 11); note 6

Vi(GC)

Vi(GC)(nom)

Ri(GC)

∆G

input voltage

input voltage for nominal gain

input resistance

gain control difference relative to

nominal gain

Feedback input (pins 18, 15 and 12); note 7

Vref(int)

IO(FB)(max)

internal reference voltage

maximum output current

∆Vbl(CRT)

∆Vref(T)

∆Vref(VP)

black-level variation at CRT

variation of Vref(int) in the

temperature range

variation of Vref(int) with supply

voltage

Voltage outputs (pins 19, 16 and 13); note 1

Vo(b-w)(nom)

nominal signal output voltage

(black-to-white value)

Vblx(max)

Vbl(SO)

Vbl(TST)

maximum adjustable black-level

voltage

black-level voltage during

switch-off, equal to minimum

adjustable black-level voltage

black-level voltage during test

mode

Gnom

B

S/N

dO(th)

∆Vbl(fl)

Voffset(max)

∆Vo(b-w)(T)

nominal gain (pins 2, 5 and 8 to

pins 19, 16 and 13)

bandwidth

signal-to-noise ratio

output thermal distortion

black-level variation between

clamping pulses

maximum offset during sync

clipping

variation of nominal output signal

(black-to-white value) with

temperature

CONDITIONS

MIN. TYP. MAX. UNIT

1.0

−

6.0

V

pins 3, 1 and 11 open-circuit 3.6

3.75 3.95 V

44

55

66

kΩ

Vi(CC) = 4.3 V; Vi(GC) = 6 V 2

2.6

Vi(CC) = 4.3 V; Vi(GC) = 1 V −5.5 −5

3.3

dB

−4.5 dB

during output clamping;

Vi(FB) = 3 V

note 8

Tamb = −20 to +70 °C

7.2 V ≤ VP ≤ 8.8 V

5.6

5.8

6.1

V

−500 −100 −60 nA

0

40

200 mV

0

20

50

mV

0

60

100 mV

pins 3, 1 and 11

0.69 0.79 0.89 V

open-circuit; Vi(CC) = 4.3 V;

Vi(b-w) = 0.7 V

during output clamping;

1

1.2

1.4

V

Tamb = −20 to +70 °C

Vi(HBL) = VP; RO = 33 Ω;

30

45

100 mV

Tamb = −20 to +70 °C

Vi(HBL) = VP; Vi(CL) = VP;

0.3

0.7

1.2

V

pin 1 open-circuit;

Vi = VI(clamp); note 9

nominal contrast; pins 3, 1 −

1

−

dB

and 11 open-circuit

−3 dB

70

85

−

MHz

note 10

−

50

44

dB

Io(b-w) = 50 mA; note 11

−

0.6

1

%

line frequency = 30 kHz

−

0.5

4.5

mV

Vi < VI(clamp); note 12

0

7

15

mV

pins 3, 1 and 11

0

open-circuit; Vi(CC) = 4.3 V;

Vi(b-w) = 0.7 V;

Tamb = −20 to +70 °C

2.5

10

%

1997 Nov 26

9

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