TDA4887PS datasheet(16/68 Pages) PHILIPS

16 / 68 page

2001 Oct 19

Philips Semiconductors

Product speciﬁcation

160 MHz bus-controlled monitor video

preampliﬁer

TDA4887PS

OSD contrast control; see Fig.9 and note 14

δOC

OSD colour signal related to

maximum OSD colour signal

0FH (maximum)

−

00H (minimum)

−14

−12

−10

Subcontrast adjustment, contrast modulation and beam current limiting (pin 24); see Fig.8 and note 15

VLIM(nom)

nominal input voltage

pin 24 open-circuit

4.7

5.0

5.3

VLIM(start)

starting voltage for linear

contrast and OSD contrast

reduction

4.2

4.4

4.8

VLIM(stop)

stop voltage for linear

contrast and OSD contrast

reduction

−40 dB below maximum

colour signal (contrast

setting FFH)

1.5

2.0

2.5

BLIM

bandwidth of contrast

modulation

−3dB

−−

MHz

ILIM(max)

maximum input current

VLIM =0V

−1

−

µA

Brightness control; see Figs 10, 12 and 14 and notes 16 and 17

∆V

bl(n)

difference between video

black level and reference

black level at signal outputs

related to maximum colour

signal

FFH (maximum); BRI = 0

40H (nominal); BRI = 0

−2

00H (minimum); BRI = 0

−12

−10

−8%

∆V

DA(n)

DAC output voltage shift

(pins 23, 20 and 17)

FPOL = 1, see DAC output

voltages for AC coupling or

feedback reference voltage

shift; FPOL = 0, see internal

feedback reference voltage

for DC coupling

FFH (maximum); BRI = 1

−−1.4

−

00H (minimum); BRI = 1

−

Gain control; see Fig.11 and note 18

video signal related to video

signal at maximum gain

FFH (maximum)

−

00H (minimum)

−15

−13.5 −12.5

Pedestal blanking; see Fig.5 and note 19

∆V

bl(n)(PED-VID)

difference between pedestal

black level and video black

level at nominal brightness,

measured at signal outputs

(pins 22, 19 and 16) related

to maximum colour signal

03H (maximum)

−12

−13.5 −

02H

−8

−9

−

01H

−4

−4.5

−

00H (minimum)

−

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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