TDA4681 Datasheet, PDF (19/28 Pages) NXP Semiconductors – Video processor with automatic cut-off and white level control

Philips Semiconductors
Video processor with automatic cut-off
and white level control
handbook, full pagewidth
(1)
white measurement level
for green signal
(2)
cut-off measurement level
for green signal
ultra-black level
(1) Maximum brightness.
(2) Nominal brightness.
Fig.7 Cut-off and white level measurement pulses.
Product specification
TDA4681
MED701
621 622 623 624 625 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
PAL,
SECAM
NTSC,
PAL M
PAL,
SECAM
(with
increased
vertical
blanking
interval)
vertical flyback 850 µs
V component of the sandcastle pulse
LM
(leakage current measurement time)
vertical blanking interval, 22 complete lines
V component of the sandcastle pulse
MR MG MB WR
WG
WB
LM
vertical blanking interval, 19 complete lines
V component of the sandcastle pulse
MR MG MB WR
WG
WB
cut-off and
white level
measurement
pulses
LM
vertical blanking interval, 25 complete lines
MR MG MB WR
WG
WB
Fig.8 Leakage current, cut-off and white level current measurement timing diagram.
MED702
1997 Mar 04
19