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TDA4886A Datasheet, PDF (13/52 Pages) NXP Semiconductors – 140 MHz video controller with I2C-bus | |||
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Philips Semiconductors
140 MHz video controller with I2C-bus
Product speciï¬cation
TDA4886A
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Fast blanking (pin 1) and OSD signal insertion (channel 1: pin 2; channel 2: pin 3; channel 3: pin 4); note 13
V1
fast blanking input signal
no video signal blanking,
0
â
1.1 V
OSD signal insertion disabled
video signal blanking,
1.7 â
OSD signal insertion enabled
VP
V
V2,3,4
OSD input signal
V1 > 1.7 V
no internal OSD signal
insertion
0
â
1.1 V
tr(OSD)
internal OSD signal insertion 1.7 â
rise time of OSD colour signals 10 to 90% amplitude;
(pins 22, 19 and 16)
input pulse with 1.2 ns/V
â
â
VP
V
4
ns
tf(OSD)
fall time of OSD colour signals 90 to 10% amplitude;
(pins 22, 19 and 16)
input pulse with 1.2 ns/V
â
â
7
ns
tg(CO)
width of (negative going) OSD identical pulses at fast blanking 0
â
6
ns
signal insertion glitch, leading input (pin 1) and OSD signal
edge (pins 22, 19 and 16)
inputs (pins 2, 3 and 4)
tg(OC)
width of (negative going) OSD identical pulses at fast blanking 0
â
6
ns
signal insertion glitch, trailing input (pin 1) and OSD signal
edge (pins 22, 19 and 16)
inputs (pins 2, 3 and 4)
dVOSD
overshoot/undershoot of OSD pulse with 1.2 ns/V at OSD
â
â
30
%
colour signal related to actual signal inputs (pins 2, 3 and 4)
OSD output pulse amplitude
(pins 22, 19 and 16)
VOSD(max)
maximum OSD colour signal maximum OSD contrast;
related to nominal colour signal maximum gain
(pins 22, 19 and 16)
100 120 140 %
OSD contrast control; see Fig.9 and note 14
dOC
OSD colour signal related to 0FH (maximum)
maximum OSD colour signal 00H (minimum)
â
0
â
dB
â14 â12 â10 dB
Subcontrast adjustment, contrast modulation and beam current limiting (pin 24); see Fig.8 and note 15
V24(nom)
V24(start)
V24(stop)
B24
I24(max)
nominal input voltage
pin 24 open-circuit
4.7 5.0 5.3 V
starting voltage for contrast
and OSD contrast reduction
4.2 4.5 4.8 V
stop voltage for contrast and â32 dB below maximum colour 1.5 2.0 2.5 V
OSD contrast reduction
signal (contrast setting 3FH)
bandwidth of contrast
modulation
â3 dB
4
â
â
MHz
maximum input current
V24 = 0 V
â1.0 â
â
µA
Brightness control; see Fig.10 and notes 16 and 17
âVbl
difference between black level 3FH (maximum)
and reference black level at
10H (nominal)
signal outputs related to
nominal colour signal
00H (minimum)
25
30
35
%
â
0
â
%
â12 â10 â8
%
1998 Dec 04
13
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