TDA4886A 查看數據表（PDF） - Philips Electronics
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TDA4886A Datasheet PDF : 52 Pages
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Philips Semiconductors
140 MHz video controller with I2C-bus
Product specification
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
−
1.1 V
OSD signal insertion disabled
video signal blanking,
1.7 −
OSD signal insertion enabled
VP
V
V2,3,4
OSD input signal
V1 > 1.7 V
no internal OSD signal
insertion
0
−
1.1 V
tr(OSD)
internal OSD signal insertion 1.7 −
rise time of OSD colour signals 10 to 90% amplitude;
(pins 22, 19 and 16)
input pulse with 1.2 ns/V
−
−
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
−
−
7
ns
tg(CO)
width of (negative going) OSD identical pulses at fast blanking 0
−
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
−
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
−
−
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)
−
0
−
dB
−14 −12 −10 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 −32 dB below maximum colour 1.5 2.0 2.5 V
OSD contrast reduction
signal (contrast setting 3FH)
bandwidth of contrast
modulation
−3 dB
4
−
−
MHz
maximum input current
V24 = 0 V
−1.0 −
−
µA
Brightness control; see Fig.10 and notes 16 and 17
∆Vbl
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
%
−
0
−
%
−12 −10 −8
%
1998 Dec 04
13
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