TDA4885 查看數據表（PDF） - Philips Electronics
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TDA4885 Datasheet PDF : 56 Pages
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Philips Semiconductors
150 MHz video controller with I2C-bus
Product specification
TDA4885
SYMBOL
PARAMETER
CONDITIONS
MIN.
Limiting (pin 17); see Fig.9 and note 17
V17(nom)
input voltage
pin 17 open-circuit
4.7
V17(start)
starting voltage for contrast
4.2
and OSD contrast reduction
V17(stop)
stop voltage for contrast and
OSD contrast reduction
−32 dB below maximum colour 1.5
signal (contrast setting 3FH)
I17
maximum input current
V17 = 0 V
−1.0
Brightness control; see Fig.12 and notes 18 and 19
∆Vbl
difference between black level 3FH (maximum)
+25
and reference black level at 10H (nominal)
−2
signal outputs related to
nominal colour signal
00H (minimum)
−12
∆VBT
difference of ∆Vbl between any
−1.2
two channels related to
nominal colour signal
Brightness blanking
td11(br)l
delay between blanking input see Fig.8
−
at pin 11 (leading edge) and
brightness blanking at signal
outputs
td11(br)t
delay between blanking input see Fig.8
−
at pin 11 (trailing edge) and
brightness blanking at signal
outputs
Gain control; see Fig.13 and note 20
dG
video signal related to video 00H (minimum)
−8
signal at maximum gain
3FH (maximum)
−
Gain modulation (channel 1: pin 12; channel 2: pin 13; channel 3: pin 14)
V12, 13, 14
input voltage
symmetrical modulation
1.0
modulation feature not in use −
nominal: pins 12, 13 and 14 1.8
open-circuit
Gmod1, 2, 3
gain modulation channels 1, 2
and 3
note 21; see Fig.14
pins 12, 13 and 14 grounded 112
(modulation feature not in
use)
V12, 13, 14 = 1 V (maximum) 112
V12, 13, 14 = 2 V
−
V12, 13, 14 = 3 V (minimum) 76
TYP. MAX.
5.0 5.3
4.5 4.8
2.0 2.5
−0.5 −0.1
+30 +35
0 +2
−10 −8
0 +1.2
−
60
−
60
−7 −6
0
−
−
3.0
−
0
2.0 2.2
120 130
118 124
100 −
82 88
UNIT
V
V
V
µA
%
%
%
%
ns
ns
dB
dB
V
V
V
%
%
%
%
1997 Nov 25
14
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