TDA4884 查看數據表（PDF） - Philips Electronics
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TDA4884 Datasheet PDF : 28 Pages
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Philips Semiconductors
Three gain control video pre-amplifier for OSD
Product specification
TDA4884
10 CHARACTERISTICS
VP = 8.0 V; Tamb = 25 °C; all voltages measured with respect to GND (pin 4); unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
VP
supply voltage (pin 7)
IP
supply current (pin 7)
Video signal inputs (pins 2, 5 and 8)
7.2
8.0
8.8
V
36
48
60
mA
Vi(b-w)
VI(clamp)
II
input voltage (black-to-white
value; pins 2, 5 and 8)
DC voltage during input clamping
(artificial black + VBE)
DC input current
Contrast control (pin 6); note 2
note 1
no clamping; VI = VI(clamp);
Tamb = −20 to +70 °C
during clamping;
VI = VI(clamp) + 0.7 V
during clamping;
VI = VI(clamp) − 0.7 V
−
2.8
−0.05
50
−50
0.7
3.1
+0.05
75
−75
1.0
V
3.4
V
+0.250 µA
120 µA
−120 µA
Vi(CC)
Vi(CC)(max)
Vi(CC)(nom)
input voltage
maximum input voltage
input voltage for nominal contrast
note 3
1.0
−
6.0
V
−
−
VP − 1 V
−
4.3
−
V
Ii(CC)
COSD(min)
-C----Cn---o--m--
input current
minimum contrast for OSD
contrast relative to nominal
contrast
Vi(CC) = 4.3 V
−5
Vi(CC) = 0.7 V
−
Vi(CC) = 6.0 V; pins 3, 1 and 2.4
11 open-circuit
−1
−0.1 µA
−40 −
dB
3.4
−
dB
Vi(CC) = 1.0 V; pins 3, 1 and −26 −22 −19 dB
11 open-circuit
Vi(CC)(min)
input voltage for minimum contrast pins 3, 1 and 11 open-circuit −
0.7
−
V
∆Gtrack
tracking of output signals of
channels 1, 2 and 3
1 V < Vi(CC) < 6 V; note 4 −
0
0.5
dB
tdf(C)
tdr(C)
tf(C)
delay between leading (falling)
edges of contrast voltage and
voltage output waveforms
delay between trailing edges
(rising) of contrast voltage and
voltage output waveforms
fall time of voltage output
waveform
Vi(CC) = 4.3 V to 0.7 V; input −
fall time at pin 6:
tf(CC) = 2 ns; note 5; Fig.7
Vi(CC) = 0.7 V to 4.3 V; input −
rise time at pin 6:
tr(CC) = 2 ns; note 5; Fig.7
90% to 10% amplitude;
−
input fall time at pin 6:
tf(CC) = 2 ns; note 5; Fig.7
7
20
ns
15
25
ns
6
15
ns
tr(C)
rise time of voltage output
10% to 90% amplitude;
−
6
15
ns
waveform
input rise time at pin 6:
tr(CC) = 2 ns; note 5; Fig.7
1997 Nov 26
8
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