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TDA4884 Datasheet(PDF) 3 Page - NXP Semiconductors

Part No. TDA4884
Description  Advanced monitor video controller for OSD
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 3 page
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1997 Nov 26
3
Philips Semiconductors
Product specification
Three gain control video pre-amplifier for OSD
TDA4884
1
FEATURES
• 85 MHz video controller
• Fully DC controllable
• 3 separate video channels
• Input black-level clamping
• White level adjustment for 3 channels
• Contrast control for all 3 channels simultaneously
• Cathode feedback to internal reference for cut-off
control, which allows unstabilized video supply voltage
• Current outputs for RGB signal currents
• RGB voltage outputs to external peaking circuits
• Blanking and switch-off input for screen protection
• Sync on green operation possible
• On Screen Display (OSD) facility.
2
GENERAL DESCRIPTION
The TDA4884 is an RGB pre-amplifier for colour monitor
systems with SVGA performance, intended for DC or AC
coupling of the colour signals to the cathodes of the CRT.
With special advantages the circuit can be used in
conjunction with the TDA485x monitor deflection IC family.
3
QUICK REFERENCE DATA
4
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
positive supply voltage
7.2
8.0
8.8
V
IP
supply current
36
48
60
mA
Vi(b-w)
input voltage (black-to-white; pins 2, 5
and 8)
0.7
1.0
V
Vo(b-w)
output voltage (black-to-white; pins 19,
16 and 13)
nominal contrast; pins 3,
1 and 11 open-circuit
0.79
V
Io(b-w)
output current (black-to-white; pins 20,
17 and 14)
50
mA
with peaking
−−
100
mA
B
bandwidth
−3dB
70
85
MHz
Gnom
nominal gain (pins 2, 5 and 8 to pins 19,
16 and 13)
nominal contrast; pins 3,
1 and 11 open-circuit
1
dB
∆G
gain control difference for all channels
relative to Gnom
−5
+2.6
dB
CRcontrast
contrast control
Vi(CC) = 1 to 6 V
−22
+3.4
dB
COSD(min)
minimum contrast for OSD
Vi(CC) = 0.7 V
−−40
dB
Tamb
operating ambient temperature
−20
+70
°C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA4884
DIP20
plastic dual in-line package; 20 leads (300 mil)
SOT146-1




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