TDA4881 查看數據表（PDF） - Philips Electronics
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TDA4881 Datasheet PDF : 12 Pages
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Philips Semiconductors
Advanced monitor video controller
Preliminary specification
TDA4881
FEATURES
• Fully DC controllable
• 3 separate video channels
• Input black level clamping
• White level adjustment for 2 channels only
• Brightness control with correct grey scale tracking
• 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
GENERAL DESCRIPTION
The TDA4881 is a monolithic integrated RGB amplifier for
colour monitor systems with super VGA 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 TDA4851.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
VP
IP
Vl(b-w)
VO(b-w)
positive supply voltage (pin 7)
supply current
input voltage (black-to-white, pins 2, 5 and 8)
output voltage (black-to-white, pins 19, 16 and 13)
nominal contrast and
nominal gain
IO(b-w)
IM
B
output current (black-to-white, pins 20, 17 and 14)
peak output current (pins 20, 17 and 14)
bandwidth
−3 dB
Gnom
Gv
Cv
∆Vbl
Tamb
nominal gain
gain control range for 2 channels (relative to Gnom)
contrast control range (relative to Gnom)
brightness control range
nominal gain
operating ambient temperature range
MIN. TYP. MAX. UNIT
7.2 8.0 8.8 V
− 46 56
mA
− 0.7 1.0 V
− 0.8 −
V
− 50
−−
70 −
−1
−4 −
−20 −
−80 −
0−
−
100
−
−
+2
+3
+240
+70
mA
mA
MHz
dB
dB
dB
mV
°C
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
TDA4881
PINS
20
Note
1. SOT146-1; 1996 November 27.
PIN POSITION
DIL
PACKAGE
MATERIAL
plastic
CODE
SOT146(1)
November 1992
2
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