INTEGRATED CIRCUITS
TDA4881
Advanced monitor video controller
Preliminary specification |
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November 1992 |
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File under Integrated Circuits, IC02 |
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Philips Semiconductors |
Preliminary specification |
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Advanced monitor video controller |
TDA4881 |
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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
QUICK REFERENCE DATA
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.
SYMBOL |
PARAMETER |
CONDITIONS |
MIN. |
TYP. |
MAX. |
UNIT |
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VP |
positive supply voltage (pin 7) |
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7.2 |
8.0 |
8.8 |
V |
IP |
supply current |
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− |
46 |
56 |
mA |
Vl(b-w) |
input voltage (black-to-white, pins 2, 5 and 8) |
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− |
0.7 |
1.0 |
V |
VO(b-w) |
output voltage (black-to-white, pins 19, 16 and 13) |
nominal contrast and |
− |
0.8 |
− |
V |
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nominal gain |
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IO(b-w) |
output current (black-to-white, pins 20, 17 and 14) |
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− |
50 |
− |
mA |
IM |
peak output current (pins 20, 17 and 14) |
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− |
− |
100 |
mA |
B |
bandwidth |
−3 dB |
70 |
− |
− |
MHz |
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Gnom |
nominal gain |
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− |
1 |
− |
dB |
Gv |
gain control range for 2 channels (relative to Gnom) |
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−4 |
− |
+2 |
dB |
Cv |
contrast control range (relative to Gnom) |
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−20 |
− |
+3 |
dB |
Vbl |
brightness control range |
nominal gain |
−80 |
− |
+240 |
mV |
Tamb |
operating ambient temperature range |
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0 |
− |
+70 |
°C |
ORDERING INFORMATION
EXTENDED |
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PACKAGE |
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TYPE NUMBER |
PINS |
PIN POSITION |
MATERIAL |
CODE |
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TDA4881 |
20 |
DIL |
plastic |
SOT146(1) |
Note
1. SOT146-1; 1996 November 27.
November 1992 |
2 |
Philips Semiconductors |
Preliminary specification |
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Advanced monitor video controller |
TDA4881 |
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Fig.1 Block diagram and basic application circuit for DC and AC coupling.
November 1992 |
3 |
Philips Semiconductors |
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Preliminary specification |
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Advanced monitor video controller |
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TDA4881 |
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PINNING |
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SYMBOL |
PIN |
DESCRIPTION |
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BRC |
1 |
brightness control |
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VI1 |
2 |
signal input Channel 1 |
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GC1 |
3 |
gain control Channel 1 |
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GND |
4 |
ground |
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VI2 |
5 |
signal input Channel 2 |
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CC |
6 |
contrast control |
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VP |
7 |
supply voltage |
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VI3 |
8 |
signal input Channel 3 |
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HBL |
9 |
horizontal blanking, switch off |
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CL |
10 |
input clamping, vertical blanking |
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GC3 |
11 |
gain control Channel 3 |
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FB3 |
12 |
feedback Channel 3 |
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VO3 |
13 |
voltage output Channel 3 |
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IO3 |
14 |
current output Channel 3 |
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FB2 |
15 |
feedback Channel 2 |
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VO2 |
16 |
voltage output Channel 2 |
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IO2 |
17 |
current output Channel 2 |
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FB1 |
18 |
feedback Channel 1 |
Fig.2 Pin configuration |
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VO1 |
19 |
voltage output Channel 1 |
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IO1 |
20 |
current output Channel 1 |
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November 1992 |
4 |
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