Philips TDA4881 Datasheet
INTEGRATED CIRCUITS
DATA SH EET
TDA4881
Advanced monitor video controller
Preliminary specification
File under Integrated Circuits, IC02
November 1992
Philips Semiconductors Preliminary specification
Advanced monitor video controller TDA4881
FEATURES
• Fully DC controllable
• 3 separate video channels
• Input black level clamping
• White level adjustment for 2 channels only
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.
• 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
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
I
P
V
l(b-w)
V
O(b-w)
positive supply voltage (pin 7) 7.2 8.0 8.8 V
supply current − 46 56 mA
input voltage (black-to-white, pins 2, 5 and 8) − 0.7 1.0 V
output voltage (black-to-white, pins 19, 16 and 13) nominal contrast and
− 0.8 − V
nominal gain
I
O(b-w)
I
M
output current (black-to-white, pins 20, 17 and 14) − 50 − mA
peak output current (pins 20, 17 and 14) −−100 mA
B bandwidth −3dB 70 −− MHz
G
G
C
∆V
T
nom
v
v
bl
amb
nominal gain − 1 − dB
gain control range for 2 channels (relative to G
contrast control range (relative to G
) −20 − +3 dB
nom
) −4 − +2 dB
nom
brightness control range nominal gain −80 − +240 mV
operating ambient temperature range 0 − +70 °C
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
PINS PIN POSITION MATERIAL CODE
TDA4881 20 DIL plastic SOT146
Note
1. SOT146-1; 1996 November 27.
November 1992 2
PACKAGE
(1)
Philips Semiconductors Preliminary specification
Advanced monitor video controller TDA4881
Fig.1 Block diagram and basic application circuit for DC and AC coupling.
November 1992 3
Philips Semiconductors Preliminary specification
Advanced monitor video controller TDA4881
PINNING
SYMBOL PIN DESCRIPTION
1 brightness control
2 signal input Channel 1
3 gain control Channel 1
5 signal input Channel 2
6 contrast control
7 supply voltage
8 signal input Channel 3
11 gain control Channel 3
12 feedback Channel 3
13 voltage output Channel 3
14 current output Channel 3
15 feedback Channel 2
16 voltage output Channel 2
17 current output Channel 2
18 feedback Channel 1
19 voltage output Channel 1
20 current output Channel 1
Fig.2 Pin configuration
BR
C
V
I1
G
C1
GND 4 ground
V
I2
C
C
V
P
V
I3
HBL 9 horizontal blanking, switch off
CL 10 input clamping, vertical blanking
G
C3
FB
3
V
O3
I
O3
FB
2
V
O2
I
O2
FB
1
V
O1
I
O1
November 1992 4
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