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TEMIC Semiconductors
TEMIC Semiconductors


U2203B

RGB Video Amplifier System for Monitors


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U2203B pdf
RGB Video Amplifier System for Monitors
U2203B
Description
The U2203B-A is a wideband video amplifier IC system
especially designed for use in high-resolution RGB moni-
tors. The IC includes three well matched video
amplifiers, three gated differential amplifiers for black-
level clamping and brightness control and the function for
simultaneously contrast control. Separate adjustment of
the maximum gain of each channel is also possible.
Features
D 3 channels, high bandwidth (90 MHz @ –3 dB)
D Matched attenuators for contrast control
D Black-level clamping for brightness control
D Independent gain control of each amplifier
D ESD protection according to MIL-STD. 883
Vs1 1
CONTRAST CAP 2
CONTRAST CAP 3
R VIDEO IN 4
SUPPLY
REG.
RED
1k
40
90
28 Vs1
27 R DRIVE
26 R CLAMP (–)
25 R VIDEO OUT
R CLAMP CAP 5
G VIDEO IN 6
GROUND 7
G CLAMP CAP 8
GREEN
1k
90
40
24 R CLAMP (+)
23 Vs2
22 G DRIVE
21 G CLAMP (–)
B VIDEO IN 9
B CLAMP CAP 10
Vin REF 11
CONTRAST 12
2.4V
REF
CONTRAST
CONTROL
Vs1 13
CLAMP GATE 14
1.4V
REF
BLUE
1k
90
40
20 G VIDEO OUT
19 G CLAMP (+)
18 B DRIVE
17 B CLAMP (–)
U2203B
16 B VIDEO OUT
15 B CLAMP (+)
95 10749
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A2, 27-Jan-97
1 (7)



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U2203B pdf
U2203B
Pin Description
VS1
Ccontr
1
2
28 VS1
27 RR
Ccontr
3
26 VR–
Vin, R
4
Cclamp, R 5
Vin, G
6
GND
7
Cclamp, G 8
25 Vout, R
24 VR+
23 VS2
22 RG
21 VG–
Vin, B
9
20 Vout, G
Cclamp, B 10
19 VG+
VBias
11
18 RB
Vcontr
12
17 VB–
VS1 13
16 Vout, B
VGate
14 15 VB+
96 12388
Figure 2. Pinning
Pin Symbol
Function
1 VS1 Supply voltage
2 Ccontr Contrast cap.
3 Ccontr Contrast cap.
4 Vin, R Video input (R)
5 Cclamp, R Clamp cap. (R)
6 Vin, G Video input (G)
7 GND Ground
8 Cclamp, G Clamp cap. (G)
9 Vin, G Video input (B)
10 Cclamp, B Clamp cap. (B)
11 VBias Bias voltage (RGB-inputs)
12 Vcontr Contrast control
13 VS1 Supply voltage
14 VGate Inverted clamp gate
15 VB+ Clamp amplifier (B+)
16 Vin, B Video output (B)
17 VB– Clamp amplifier (B–)
18 RB Drive resistor (B)
19 VG+ Clamp amplifier (G+)
20 Vout, G Video output (G)
21 VG– Clamp amplifier (G–)
22 RG Drive resistor (G)
23 VS2 Supply voltage (outputs)
24 VR+ Clamp amplifier (R+)
25 Vout, R Video output (R)
26 VR– Clamp amplifier (R–)
27 RR Drive resistor (R)
28 VS1 Supply voltage
Absolute Maximum Ratings
Parameters
Supply voltage
Pins 1, 13, 28 and 23
Input voltage at all other pins
Video output current
Pins 16, 20 and 25
Junction temperature
Storage temperature range
Symbol
VS
Vin
IV
Tj
Tstg
Value
13.5
0 toVS
28
125
–40 to 125
Unit
V
V
mA
°C
°C
Operating Range
Parameters
Ambient temperature range
Supply voltage range
Pins 1, 13, 23 and 28
Symbol
Tamb
VS2, VS1
Value
0 to 80
11.0 to 13.0
Unit
°C
V
2 (7) TELEFUNKEN Semiconductors
Rev. A2, 27-Jan-97



Part Number U2203B
Description RGB Video Amplifier System for Monitors
Maker TEMIC Semiconductors - TEMIC Semiconductors
Total Page 7 Pages
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