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U2203B
RGB Video Amplifier System for Monitors
Description
The U2203B-A is a wideband video amplifier IC system especially designed for use in high-resolution RGB monitors. The IC includes three well matched video amplifiers, three gated differential amplifiers for blacklevel 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
Vs1 1 SUPPLY REG. 1k
D Independent gain control of each amplifier D ESD protection according to MIL-STD. 883
28 Vs1
CONTRAST CAP
2
27 R DRIVE
CONTRAST CAP
3
RED
40 90
26 R CLAMP (–)
R VIDEO IN
4
25 R VIDEO OUT
R CLAMP CAP
5
24 R CLAMP (+)
G VIDEO IN
6
GREEN
1k 40
23 Vs2
GROUND
7
90
22 G DRIVE
G CLAMP CAP
8 9
21 G CLAMP (– )
B VIDEO IN B CLAMP CAP
BLUE
1k 40 2.4V REF CONTRAST CONTROL 90
20 G VIDEO OUT
10
19 G CLAMP (+)
Vin REF CONTRAST
11 12
18 B DRIVE
17 B CLAMP (–)
Vs1
13 1.4V REF
U2203B
95 10749
16 B VIDEO OUT
CLAMP GATE
14
15 B CLAMP (+)
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A2, 27-Jan-97
1 (7)
U2203B
Pin Description
VS1 Ccontr Ccontr Vin, R Cclamp, R Vin, G GND Cclamp, G Vin, B Cclamp, B VBias Vcontr VS1 VGate 1 2 3 4 5 6 7 8 9 10 11 12 13 14
96 12388
28 VS1 27 RR 26 VR– 25 Vout, R 24 VR+ 23 VS2 22 RG 21 VG–
20 Vout, G 19 18 17 16 15 VG+ RB VB– Vout, B VB+
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Symbol VS1 Ccontr Ccontr Vin, R Cclamp, R Vin, G GND Cclamp, G Vin, G Cclamp, B VBias Vcontr VS1 VGate VB+ Vin, B VB– RB VG+ Vout, G VG– RG VS2 VR+ Vout, R VR– RR VS1
Function Supply voltage Contrast cap. Contrast cap. Video input (R) Clamp cap. (R) Video input (G) Ground Clamp cap. (G) Video input (B) Clamp cap. (B) Bias voltage (RGB-inputs) Contrast control Supply voltage Inverted clamp gate Clamp amplifier (B+) Video output (B) Clamp amplifier (B–) Drive resistor (B) Clamp amplifier (G+) Video output (G) Clamp amplifier (G–) Drive resistor (G) Supply voltage (outputs) Clamp amplifier (R+) Video output (R) Clamp amplifier (R–) Drive resistor (R) Supply voltage
Figure 2. Pinning
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
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TELEFUNKEN Semiconductors Rev. A2, 27-Jan-97
U2203B
Thermal Resistance
Parameters Junction ambient (DIP28) Symbol RthJA Value 46 Unit K/W
Electrical Characteristics
Test conditions unless otherwise specified, reference point Pin 7, Tamb = 25°C, VS1 = VS2 = 12 V, V12 = 6 V (contrast); V14 = 0 V (inv. gating); V15 = V19 = V24 = 2 V (brightness) Parameters DC-values Supply current Input bias voltage Input bias current Switching voltage gating “on” Switching voltage gating “off” Switching current gating ”on” Switching current gating ”off” Charge current clamping capacitor Discharge current clamping capacitor Video outputs, VO Low level High level Output offset between two p amplifiers Test Conditions / Pins VS1 only, Pins 1, 13 and 28 Pin 11 Pins 4, 6 and 9 Pin 14 Pin 14 V14 = 0.8 V Pin 14 V14 = 2.0 V Pin 14 V5,8,10 = 0 V Pins 5, 8 and 10 V5,8,10 = 5 V Pins 5, 8 and 10 Pins 16, 20 and 25 V5,8,10 = 0 V V5,8,10 = VS V15, V19, V24 = 2 V ICL+ ICL– 0.8 –1.2 1.0 –1.0 1.2 –0.8 IG “H” 5 8 Symbol IS1 VinREF IinREF VG “L” VG “H” IG “L” –1 2.3 1 0.8 Min. Typ. 60 Max. 70 2.5 10 Unit mA V mA V V
5 1.3 1.5 –0.01
2.0
mA mA
mA mA
Video gain Maximum video gain Middle video gain Dynamic gain range Video gain match (any 2 outputs) Video bandwidth unpeaked (C = 0 pF) optimal peaking (C = 27 pF) Video cross talk 1)
VO“L” VO“H” 8.0 DVO (2 V) V15, V19, V24 = 4 V DVO (4 V) V15 = V19 = V24 = 4 V (brightness); fIN = 1 MHz V12 = 12 V GVmax 16.0 V12 = 5 V GVmid GVD V12 = 12 V GVMmax GVMmid V12 = 5 V 1) GVM–30 V12 = 2.2 V V12 = 12 V (f–3dB) V12 = 12 V (f–3dB) fIN = 10 kHz fIN = 10 MHz BWV BWVP CT10kHz CT10MHz –50
0.8 8.6
1.0 ±50 ±50
V V mV mV
17.7 8.5 50 ±0.1 ±0.1 ±0.3 65 90
dB dB dB dB dB dB MHz MHz dB dB
–47
Measured 30 dB below maximum gain
TELEFUNKEN Semiconductors Rev. A2, 27-Jan-97
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U2203B
VS (+12V) 100 mF 1 100 nF 2 100 nF 5 mF 3 4 75 W G Video in 75 W 10 kW 5 mF 100 nF 10 kW 5 mF 9 10 100 nF 11 12 10 kW Black level gate I/P 100 nF 14 15 10 kW 10 kW 100 nF
93 7632
28 27
51 W
100 W
C 26 25 24 23 22 390 W R Clamp (–) To cascade driver (R)
R Video in
5 mF
10 kW 100 nF
5 6 7
100 nF 51 W 100 W
U2203B
8 21 20
C G Clamp (–) To cascade driver (G)
B Video in 75 W
390 W 19 18 C 17 16 390 W
91 W
G Clamp (–) To cascade driver (B)
13.