LM1203N 반도체 회로 부품 판매점
RGB Video Amplifier System
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 National Semiconductor |
January 1996
LM1203 RGB Video Amplifier System
General Description
The LM1203 is a wideband video amplifier system intended
for high resolution RGB color monitor applications In addi-
tion to three matched video amplifiers the LM1203 contains
three gated differential input black level clamp comparators
for brightness control and three matched attenuator circuits
for contrast control Each video amplifier contains a gain set
or ‘‘Drive’’ node for setting maximum system gain (Av e 4
to 10) as well as providing trim capability The LM1203 also
contains a voltage reference for the video inputs For high
resolution monochrome monitor applications see the
LM1201 Video Amplifier System datasheet
Block and Connection Diagram
Features
Y Three wideband video amplifiers (70 MHz b3dB)
Y Inherently matched (g0 1 dB or 1 2%) attenuators for
contrast control
Y Three externally gated comparators for brightness con-
trol
Y Provisions for independent gain control (Drive) of each
video amplifier
Y Video input voltage reference
Y Low impedance output driver
C1996 National Semiconductor Corporation TL H 9178
FIGURE 1
Order Number LM1203N
See NS Package Number NA28F
RRD-B30M56 Printed in U S A
TL H 9178 – 1
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage VCC Pins 1 13 23 28
(Note 1)
13 5V
Voltage at Any Input Pin VIN
Video Output Current I16 20 or 25
VCC t VIN t GND
28 mA
Power Dissipation PD
(Above 25 C) Derate Based on iJA and TJ
Thermal Resistance iJA
Junction Temperature TJ
2 5W
50 C W
150 C
Storage Temperature Range TSTG
b65 C to a150 C
Lead Temperature (Soldering 10 sec )
265 C
ESD susceptibility
1 kV
Human body model 100 pF discharged through a 1 5 kX
resistor
Operating Ratings (Note 9)
Temperature Range
0 C to 70 C
Supply Voltage (VCC)
10 8V s VCC s 13 2V
Electrical Characteristics See Test Circuit (Figure 2) TA e 25 C VCC1 e VCC2 e 12V
DC Static Tests S17 21 26 Open V12 e 6V V14 e 0V V15 e 2 0V unless otherwise stated
Label
Is
V11
lb
V14 l
V14 h
I14 l
I14 h
lclampa
lclampb
Vol
Voh
DVo(2V)
DVo(4V)
Parameter
Supply Current
Video Input Reference Voltage
Video Input Bias Current
Clamp Gate Low Input Voltage
Clamp Gate High Input Voltage
Clamp Gate Low Input Current
Clamp Gate High Input Current
Clamp Cap Charge Current
Clamp Cap Discharge Current
Video Output Low Voltage
Video Output High Voltage
Video Output Offset Voltage
Video Output Offset Voltage
Conditions
VCC 1 only
Any One Amplifier
Clamp Comparators On
Clamp Comparators Off
V14 e 0V
V14 e 12V
V5 8 or 10 e 0V
V5 8 or 10 e 5V
V5 8 or 10 e 0V
V5 8 or 10 e 5V
Between Any Two Amplifiers
V15 e 2V
Between Any Two Amplifiers
V15 e 4V
Typ
73
24
50
12
16
b0 5
0 005
850
b850
09
89
g0 5
g0 5
Tested
Limit (Note 2)
90 0
22
26
20
08
20
b5 0
1
500
b500
1 25
82
g50
g50
Design
Limit (Note 3)
Units
(Limits)
mA(max)
V(min)
V(max)
mA(max)
V(max)
V(min)
mA(max)
mA(max)
mA(min)
mA(min)
V(max)
V(min)
mV(max)
mV(max)
AC Dynamic Tests S17 21 26 Closed V14 e 0V V15 e 4V unless otherwise stated
Symbol
Parameter
Conditions
Typ
Tested
Design
Limit (Note 2) Limit (Note 3)
Units
(Limits)
Av max
DAv 5V
Video Amplifier Gain
Attenuation 5V
V12 e 12V VIN e 560 mVp-p 6 0
Ref Av max V12 e 5V
b10
45
V V(min)
dB
DAv 2V
Attenuation 2V
Ref Av max V12 e 2V
b40
dB
Av match Absolute gain match Av max V12 e 12V (Note 5)
g0 5
dB
DAv track1 Gain change between amplifiers V12 e 5V (Notes 5 8)
g0 1
g0 5
dB(max)
DAv track2 Gain change between amplifiers V12 e 2V (Notes 5 8)
g0 3
g0 7
dB(max)
THD
f (b3 dB)
tr
tf
Video Amplifier Distortion
Video Amplifier Bandwidth
(Notes 4 6)
Output Rise Time (Note 4)
Output Fall Time (Note 4)
V12 e 3V VO e 1 Vp-p
V12 e 12V
VO e 100 mVrms
VO e 4 Vp-p
VO e 4 Vp-p
05
70
5
7
%
MHz
ns
ns
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