LM1203 National Semiconductor, LM1203 Datasheet - Page 3

• Manufacturer Part Number: LM1203
• Description: RGB Video Amplifier System
• Manufacturer: National Semiconductor

Symbol
Vsep
10 kHz
Vsep
10 MHz
AC Dynamic Tests
Note 1 V
Note 2 These parameters are guaranteed and 100% production tested
Note 3 Design limits are guaranteed (but not 100% production tested) These limits are not used to calculate outgoing quality levels
Note 4 When measuring video amplifier bandwidth or pulse rise and fall times a double sided full ground plane printed circuit board without socket is recommend-
ed Video Amplifier 10 MHz isolation test also requires this printed circuit board
Note 5 Measure gain difference between any two amplifiers V
Note 6 Adjust input frequency from 10 kHz (Av
Note 7 Measure output levels of the other two undriven amplifiers relative to driven amplifier to determine channel separation Terminate the undriven amplifier
inputs to simulate generator loading Repeat test at f
Note 8
gain change between any two amplifiers with the Contrast Voltage V12 at either 5V or 2V measured relative to an Av max condition V12
Av max the three amplifiers gains might be 17 4 dB 16 9 dB and 16 4 dB and change to 7 3 dB 6 9 dB and 6 5 dB respectively for V12
measured typical
Note 9 Operating Ratings indicate conditions for which the device is functional See Electrical Specifications for guaranteed performance limits
using various peaking cups graph on next page
Peaking capacitors See Frequency Response
CC
Av track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three attenuators It is the difference in
supply pins 1 13 23 28 must be externally wired together to prevent internal damage during V
Video Amplifier 10 kHz Isolation
Video Amplifier 10 MHz Isolation
g
0 1 dB channel tracking
Parameter
S17 21 26 Closed V14
max
ref level) to the
IN
e
10 MHz for Vsep
V12
V12
IN
e
e
e
FIGURE 2 LM1203 Test Circuit
Conditions
b
1 Vp-p
12V (Note 7)
12V (Notes 4 7)
3 dB corner frequency (f
e
0V V15
e
10 MHz
3
e
4V unless otherwise stated (Continued)
b
b
b
Typ
3 dB)
65
46
Limit (Note 2)
CC
Tested
power on off cycles
Limit (Note 3)
Design
e
http
e
12V For example at
5V This yields the
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TL H 9178– 2
Units
dB
dB