LM1205 National Semiconductor, LM1205 Datasheet - Page 3

• Manufacturer Part Number: LM1205
• Description: 130 MHz/85 MHz RGB Video Amplifier System with Blanking
• Manufacturer: National Semiconductor

A
A
A
THD
f (
t
t
V
V
t
t
t
r
f
r
f
pw
AC Electrical Characteristics
adjust Video Output pins 17 20 and 26 to 4V DC for the AC test unless otherwise stated (Note 14)
(Video)
(Blank)
Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur
Note 2 Operating Ratings indicate conditions for which the device is functional but do not guarantee specific performance limits For guaranteed specifications
and test conditions see the Electrical Characteristics The guaranteed specifications apply only for the test conditions listed Some performance characteristics
may degrade when the device is not operated under the listed test conditions
Note 3 V
Note 4 Human body model 100 pF discharged through a 1 5 k
Note 5 Typical specifications are specified at
Note 6 Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level)
Note 7 The supply current specified is the quiescent current for V
depends on the output load With video output at 1V DC the additional current through V
Note 8 Output voltage is dependent on load resistor Test circuit uses R
Note 9 Measure gain difference between any two amplifiers V
Note 10
gain change between any two amplifiers with the contrast voltage (V12) at either 4V or 2V measured relative to an A
max the three amplifiers’ gains might be 17 1 dB 16 9 dB and 16 8 dB and change to 11 2 dB 10 9 dB and 10 7 dB respectively for V12
measured typical
Note 11 When measuring video amplifier bandwidth or pulse rise and fall times a double sided full ground plane printed circuit board without socket is
recommended Video amplifier 10 MHz isolation test also requires this printed circuit board The reason for a double sided full ground plane PCB is that large
measurement variations occur in single sided PCBs
Note 12 Adjust input frequency from 10 MHz (A
Note 13 Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation Terminate the undriven
amplifier inputs to simulate generator loading Repeat test at f
Note 14 During the AC tests the 4V DC level is the center voltage of the AC output signal For example if the output is 4 V
and 6V DC
(Video)
sep
sep
(Blank)
V max
A
A
Drive
V match
V track1
b
Symbol
V 2V
V 0 25V
(Clamp)
3 dB)
10 kHz
10 MHz
CC
A
V
supply pins 3 11 22 23 25 must be externally wired together to prevent internal damage during V
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
g
Video Amplifier Gain
Attenuation
Attenuation
Drive Control Range
Absolute Gain Match
Gain Change Between Amplifiers
Video Amplifier Distortion
Video Amplifier Bandwidth
(Notes 11 12)
Video Output Rise Time (Note 11)
Video Output Fall Time (Note 11)
Video Amplifier 10 kHz Isolation
Video Amplifier 10 MHz Isolation
Blank Output Rise Time (Note 11)
Blank Output Fall Time (Note 11)
Min Back Porch Clamp Pulse Width
0 1 dB channel tracking
Parameter
2V
0 25V
a
V
25 C and represent the most likely parametric norm
A
max reference level) to the
V
max
IN
See AC Test Circuit (Figure 3) T
IN
e
CC1
e
resistor
10 MHz for V
V12
V
Ref A
Ref A
V
V12
V12
V
V12
V
V
V
V12
V12
Blank Output
Blank Output
635 mV
and V
drive
drive
O
O
O
O
L
e
e
e
e
e
e
e
e
e
e
e
CC2
PP
e
V
V
e
1 V
4 V
4 V
4 V
390
4V V
4V V
4V to 2V (Notes 9 10)
4V V
4V (Note 13)
4V (Notes 11 13)
b
max V12
max V12
with R
3
4V
0V to 4V V12
3 dB corner frequency (f
sep 10 MHz
PP
PP
PP
PP
Conditions
IN
drive
drive
f
L
e
e
e
e
e
CC2
1 V
1 V
% see Figure 2’s test circuit The supply current for V
10 kHz
e
e
e
e
635 mV
PP
PP
is 8 mA for Figure 2’s test circuit
4V (Note 9)
4V
2V
0 25V
e
PP
4V
LM1205
LM1207
LM1205
LM1207
LM1205
LM1207
A
b
3 dB
e
)
25 C V
CC
V
max condition V12
power on off cycles
(Note 5)
Typical
CC1
g
g
b
b
b
16 9
PP
130
200
7 0
b
2 6
4 3
3 6
4 3
85
6
1
7
7
0 3
0 1
40
70
50
the signal will swing between 2V DC
6
e
V
CC2
(Note 6)
e
Limit
15 6
6 0
4V For example at A
e
http
e
2V This yields the
12V Manually
CC2
www national com
(pin 23) also
V V (min)
dB (min)
Units
MHz
dB
dB
dB
dB
dB
dB
dB
ns
ns
ns
ns
ns
%
V