LM1281N National Semiconductor, LM1281N Datasheet - Page 4

• Manufacturer Part Number: LM1281N
• Description: IC VIDEO AMP SYSTEM 28-DIP
• Manufacturer: National Semiconductor

Specifications of LM1281N

• Applications: General Purpose
• Number Of Circuits: 3
• -3db Bandwidth: 85MHz
• Current - Supply: 95mA
• Current - Output / Channel: 28mA
• Voltage - Supply, Single/dual (±): 11.4 V ~ 12.6 V
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM1281N

www.national.com
V
V
V
V
I
I
V
V
t
t
t
t
t
t
t
t
V
V
4l
4h
r
f
r-prop
f-prop
r
f
r-prop
f-prop
(OSD S)
See DC Test Circuit ( Figure 5 ), T
0V; V
OSDI
OSDh
4l
4h
V
OSD-out
V
V
OSD-out track
feed
feed
(OSD S)
(OSD)
(OSD)
OSD Electrical Characteristics
Note 1: Absolute Maximum Rating 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 de-
grade when the device is not operated under the listed test conditons.
Note 3: V
Note 4: Human body model, 100 pF discharged through a 1.5 k
Note 5: Typical specifications are specified at +25˚C and represent the most likely parametric norm.
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 (V
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 V
sured 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 recom-
mended. 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: A minimum pulse width of 200 ns is guaranteed for a horizontal line of 15 kHz. This limit is guaranteed by design. If a lower line rate is used a longer clamp
pulse may be required.
Note 15: During the AC test the 4V DC level is the center voltage of the AC output signal. For example, if the output is 4 V
and 6V DC.
Note 16: When V
shown in Figure 3 . Thus t
O-OSD(1V)
OSD-out
OSD-out match
Symbol
10 kHz
10 MHz
(OSD S)
(OSD)
(OSD S)
(OSD)
25
= 1V unless otherwise stated
CC
A
supply pins 6, 9, and 22 must be externally wired together to prevent internal damage during V
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
0.1 dB channel tracking.
1
= V
OSD Input Low Input Voltage
OSD Input High Input Voltage
OSD Select Low Input Voltage
OSD Select High Input Voltage
OSD Select Low Input Current
OSD Select High Input Current
OSD Black Level Output Voltage,
Difference from Video Output
OSD Output Voltage V
OSD Output V
Output Match between Channels
Output Variation between Channels
Video to OSD Switch Time (Note
11)
OSD to Video Switch Time (Note
11)
Video to OSD Propagation Delay
OSD to Video Propagation Delay
OSD Rise Time at V
OSD Fall Time at V
Starting OSD Propagation Delay
Ending OSD Propagation Delay
Video Feedthrough into OSD
Video Feedthrough into OSD
2
= V
r
(OSD) is actually a fall time and t
3
= 0V and the video input is 0.7V, then t
Parameter
PP
A
Attenuation
= 25˚C; V
O
O
(Note 11)
V
(Note 11)
PP
max reference level) to the −3 dB corner frequency (f
IN
= 10 MHz for V
CC1
f
= V
(OSD) is actually a rise time in this condition.
IN
CC1
= 400 mV
CC2
resistor.
13
r
Video Inputs are Selected
OSD Inputs are Selected
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
) at either 4V or 2V measured relative to an A
(OSD) = 11 ns and t
and V
sep 10 MHz
4
4
25
14
14
14
14
1
1
1
1
14
14
14
14
14
1
14
1
= 12V; V
L
= 0V
= 12V
= V
= V
= V
= V
= V
= V
= 1V
= 4V, V
= 2V, V
= 4V, V
= 4V to 2V, V
= 4V; V
= 4V; V
= 4V; V
= 4V; V
= 4V; V
= 4V; V
= 390 .
PP
CC2
2
2
2
2
2
2
.
4
= V
= V
= V
= V
= V
= V
.
with R
Conditions
13
Drive
Drive
Drive
25
25
25
25
25
25
3
3
3
3
3
3
= 4V; V
= 4V (Note 16)
= 4V (Note 16)
= V
= V
= 0V
= 0V
L
= 1V
= 1V
= 1V
= 1V
= 1V;
= 1V;
=
CC2
f
(OSD) = 4 ns. The Video Output waveform will be inverted from the one
= 2V
= 2V
= 2V
13
13
Drive
, see Figure 5’s test circuit. The supply current for V
is 8 mA for Figure 5 ’s test circuit.
= V
= V
14
= 2V
14
14
= 4V; V
= 4V
= 4V
−3 dB
CC
).
16
power on/off cycles.
= 4V; V
V
(Note 5)
Typical
max condition, V
±
±
−3.0
0.01
±
−70
−60
1.2
1.6
1.2
1.6
4.5
6.5
50
11
11
12
10
2.0
3.5
4
4
9
85
PP
Drive
the signal will swing between 2V DC
= 4V; V
13
13
(Note 6)
= 2V. This yields the mea-
Limit
= 4V. For example, at A
±
−5.0
0.4
2.0
0.8
2.0
2.0
30
175
4
= 4V; V
CC2
(pin 22) also
mV (max)
15
µA (max)
µA (min)
V (max)
V (max)
% (min)
V (min)
V (min)
Units
V
=
dB
dB
ns
ns
ns
ns
ns
ns
ns
ns
%
%
PP
V