LM1279N National Semiconductor, LM1279N Datasheet - Page 3

• Manufacturer Part Number: LM1279N
• Description: IC VIDEO AMP SYS 110MHZ 20-DIP
• Manufacturer: National Semiconductor

Specifications of LM1279N

• Applications: General Purpose
• Number Of Circuits: 3
• -3db Bandwidth: 110MHz
• Current - Supply: 80mA
• Current - Output / Channel: 28mA
• Voltage - Supply, Single/dual (±): 7.5 V ~ 8.5 V
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM1279N

A
A
f(−3 dB)
t
t
V
V
V
t
t
t
t
T
r
f
r
f
r-prop
f-prop
T
stated. (Note 15)
(Video)
(Video)
(OSD)
(OSD)
A
Drive
V
pw
V match
V track
sep
sep
OH
AC Electical Characteristics
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 de-
grade 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 +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 current for V
does depend 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 socked 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 then 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: Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200 pF cap is charged to the specified voltage, then discharged directly into the
IC with no external series resistor (resistance of discharge path must be under 50 ).
A
Symbol
V 0.25V
OL
(Clamp)
(OSD)
= 25˚C; V
10 kHz
10 MHz
(OSD)
(OSD)
(OSD)
CC
A
V
±
supply pins 2 and 16 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
0.1 dB channel tracking.
CC1
Drive Control Range
Video Amplifier Bandwidth
(Notes 11, 12))
Parameter
Contrast Attenuation
Absolute Gain Match
Gain Change Between Amplifiers
Video Output Rise Time
Video Output Fall Time
Video Amplifier 10 kHz Isolation
Video Amplifier 10 MHz Isolation
OSD Black Level, Difference from
Video Black Level
OSD Output High Voltage (above
measured video black level)
Going into OSD Mode
Going out of OSD Mode
Starting OSD Propagation Delay
Ending OSD Propagation Delay
Input Clamp Pulse Width (Part of
Sandcastle Sync)
= V
CC2
= 8V. Manually adjust Video Output pins 13, 15, and 18 to 4V DC for the AC test unless otherwise
@
@
V
0V
A
max reference level) to the −3 dB corner frequency (f
V
IN
max
= 10 MHz for V
CC1
and V
(Continued)
IN
CC2
= 635 mV
resistor.
10
Conditions
Ref: A
V
V
V
V
V
V
V
V
V
V
V
OSD Mode ( Figure 2 )
OSD Mode ( Figure 2 )
Switching to OSD Mode ( Figure 3 )
Switching to Vid. Mode ( Figure 3 )
(Note 14)
minus the current through R
) at either 4V or 2V measured relative to an A
drive
10
10
10
O
O
O
10
10
OSD in
OSD in
sep
L
= 3.5 V
= 3.5 V
= 3.5 V
= 4V, V
= 4V to 2V (Notes 9, 10)
= 4V, V
= 4V (Note 13)
= 4V (Notes 11, 13)
10 MHz.
= 390 .
= 0V to 4V, V
PP
V
.
= 0.8V, OSD Mode
= 2.5V, OSD Mode
max, V
3
P-P
P-P
P-P
drive
drive
(Note 11)
(Note 11)
10
= 4V (Note 9)
= 4V,
= 0V
10
CC2
= 4V
L
is 7.7 mA with R
(I
supply
−3 dB
CC
= I
power on/off cycles.
CC1
).
+ I
L
V
CC2
= 390 .
max condition, V
(Note 5)
Typical
− I
±
±
−0.4
10.0
13.0
14.0
−35
−70
−50
110
3.6
3.2
2.1
5.0
PP
12
L
0.3
0.3
). The supply current for V
the signal will swing between 2V DC
10
10
(Note 6)
= 2V. This yields the mea-
Limit
= 4V. For example, at A
−0.7
200
2.4
www.national.com
CC2
V (max)
V (max)
ns (min)
Units
MHz
(pin 16)
dB
dB
dB
dB
dB
dB
ns
ns
ns
ns
ns
ns
V