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參數(shù)資料
| 型號： | LM1209 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 運動控制電子 |
| 英文描述： | 130 MHz/100 MHz RGB Video Amplifier System with Blanking |
| 中文描述： | 130 MHz/100 MHz的RGB視頻信號放大器系統(tǒng)的沖裁 |
| 文件頁數(shù)： | 3/25頁 |
| 文件大小： | 434K |
| 代理商： | LM1209 |
AC Electrical Characteristics
See AC Test Circuit (Figure 3), T
A
e
25
§
C; V
CC1
e
V
CC2
e
12V. Manually
adjust Video Output pins 17, 20, and 26 to 4V DC for the AC test unless otherwise stated. (Note 14).
Symbol
Parameter
Conditions
Typical
(Note 5)
Limit
(Note 6)
Units
A
V max
Video Amplifier Gain
V12
e
4V, V
IN
e
635 mV
PP
V
drive
e
4V
7.0
6.0
V/V (min)
16.9
15.6
dB (min)
D
A
V 2V
Contrast Attenuation
@
2V
Ref: A
V
max, V12
e
2V
b
6
dB
D
A
V 0.25V
Contrast Attenuation
@
0.25V
Ref: A
V
max, V12
e
0.25V
b
40
dB
D
Drive
2V
Drive Attenuation
@
2V
Ref: A
V
max, V
drive
e
2V
b
6
dB
D
Drive
0.25V
Drive Attenuation
@
0.25V
Ref: A
V
max, V
drive
e
0.25V
b
40
dB
A
V match
Absolute Gain Match
@
A
V
max
V12
e
4V, V
drive
e
4V (Note 9)
g
0.3
dB
A
V track1
Gain Change Between Amplifiers
V12
e
4V to 2V (Notes 9, 10)
g
0.1
dB
THD
Video Amplifier Distortion
V
O
e
1 V
PP
, f
e
10 kHz
1
%
f (
b
3 dB)
Video Amplifier Bandwidth
(Notes 11, 12)
V12
e
4V, V
drive
e
4V,
V
O
e
4 V
PP
LM1208
130
MHz
LM1209
100
t
r
(Video)
Video Output Rise Time (Note 11)
V
O
e
4 V
PP
LM1208
2.8
ns
LM1209
3.2
t
f
(Video)
Video Output Fall Time (Note 11)
V
O
e
4 V
PP
LM1208
3.4
ns
LM1209
3.6
V
sep
10 kHz
Video Amplifier 10 kHz Isolation
V12
e
4V (Note 13)
b
70
dB
V
sep
10 MHz
Video Amplifier 10 MHz Isolation
V12
e
4V (Notes 11, 13)
b
50
dB
t
r
(Blank)
Blank Output Rise Time (Note 11)
Blank Output
e
1 V
PP
7
ns
t
f
(Blank)
Blank Output Fall Time (Note 11)
Blank Output
e
1 V
PP
7
ns
t
pw
(Clamp)
Min. Back Porch Clamp Pulse Width
200
ns
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
CC
supply pins 3, 11, 22, 23, 25 must be externally wired together to prevent internal damage during V
CC
power on/off cycles.
Note 4:
Human body model, 100 pF discharged through a 1.5 k
X
resistor.
Note 5:
Typical specifications are specified at
a
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
CC1
and V
CC2
with R
L
e
%
, seeFigure 2’s test circuit. The supply current for V
CC2
(pin 23) also
depends on the output load. With video output at 1V DC, the additional current through V
CC2
is 8 mA for Figure 2’s test circuit.
Note 8:
Output voltage is dependent on load resistor. Test circuit uses R
L
e
390
X
.
Note 9:
Measure gain difference between any two amplifiers. V
IN
e
635 mV
PP
.
Note 10:
D
A
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
gain change between any two amplifiers with the contrast voltage (V12) at either 4V or 2V measured relative to an A
V
max condition, V12
e
4V. For example, at A
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 V12
e
2V. This yields the
measured typical
g
0.1 dB channel tracking.
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
V
max reference level) to the
b
3 dB corner frequency (f
b
3 dB
).
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
IN
e
10 MHz for V
sep 10 MHz
.
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
PP
the signal will swing between 2V DC
and 6V DC.
http://www.national.com
3
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