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LM1207 データシート(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM1207
部品情報  130 MHz/85 MHz RGB Video Amplifier System with Blanking
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1207 データシート(HTML) 3 Page - National Semiconductor (TI)

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AC Electrical Characteristics See AC Test Circuit (Figure 3) TA e 25 C VCC1 e VCC2 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
Limit
Units
(Note 5)
(Note 6)
AV max
Video Amplifier Gain
V12 e 4V VIN e 635 mVPP
70
60
VV (min)
Vdrive e 4V
169
156
dB (min)
D
AV2V
Attenuation
2V
Ref AV max V12 e 2V
b
6dB
D
AV 025V
Attenuation
025V
Ref AV max V12 e 025V
b
40
dB
D
Drive
Drive Control Range
Vdrive e 0V to 4V V12 e 4V
6
dB
AV match
Absolute Gain Match
AV max
V12 e 4V Vdrive e 4V (Note 9)
g
03
dB
AV track1
Gain Change Between Amplifiers
V12 e 4V to 2V (Notes 9 10)
g
01
dB
THD
Video Amplifier Distortion
VO e 1VPP f e 10 kHz
1
%
f(b3 dB)
Video Amplifier Bandwidth
V12 e 4V Vdrive e 4V
LM1205
130
MHz
(Notes 11 12)
VO e 4VPP
LM1207
85
tr(Video)
Video Output Rise Time (Note 11)
VO e 4VPP
LM1205
26
ns
LM1207
43
tf(Video)
Video Output Fall Time (Note 11)
VO e 4VPP
LM1205
36
ns
LM1207
43
Vsep 10 kHz
Video Amplifier 10 kHz Isolation
V12 e 4V (Note 13)
b
70
dB
Vsep 10 MHz
Video Amplifier 10 MHz Isolation
V12 e 4V (Notes 11 13)
b
50
dB
tr(Blank)
Blank Output Rise Time (Note 11)
Blank Output e 1VPP
7ns
tf(Blank)
Blank Output Fall Time (Note 11)
Blank Output e 1VPP
7ns
tpw(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
VCC supply pins 3 11 22 23 25 must be externally wired together to prevent internal damage during VCC power onoff cycles
Note 4
Human body model 100 pF discharged through a 15 kX resistor
Note 5
Typical specifications are specified at a25 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 VCC1 and VCC2 with RL e % see Figure 2’s test circuit The supply current for VCC2 (pin 23) also
depends on the output load With video output at 1V DC the additional current through VCC2 is8mAfor Figure 2’s test circuit
Note 8
Output voltage is dependent on load resistor Test circuit uses RL e 390X
Note 9
Measure gain difference between any two amplifiers VIN e 635 mVPP
Note 10 D
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
gain change between any two amplifiers with the contrast voltage (V12) at either 4V or 2V measured relative to an AV max condition V12 e 4V For example at AV
max the three amplifiers’ gains might be 171 dB 169 dB and 168 dB and change to 112 dB 109 dB and 107 dB respectively for V12 e 2V This yields the
measured typical g 01 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 (AV max reference level) to the b3 dB corner frequency (fb3dB)
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 fIN e 10 MHz for Vsep 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 VPP the signal will swing between 2V DC
and 6V DC
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