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LM1205A データシート(PDF) 4 Page - Texas Instruments

部品番号 LM1205A
部品情報  130 MHz/85 MHz RGB Video Amplifier System with Blanking
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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AC Electrical Characteristics (Note 14)
See AC Test Circuit (
Figure 3 ),T
A = 25˚C; VCC1 = VCC2 = 12V. Manually adjust Video Output pins 17, 20, and 26 to 4V DC
for the AC test unless otherwise stated.
Symbol
Parameter
Conditions
Typical
Limit
Units
(Note 5)
(Note 6)
A
V max
Video Amplifier Gain
V12 = 4V, V
IN = 635 mVPP
7.0
6.0
V/V (min)
V
drive = 4V
16.9
15.6
dB (min)
∆A
V2V
Attenuation @ 2V
Ref: A
V max, V12 = 2V
−6
dB
∆A
V 0.25V
Attenuation @ 0.25V
Ref: A
V max, V12 = 0.25V
−40
dB
∆Drive
Drive Control Range
V
drive = 0V to 4V, V12 = 4V
6
dB
A
V match
Absolute Gain Match @ A
V max
V12 = 4V, V
drive = 4V (Note 9)
±0.3
dB
A
V track1
Gain Change Between Amplifiers
V12 = 4V to 2V (Note 9) (Note 10)
±0.1
dB
THD
Video Amplifier Distortion
V
O = 1VPP,f = 10 kHz
1
%
f (−3 dB)
Video Amplifier Bandwidth
V12 = 4V, V
drive = 4V,
LM1205A
130
MHz
(Note 11) (Note 12)
V
O = 4VPP
LM1207A
85
t
r(Video)
Video Output Rise Time (Note 11)
V
O = 4VPP
LM1205A
2.6
ns
LM1207A
4.3
t
f(Video)
Video Output Fall Time (Note 11)
V
O = 4VPP
LM1205A
3.6
ns
LM1207A
4.3
V
sep 10 kHz
Video Amplifier 10 kHz Isolation
V12 = 4V (Note 13)
−70
dB
V
sep 10 MHz
Video Amplifier 10 MHz Isolation
V12 = 4V (Note 11) (Note 13)
−50
dB
t
r(Blank)
Blank Output Rise Time (Note 11)
Blank Output = 1V
PP
7ns
t
f(Blank)
Blank Output Fall Time (Note 11)
Blank Output = 1V
PP
7ns
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 de-
grade 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 on/off cycles.
Note 4: Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
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 VCC1 and VCC2 with RL = ∞, 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 is 8 mA for Figure 2 ’s test circuit.
Note 8: Output voltage is dependent on load resistor. Test circuit uses RL = 390Ω.
Note 9: Measure gain difference between any two amplifiers. VIN = 635 mVPP.
Note 10:
∆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 = 4V. For example, at AV
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 = 2V. This yields the mea-
sured typical ± 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 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 (AV max reference level) to the −3 dB corner frequency (f−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 fIN = 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.
Note 15: 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
Ω).
3
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