參數(shù)資料
型號(hào)： LM1276AAA/NA
廠(chǎng)商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 音頻／視頻放大
英文描述： 1 CHANNEL, VIDEO PREAMPLIFIER, PDIP28
封裝： PLASTIC, DIP-28
文件頁(yè)數(shù)： 48/50頁(yè)
文件大?。?/td> 6075K
代理商： LM1276AAA/NA
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
CLAMP Low
Clamp Gate Low Input Current
V
23 = 2V
0.4
A
I
CLAMP High
Clamp Gate High Input Current
V
23 = 3V
0.4
A
t
CLAMP-VIDEO
Time from End of Clamp Pulse to
Start of Video
Referenced to Blue, Red and Green
inputs
50
ns
Note 1:
Limits of Absolute Maximum Ratings indicate below which damage to the device must not occur.
Note 2:
Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits.
Note 3:
All voltages are measured with respect to GND, unless otherwise specified.
Note 4:
Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 5:
Input from signal generator: t
r, tf < 1 ns.
Note 6:
Typical specifications are specified at +25°C and represent the most likely parametric norm.
Note 7:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. The guaranteed specifications apply only for the test
conditions listed. Some performance characteristics may change when the device is not operated under the listed test conditions.
Note 8:
The supply current specified is the quiescent current for V
CC and 5V Dig with RL = ∞. Load resistors are not required and are not used in the test circuit,
therefore all the supply current is used by the pre-amp.
Note 9:
Linearity Error is the maximum variation in step height of a 16 step staircase input signal waveform with a 0.7 V
P-P level at the input. All 16 steps equal,
with each at least 100 ns in duration.
Note 10:
dt/dV
CC = 200*(t5.5V–t4.5V)/ ((t5.5V + t4.5V)) %/V, where: t5.5V is the rise or fall time at VCC = 5.5V, and t4.5V is the rise or fall time at VCC = 4.5V.
Note 11:
ΔA
V track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three gain stages. It is the difference
in gain change between any two amplifiers with the contrast set to A
VC50% and measured relative to the AV max condition. For example, at AV max the three
amplifiers' gains might be 12.1 dB, 11.9 dB, and 11.8 dB and change to 2.2 dB, 1.9 dB and 1.7 dB respectively for contrast set to A
VC50%. This yields a typical
gain change of 10.0 dB with a tracking change of ±0.2 dB.
Note 12:
The ABL input provides smooth decrease in gain over the operational range of 0 dB to 5 dB:
ΔA
ABL = A(VABL = VABL MAX GAIN) – A (VABL =
V
ABL MIN GAIN). Beyond 5 dB the gain characteristics, linearity and pulse response may depart from normal values.
Note 13:
Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200 pF cap is charged to the specific voltage, then discharged directly into
the IC with no external series resistor (resistance of discharge path must be under 50
).
Note 14:
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 = 10 MHz for VSEP 10 MHz.
Note 15:
A minimum pulse width of 200 ns is the guaranteed minimum 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 16:
Adjust input frequency from 10 MHz (A
V max reference level) to the 3 dB corner frequency (f3 dB).
Note 17:
Once the spot killer has been activated, the LM1276 remains in the off state until V
CC is cycled (reduced below 0.5V and then restored to 5V).
7
www.national.com
200969 Version 2 Revision 4
Print Date/Time: 2011/07/11 11:20:12
LM1276
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