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參數(shù)資料
| 型號(hào)： | LM1269NA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 110 MHz I2C Compatible RGB Video Amplifier System with OSD & DACs |
| 中文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 1676K |
| 代理商： | LM1269NA |
External Interface Signals Electrical Characteristics
(Continued)
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:
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
).
Note 6:
Typical specifications are specified at +25C and represent the most likely parametric norm.
Note 7:
Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
The supply current specified is the quiescent current for V
CC
with R
L
=
∞
. 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 variation in step height of a 16 step staircase input signal waveform with 0.7 V
P-P
level at the input, subdivided into 16 equal steps,
with each step approximately 100 ns in width.
Note 10:
Input from signal generator: t
, t
<
1 ns. Scope and generator response used for testing: t
r
= 1.1 ns, t
f
= 0.9 ns. Using the RSS technique the scope and
generator response have been removed from the output rise and fall times.
Note 11:
A
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
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
V
10.0 dB with a tracking change of
±
0.2 dB.
Note 12:
ABL should provide smooth decrease in gain over the operational range of 0 dB to –6 dB
A
ABL
= A(V
ABL
= V
ABL Max Gain
) A(V
ABL
= V
ABL Min Gain
)
Beyond –6 dB the gain characteristics, linearity, pulse response, and/or behavior may depart from normal values.
Note 13:
Adjust input frequency from 10 MHz (A
V
max reference level) to the 3 dB corner frequency (f
3 dB
).
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 V
sep 10 MHz
.
Note 15:
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 16:
The video black level is used for this test. OSD amplitude is measured from the video black level to the OSD white level.
Note 17:
Limits met by matching the external resistor going to pin 24 to the H Flyback voltage.
1
2
and measured relative to the A
max condition. For example, at A
max the three amplifiers’
1
2
. This yields a typical gain change of
L
www.national.com
5
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