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參數(shù)資料
| 型號： | EL2157CS-T13 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 125MHz Single Supply, Clamping Op Amps |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | SO-8 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大小： | 488K |
| 代理商： | EL2157CS-T13 |
EL2150CEL2157C
125 MHz Single Supply Clamping Op Amps
Applications Information
Contd
Forcing the CLAMP pin above VOP simply de-
activates the CLAMP feature In other words
one cannot expect to clamp any voltage higher
than what the EL2157C can drive to in the first
place If the clamp feature is not desired either
let the CLAMP pin float or connect it to the VSa
pin
EL2157C Comparator Application
The EL2157C can be used as a very fast single
supply comparator by utilizing the clamp fea-
ture Most op amps used as comparators allow
only slow speed operation because of output satu-
ration issues However by applying a DC voltage
to the CLAMP pin of the EL2157C the maxi-
mum output voltage can be clamped thus pre-
venting
saturation
Figure
4
below
is
the
EL2157C implemented as a comparator 25V DC
is applied to the CLAMP pin as well as the INb
pin A differential signal is then applied between
the inputs Figure 5 shows the output square
wave that results when a g1V 10 MHz triangu-
lar wave is applied while Figure 6 is a graph of
propagation delay vs overdrive as a square wave
is presented at the input
2150 – 62
Figure 4
2150 – 63
Figure 5
EL2157 as a Comparator
Propagation Delay vs Overdrive
2150 – 64
Figure 6
Video Sync Pulse Remover Application
All CMOS Analog to Digital Converters (ADs)
have a parasitic latch-up problem when subjected
to negative input voltage levels Since the sync
tip contains no useful video information and it is
a negative going pulse we can chop it off Figure
7 shows a unity gain connected EL2150C
EL2157C Figure 8 shows the complete input vid-
eo signal applied at the input as well as the out-
put signal with the negative going sync pulse re-
moved
2150 – 65
Figure 7
15
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL2157CS-T7 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:125MHz Single Supply, Clamping Op Amps |
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