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參數(shù)資料
| 型號： | EL2357C |
| 英文描述： | Dual, 500MHz Triple, Multiplexing Amplifiers; Temperature Range: -40°C to 85°C; Package: 48-QFN |
| 中文描述： | 125 MHz的單電源運算放大器夾緊三 |
| 文件頁數(shù)： | 8/21頁 |
| 文件大小： | 1617K |
| 代理商： | EL2357C |
16
EL2257C/EL2357C
125 MHz Single Supply, Clamping Op Amps
E
L
2257C/E
L2357C
Unlike amplifiers that clamp at the input and are there-
fore limited to non-inverting applications only, the
EL2257C/EL2357C output clamp architecture works for
both inverting and non-inverting gain applications.
There is also no maximum voltage difference limitation
between VIN and VCLAMP which is common on input
clamped architectures.
The voltage clamp operates for any voltage between
+1.2V above the GND pin, and the minimum output
voltage swing, VOP. Forcing the CLAMP pin much
below +1.2V can saturate transistors and should there-
fore be avoided. 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 EL2257C/EL2357C 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 VS+ pin.
EL2257C/EL2357C Comparator Application
The EL2257C/EL2357C can be used as a very fast, sin-
gle supply comparator by utilizing the clamp feature.
Most op amps used as comparators allow only slow
speed operation because of output saturation issues.
However, by applying a DC voltage to the CLAMP pin
of the EL2257C/EL2357C, the maximum output voltage
can be clamped, thus preventing saturation. Figure 4 is
amplifier A of an EL2257C implemented as a compara-
tor. 2.25V DC is applied to the CLAMP pin, as well as
the IN- pin. A differential signal is then applied between
the inputs. Figure 5 shows the output square wave that
results when a ±1V, 10 MHz triangular wave is applied,
while Figure 6 is a graph of propagation delay vs. over-
drive as a square wave is presented at the input.
Figure 4.
Figure 5.
Figure 6.
Propagation Delay vs Overdrive
EL2257/EL2357 as a Comparator
相關PDF資料 |
PDF描述 |
|---|---|
| EL2357C | 125 MHz Single Supply, Clamping Op Amps(125 MHz，單電源鉗位運算放大器) |
| EL2360C | Triple 130 MHz Current Feedback Amplifier |
| EL2360CN | Triple 130 MHz Current Feedback Amplifier |
| EL2360CS | Triple 130 MHz Current Feedback Amplifier |
| EL2386 | 250 MHz Triple Current Feedback Amp w/Disable |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| EL2357CN | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| EL2357CS | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:125 MHz Single Supply, Clamping Op Amps |
| EL2357CS-02 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| EL2360 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple 130MHz Current Feedback Amplifier |
| EL2360C | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:Triple 130 MHz Current Feedback Amplifier |
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