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參數(shù)資料
| 型號(hào)： | EL5246CY |
| 英文描述： | Replaced by PTN04050A : |
| 中文描述： | 100兆赫單電源軌至軌放大器 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 945K |
| 代理商： | EL5246CY |
16
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
EL514
4C
,E
L
5146C,
EL
5244C,
EL5246C,
E
L
5444C
Figure 1 shows the output of the EL5144C series ampli-
fier swinging rail to rail with RF = 1K, AV = +2 and RL
= 1M
. Figure 2 is with RL = 150 .
Choice of Feedback Resistor, RF
These amplifiers are optimized for applications that
require a gain of +1. Hence, no feedback resistor is
required. However, for gains greater than +1, the feed-
back resistor forms a pole with the input capacitance. As
this pole becomes larger, phase margin is reduced. This
causes ringing in the time domain and peaking in the fre-
quency domain. Therefore, RF has some maximum
value that should not be exceeded for optimum perfor-
mance. If a large value of RF must be used, a small
capacitor in the few picofarad range in parallel with RF
can help to reduce this ringing and peaking at the
expense of reducing the bandwidth.
As far as the output stage of the amplifier is concerned,
RF + RG appear in parallel with RL for gains other than
+1. As this combination gets smaller, the bandwidth
falls off. Consequently, RF also has a minimum value
that should not be exceeded for optimum performance.
For AV = +1, RF = 0 is optimum. For AV = -1 or +2
(noise gain of 2), optimum response is obtained with RF
between 300
and 1K . For AV = -4 or +5 (noise gain
of 5), keep RF between 300 and 15K .
Video Performance
For good video signal integrity, an amplifier is required
to maintain the same output impedance and the same fre-
quency response as DC levels are changed at the output.
This can be difficult when driving a standard video load
of 150
, because of the change in output current with
DC level. A look at the Differential Gain and Differen-
tial Phase curves for various supply and loading
conditions will help you obtain optimal performance.
Curves are provided for AV = +1 and +2, and RL = 150
and 10 K
tied both to ground as well as 2.5V. As with
all video amplifiers, there is a common mode sweet spot
for optimum differential gain / differential phase. For
example, with AV = +2 and RL = 150 tied to 2.5V, and
the output common mode voltage kept between 0.8V
and 3.2V, dG/dP is a very low 0.1% / 0.1°. This condi-
tion corresponds to driving an AC-coupled, double
terminated 75
coaxial cable. With AV = +1, RL =
150
tied to ground, and the video level kept between
0.85V and 2.95V, these amplifiers provide dG/dP per-
f o r m ance of 0.05 % / 0.20 ° . Th is c ond it ion is
representative of using the EL5144C series amplifier as
a buffer driving a DC coupled, double terminated, 75
coaxial cable. Driving high impedance loads, such as
signals on computer video cards, gives similar or better
dG/dP performance as driving cables.
Driving Cables and Capacitive Loads
The EL5144C series amplifiers can drive 50pF loads in
parallel with 150
with 4dB of peaking and 100pF with
7dB of peaking. If less peaking is desired in these appli-
cations, a small series resistor (usually between 5
and
50
) can be placed in series with the output to eliminate
most peaking. However, this will obviously reduce the
gain slightly. If your gain is greater than 1, the gain
resistor (RG) can then be chosen to make up for any gain
0V
5V
Figure 1
0V
5V
Figure 2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL5246CN | 100 MHz Single Supply Rail to Rail Amplifier |
| EL5246CS | Replaced by PT3343 : |
| EL5246C | 100 MHz Single Supply Rail to Rail Dual Amplifier(100MHz單電源滿幅度輸出雙路放大器) |
| EL5281C | Replaced by PTN04050A : |
| EL5281CS | Replaced by PTN04050A : |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL5246CY-T13 | 功能描述:IC AMP DUAL 100MHZ 10-MSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| EL5246CY-T7 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:100MHz Single-Supply Rail-to-Rail Amplifiers |
| EL5246CYZ | 功能描述:IC AMP DUAL 100MHZ 10-MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| EL5246CYZ-T13 | 功能描述:IC AMP DUAL 100MHZ 10-MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| EL5246CYZ-T7 | 功能描述:IC AMP DUAL 100MHZ 10-MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
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