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參數(shù)資料
| 型號： | EL8100IW-T7A |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 200MHz Rail-to-Rail Amplifiers |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 365K |
| 代理商： | EL8100IW-T7A |
9
FN7103.7
April 26, 2005
EL8100, EL8101
and peaking in the frequency domain. Therefore, R
F
has
some maximum value that should not be exceeded for
optimum performance. If a large value of R
F
must be used, a
small capacitor in the few Pico farad range in parallel with R
F
can help to reduce the ringing and peaking at the expense of
reducing the bandwidth.
As far as the output stage of the amplifier is concerned, the
output stage is also a gain stage with the load. R
F
and R
G
appear in parallel with R
L
for gains other than +1. As this
combination gets smaller, the bandwidth falls off.
Consequently, R
F
also has a minimum value that should not
be exceeded for optimum performance. For gain of +1, R
F
=0
is optimum. For the gains other than +1, optimum response
is obtained with R
F
between 300
to 1k
.
The EL8100, EL8101 have a gain bandwidth product of
100MHz. For gains
≥
5, its bandwidth can be predicted by the
following equation:
Video Performance
For good video performance, an amplifier is required to
maintain the same output impedance and the same
frequency response as DC levels are changed at the output.
This is especially difficult when driving a standard video load
of 150
, because the change in output current with DC level.
Special circuitry has been incorporated in the
EL8100, EL8101 to reduce the variation of the output
impedance with the current output. This results in dG and dP
specifications of 0.03% and 0.05
°
, while driving 150
at a
gain of 2. Driving high impedance loads would give a similar
or better dG and dP performance.
Driving Capacitive Loads and Cables
The EL8100, EL8101 can drive 15pF loads in parallel with
1k
with less than 5dB of peaking at gain of +1. If less
peaking is desired in applications, a small series resistor
(usually between 5
to 50
) can be placed in series with the
output to eliminate most peaking. However, this will reduce
the gain slightly. If the gain setting is greater than 1, the gain
resistor R
G
can then be chosen to make up for any gain loss
which may be created by the additional series resistor at the
output.
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, a back-termination series resistor at the
amplifier’s output will isolate the amplifier from the cable and
allow extensive capacitive drive. However, other applications
may have high capacitive loads without a back-termination
resistor. Again, a small series resistor at the output can help
to reduce peaking.
Disable/Power-Down
The EL8100 can be disabled and placed its output in a high
impedance state. The turn off time is about 25ns and the turn
on time is about 200ns. When disabled, the amplifier’s
supply current is reduced to 30μA typically, thereby
effectively eliminating the power consumption. The
amplifier’s power down can be controlled by standard TTL or
CMOS signal levels at the ENABLE pin. The applied logic
signal is relative to V
S
- pin. Letting the ENABLE pin float or
applying a signal that is less than 0.8V above V
S
- will enable
the amplifier. The amplifier will be disabled when the signal
at ENABLE pin is 2V above V
S
-.
Output Drive Capability
The EL8100, EL8101 do not have internal short circuit
protection circuitry. They have a typical short circuit current
of 70mA sourcing and 140mA sinking for the output is
connected to half way between the rails with a 10
resistor.
If the output is shorted indefinitely, the power dissipation
could easily increase such that the part will be destroyed.
Maximum reliability is maintained if the output current never
exceeds ±40mA. This limit is set by the design of the internal
metal interconnections.
Power Dissipation
With the high output drive capability of the EL8100, EL8101,
it is possible to exceed the 125
°
C absolute maximum
junction temperature under certain load current conditions.
Therefore, it is important to calculate the maximum junction
temperature for the application to determine if the load
conditions or package types need to be modified for the
amplifier to remain in the safe operating area.
The maximum power dissipation allowed in a package is
determined according to:
Where:
T
JMAX
= Maximum junction temperature
T
AMAX
= Maximum ambient temperature
θ
JA
= Thermal resistance of the package
The maximum power dissipation actually produced by an IC
is the total quiescent supply current times the total power
supply voltage, plus the power in the IC due to the load, or:
For sourcing:
For sinking:
Where:
V
S
= Total supply voltage
I
SMAX
= Maximum quiescent supply current
Gain
BW
×
100MHz
=
PD
MAX
T
--------------------------------------------
T
JA
–
=
PD
MAX
V
S
I
SMAX
V
S
V
OUT
–
(
)
V
R
L
---------------
×
+
×
=
PD
MAX
V
S
I
SMAX
V
OUT
V
S
-
–
(
)
I
LOAD
×
+
×
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL8101 | 200MHz Rail-to-Rail Amplifiers |
| EL8101IW-T7 | 200MHz Rail-to-Rail Amplifiers |
| EL8101IW-T7A | 200MHz Rail-to-Rail Amplifiers |
| EL8101IWZ-T7 | 200MHz Rail-to-Rail Amplifiers |
| EL8101IWZ-T7A | 200MHz Rail-to-Rail Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL8100IWZ-T7 | 功能描述:運(yùn)算放大器 - 運(yùn)放 EL8100IWZ 200MHZ R2R AMP RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| EL8100IWZ-T7A | 功能描述:運(yùn)算放大器 - 運(yùn)放 EL8100IWZ 200MHZ R2R AMP RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| EL8101 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:200MHz Rail-to-Rail Amplifiers |
| EL8101IW-T7 | 功能描述:IC OP AMP 200MHZ R-R SOT23-5 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| EL8101IW-T7A | 功能描述:高速運(yùn)算放大器 200 MHz Rail to Rail RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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