参数资料
| 型号： | EL8100IS-T7 |
| 厂商： | Intersil |
| 文件页数： | 14/14页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP 200MHZ R-R 8-SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 电压反馈 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 200 V/µs |
| 增益带宽积： | 100MHz |
| -3db带宽： | 200MHz |
| 电流 - 输入偏压： | 1.5µA |
| 电压 - 输入偏移： | 800µV |
| 电流 - 电源： | 2mA |
| 电流 - 输出 / 通道： | 65mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 5 V，±1.5 V ~ 2.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
9
FN7103.9
September 14, 2010
EL8100, EL8101
and peaking in the frequency domain. Therefore, RF has
some maximum value that should not be exceeded for
optimum performance. If a large value of RF must be used, a
small capacitor in the few Pico farad range in parallel with RF
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. RF and 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 gain of +1,
RF = 0 is optimum. For the gains other than +1, optimum
response is obtained with RF between 300Ω to 1kΩ.
The EL8100, EL8101 have a gain bandwidth product of
100MHz. For gains
≥5, its bandwidth can be predicted by
Equation 1:
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
Ω, 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 150Ω 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
Ω with less than 5dB of peaking at gain of +1. If less
peaking is desired in applications, a small series resistor
(usually between 5
Ω to 50Ω) 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 RG 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 30A 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 VS- pin. Letting the ENABLE pin float or
applying a signal that is less than 0.8V above VS- will enable
the amplifier. The amplifier will be disabled when the signal
at the ENABLE pin is 2V above VS-.
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
Ω 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 Equation 2:
Where:
TJMAX = Maximum junction temperature
TAMAX = Maximum ambient temperature
θJA = 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, Equation 3:
For sinking, Equation 4:
Where:
VS = Total supply voltage
ISMAX = Maximum quiescent supply current
Gain BW
×
100MHz
=
(EQ. 1)
PDMAX
TJMAX TAMAX
–
θ
JA
---------------------------------------------
=
(EQ. 2)
PDMAX
VS ISMAX VS VOUT
–
()
VOUT
RL
----------------
×
+
×
=
(EQ. 3)
PDMAX
VS ISMAX VOUT VS-
–
() I
LOAD
×
+
×
=
(EQ. 4)
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相关代理商/技术参数 |
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| EL8100ISZ | 功能描述:运算放大器 - 运放 EL8100ISZ 200MHZ R2R AMP RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| EL8100ISZ-T13 | 功能描述:运算放大器 - 运放 EL8100ISZ 200MHZ R2R AMP RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| EL8100ISZ-T7 | 功能描述:运算放大器 - 运放 EL8100ISZ 200MHZ R2R AMP RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| EL8100IW-T7 | 功能描述:运算放大器 - 运放 200MHZ R-R RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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