参数资料
| 型号： | ISL55002IB-T7 |
| 厂商： | Intersil |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP DUAL 200MHZ 8-SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 电压反馈 |
| 电路数： | 2 |
| 转换速率： | 300 V/µs |
| 增益带宽积： | 70MHz |
| -3db带宽： | 200MHz |
| 电流 - 输入偏压： | 600nA |
| 电压 - 输入偏移： | 1200µV |
| 电流 - 电源： | 8.5mA |
| 电流 - 输出 / 通道： | 140mA |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 30 V，±2.25 V ~ 15 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) |
8
FN7497.4
July 27, 2006
Product Description
The ISL55002 is a wide bandwidth, low power, and low offset
voltage feedback operational amplifier. This device is
internally compensated for closed loop gain of +1 or greater.
Connected in voltage follower mode and driving a 500
load, the -3dB bandwidth is around a 200MHz. Driving a
150
load and a gain of 2, the bandwidth is about 90MHz
while maintaining a 300V/s slew rate.
The ISL55002 is designed to operate with supply voltage
from +15V to -15V. That means for single supply application,
the supply voltage is from 0V to 30V. For split supplies
application, the supply voltage is from ±15V. The amplifier
has an input common-mode voltage range from 1.5V above
the negative supply (VS- pin) to 1.5V below the positive
supply (VS+ pin). If the input signal is outside the above
specified range, it will cause the output signal to be distorted.
The outputs of the ISL55002 can swing from -12.75V to
+13.4V for VS = ±15V. As the load resistance becomes
lower, the output swing is lower.
Choice of Feedback Resistor and Gain Bandwidth
Product
For applications that require a gain of +1, no feedback
resistor is required. Just short the output pin to the inverting
input pin. For gains greater than +1, the feedback resistor
forms a pole with the parasitic capacitance at the inverting
input. As this pole becomes smaller, the amplifier's phase
margin is reduced. This causes ringing in the time domain
and peaking in the frequency domain. Therefore, RF can't be
very big 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. For gain
of +1, RF = 0 is optimum. For the gains other than +1,
optimum response is obtained with RF with proper selection
of RF and RG (see Figures15 and 16 for selection).
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 of the change in output current with DC
level. The dG and dP of this device is about 0.01% 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 ISL55002 can drive a 47pF load in parallel with 500
with less than 3dB of peaking at gain of +1 and as much as
100pF at a gain of +2 with under 3db of peaking. 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 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.
Output Drive Capability
The ISL55002 does not have internal short circuit protection
circuitry. It has a typical short circuit current of 140mA. If the
output is shorted indefinitely, the power dissipation could
easily overheat the die or the current could eventually
compromise metal integrity. Maximum reliability is
maintained if the output current never exceeds ±60mA. This
limit is set by the design of the internal metal interconnect.
Note that in transient applications, the part is robust.
Short circuit protection can be provided externally with a
back match resistor in series with the output placed close as
possible to the output pin. In video applications this would be
a 75
resistor and will provide adequate short circuit
protection to the device. Care should still be taken not to
stress the device with a short at the output.
Power Dissipation
With the high output drive capability of the ISL55002, it is
possible to exceed the 150°C absolute maximum junction
temperature under certain load current conditions.
Therefore, it is important to calculate the maximum junction
temperature for an application to determine if load conditions
or package types need to be modified to assure operation of
the amplifier in a safe operating area.
The maximum power dissipation allowed in a package is
determined according to:
Where:
TJMAX = Maximum junction temperature
TAMAX = 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:
PD
MAX
T
JMAX
T
AMAX
–
Θ
JA
---------------------------------------------
=
ISL55002
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| ISL55002IBZ | 功能描述:运算放大器 - 运放 ISL59112IEZ-EVALZ EVAL BRD RHS COMPLIA 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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