參數(shù)資料
型號(hào): ISL28136
廠商: Intersil Corporation
英文描述: 5MHz, Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Op Amps(5MHz,單/雙精度軌對(duì)軌輸入-輸出(RRIO)運(yùn)放)
中文描述: 5MHz的,單和雙精密軌至軌輸入,輸出(RRIO)運(yùn)算放大器(5MHz的,單/雙精度軌對(duì)軌輸入-輸出(RRIO)運(yùn)放)
文件頁數(shù): 12/15頁
文件大?。?/td> 790K
代理商: ISL28136
12
FN6153.2
June 28, 2007
3) When the slew rate of the input pulse is considerably
faster than the op amp’s slew rate. If the V
OUT
can’t keep up
with the IN+ signal, a differential voltage results, and visible
distortion occurs on the input and output signals. To avoid
this issue, keep the input slew rate below 1.9V/
μ
s, or use
appropriate current limiting resistors.
Large (>2V) differential input voltages can also cause an
increase in disabled I
CC
.
Using Only One Channel
The ISL28236 is a dual op amp. If the application only
requires one channel, the user must configure the unused
channel to prevent it from oscillating. The unused channel
will oscillate if the input and output pins are floating. This will
result in higher than expected supply currents and possible
noise injection into the channel being used. The proper way
to prevent this oscillation is to short the output to the
negative input and ground the positive input (as shown in
Figure 39).
Current Limiting
These devices have no internal current-limiting circuitry. If
the output is shorted, it is possible to exceed the Absolute
Maximum Rating for output current or power dissipation,
potentially resulting in the destruction of the device.
Power Dissipation
It is possible to exceed the +125°C maximum junction
temperatures under certain load and power-supply
conditions. It is therefore important to calculate the
maximum junction temperature (T
JMAX
) for all applications
to determine if power supply voltages, load conditions, or
package type need to be modified to remain in the safe
operating area. These parameters are related as follows:
where:
P
DMAXTOTAL
is the sum of the maximum power
dissipation of each amplifier in the package (PD
MAX
)
PD
MAX
for each amplifier can be calculated as follows:
where:
T
MAX
= Maximum ambient temperature
θ
JA
= Thermal resistance of the package
PD
MAX
= Maximum power dissipation of 1 amplifier
V
S
= Supply voltage (Magnitude of V
+
and V
-
)
I
MAX
= Maximum supply current of 1 amplifier
V
OUTMAX
= Maximum output voltage swing of the
application
R
L
= Load resistance
FIGURE 39. PREVENTING OSCILLATIONS IN UNUSED
CHANNELS
-
+
T
JMAX
T
MAX
θ
JA
xPD
MAXTOTAL
(
)
+
=
(EQ. 1)
PD
MAX
2*V
S
I
SMAX
V
S
(
- V
OUTMAX
)
V
L
----------------------------
×
+
×
=
(EQ. 2)
ISL28136, ISL28236
相關(guān)PDF資料
PDF描述
ISL28236 5MHz, Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Op Amps(5MHz,單/雙精密軌對(duì)軌輸入-輸出(RRIO)運(yùn)放)
ISL28138 4.5MHz, Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Op Amps with Very Low Input Bias Current(具有極低輸入偏流的4.5MHz, 單/雙精度軌對(duì)軌輸入-輸出(RRIO)運(yùn)放)
ISL28238 4.5MHz, Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Op Amps with Very Low Input Bias Current(具有極低輸入偏流的4.5MHz, 單/雙精密軌對(duì)軌輸入-輸出(RRIO)運(yùn)放)
ISL28158 34μA Micro-power Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps(34μA,微功率單/雙精度軌對(duì)軌輸入-輸出(RRIO),低輸入偏流運(yùn)放)
ISL28258 34μA Micro-power Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps(34μA,微功率單/雙精度軌對(duì)軌輸入-輸出(RRIO),低輸入偏流運(yùn)放)
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