參數(shù)資料
型號(hào): EL5420C
英文描述: Quad 12MHz Rail-to-Rail Input-Output Op Amps(四路12MHz滿(mǎn)幅度輸入-輸出運(yùn)算放大器)
中文描述: 四12MHz的軌到軌輸入輸出運(yùn)算放大器(四路12MHz的滿(mǎn)幅度輸入-輸出運(yùn)算放大器)
文件頁(yè)數(shù): 2/12頁(yè)
文件大小: 247K
代理商: EL5420C
10
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
EL5220C,
E
L
5420C
stage of the device begin to conduct and overvoltage
damage could occur.
Figure 2. Operation with Beyond-the Rails Input
Power Dissipation
With the high-output drive capability of the EL5220C
and EL5420C amplifiers, 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 load conditions 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:
TJMAX = Maximum Junction Temperature
TAMAX= Maximum Ambient Temperature
ΘJA = Thermal Resistance of the Package
PDMAX = Maximum Power Dissipation in 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
loads, or:
PDMAX = ∑i [VS * ISMAX + (VS+ -VOUTi) * ILOADi]
when sourcing, and
PDMAX = ∑i [VS * ISMAX + (VOUTi-VS-) * ILOADi]
when sinking.
Where:
i = 1 to 2 for Dual and 1 to 4 for Quad
VS = Total Supply Voltage
ISMAX = Maximum Supply Current Per Amplifier
VOUTi = Maximum Output Voltage of the Application
ILOADi = Load current
If we set the two PDMAX equations equal to each other,
we can solve for RLOADi to avoid device overheat. Fig-
ure 3 and Figure 4 provide a convenient way to see if the
device will overheat. The maximum safe power dissipa-
tion can be found graphically, based on the package type
and the ambient temperature. By using the previous
equation, it is a simple matter to see if PDMAX exceeds
the device's power derating curves. To ensure proper
1V
10S
VS=±2.5V
TA=25°C
AV=1
VIN=6VP-P
P
DM AX
T
JMAX
T
AM AX
Θ
JA
----------------------------------------------
=
相關(guān)PDF資料
PDF描述
EL5421C Quad 12MHz Rail-to-Rail Input-Output Buffer
EL5421CY Quad 12MHz Rail-to-Rail Input-Output Buffer
EL5444CU 100 MHz Single Supply Rail to Rail Amplifier
EL5444CN 100 MHz Single Supply Rail to Rail Amplifier
EL5444CS 100 MHz Single Supply Rail to Rail Amplifier
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