HCPL-7860 查看數據表（PDF） - Agilent Technologies, Inc
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HCPL-7860 Datasheet PDF : 18 Pages
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Voltage Sensing
The HCPL-7860/HCPL-786J
Isolated Modulator can also be
used to isolate signals with
amplitudes larger than its
recommended input range with
the use of a resistive voltage
divider at its input. The only
restrictions are that the
impedance of the divider be
relatively small (less than 1
kΩ) so that the input
resistance (280 kΩ) and input
bias current (1 µA) do not
affect the accuracy of the
measurement. An input bypass
capacitor is still required,
although the 39 Ω series
damping resistor is not (the
resistance of the voltage
divider provides the same
function). The low-pass filter
formed by the divider
resistance and the input
bypass capacitor may limit the
achievable bandwidth. To
obtain higher bandwidth, the
input bypass capacitor (C2)
can be reduced, but it should
not be reduced much below
1000 pF to maintain adequate
input bypassing of the isolated
modulator.
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Data subject to change.
Copyright © 2004 Agilent Technologies, Inc.
Obsolete 5989-1485EN
December 21, 2004
5989-2166EN
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