ACPL-7970 View Datasheet(PDF) - Avago Technologies
Part Name
Description
MFG CO.
'ACPL-7970' PDF : 18 Pages View PDF
Voltage Sensing
The ACPL-7970 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
(24 kΩ) and input bias current (0.3 mA) do not affect the
accuracy of the measurement. An input bypass capacitor
is still required, although the damping resistor is not
(the resistance of the voltage divider provides the same
function). The low-pass filter formed by the divider resis-
tance and the input bypass capacitor may limit the achiev-
able 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 © 2005-2012 Avago Technologies. All rights reserved.
AV02-2856EN - November 29, 2012
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