ACPL-796J Просмотр технического описания (PDF) - Avago Technologies
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ACPL-796J Datasheet PDF : 16 Pages
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MOTOR
HV+
+–
RSENSE
FLOATING POSITIVE
SUPPLY
GATE
DRIVE
CIRCUIT
D1
5.1 V
R2a 39 :
R2b 39 : C2a
10 nF
ISOLATION
R1
BARRIER
C4 C1
10 PF 0.1 PF
VDD1
C2b
10 nF
VIN+
VIN–
GND1
VDD2
MCLKIN
MDAT
GND2
NON-
ISOLATED
5 V/3.3 V
C5
C3
10 PF 0.1 PF
GND1
ACPL-796J
GND2
HV–
Figure 19. Schematic for three conductor shunt connection.
Voltage Sensing
The ACPL-796J can also be used to isolate signals with am-
plitudes 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 rela-
tively small (less than 1 k) so that the input resistance
(33 k) and input bias current (0.5 A) do not affect the
accuracy of the measurement. An input bypass capacitor
is still required, although the 39 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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AV02-1670EN - July 27, 2016
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