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HCPL-7860 датащи(PDF) 12 Page - Agilent(Hewlett-Packard)

номер детали HCPL-7860
подробное описание детали  Optically Isolated Sigma-Delta Modulator
PDF  18 Pages
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производитель  HP [Agilent(Hewlett-Packard)]
домашняя страница  http://www.home.agilent.com
Logo HP - Agilent(Hewlett-Packard)

HCPL-7860 датащи(HTML) 12 Page - Agilent(Hewlett-Packard)

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Applications Information
Digital Current Sensing
As shown in Figure 16, using
the Isolated 2-chip A/D
converter to sense current can
be as simple as connecting a
current-sensing resistor, or
shunt, to the input and
reading output data through
the 3-wire serial output
interface. By choosing the
appropriate shunt resistance,
any range of current can be
monitored, from less than 1 A
to more than 100 A.
Even better performance can
be achieved by fully utilizing
the more advanced features of
the Isolated A/D converter,
such as the pre-trigger circuit,
which can reduce conversion
time to less than 1
µs, the fast
over-range detector for quickly
detecting short circuits,
different conversion modes
giving various resolution/speed
trade-offs, offset calibration
mode to eliminate initial offset
from measurements, and an
adjustable threshold detector
for detecting non-short circuit
overload conditions.
Figure 16. Typical Application Circuit.
R SHUNT
0.02
INPUT
CURRENT
V DD1
ISOLATED
+ 5 V
V IN+
V IN-
GND1
V DD2
MCLK
MDAT
GND2
C1
0.1 µF
+
CDAT
SCLK
CCLK
V DD
CLAT
CHAN
MCLK1
SDAT
MDAT1
CS
MCLK2
THR1
MDAT2
OVR1
GND
RESET
NON-ISOLATED
+ 5 V
C3
10 µF
+
HCPL-7860/
HCPL-786J
3-WIRE
SERIAL
INTERFACE
C2
0.1 µF
HCPL-0872



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