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HCPL-7860-XXXE Fiches technique(PDF) 1 Page - Agilent(Hewlett-Packard)

No de pièce HCPL-7860-XXXE
Description  Optically Isolated Sigma-Delta Modulator
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Fabricant  HP [Agilent(Hewlett-Packard)]
Site Internet  http://www.home.agilent.com
Logo HP - Agilent(Hewlett-Packard)

HCPL-7860-XXXE Fiches technique(HTML) 1 Page - Agilent(Hewlett-Packard)

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Agilent HCPL-7860/HCPL-786J
Optically Isolated
Sigma-Delta (
Σ−∆
Σ−∆
Σ−∆
Σ−∆
Σ−∆) Modulator
Data Sheet
Features
••••• 12-bit Linearity
••••• 200 ns Conversion Time (Pre-
Trigger Mode 2 with HCPL-0872)
••••• 12-bit Effective Resolution with 5
µµµµµs Signal Delay (14-bit with 102
µµµµµs) (with HCPL-0872)
••••• Fast 3 µµµµµs Over-Range Detection
(with HCPL-0872)
••••• ± 200 mV Input Range with Single
5 V Supply
••••• 1% Internal Reference Voltage
Matching
••••• Offset Calibration (with HCPL-
0872)
••••• -40°C to +85°C Operating
Temperature Range
••••• 15 kV/µµµµµs Isolation Transient
Immunity
••••• Safety Approval: UL 1577, CSA
and IEC/EN/DIN EN 60747-5-2
Applications
••••• Motor Phase and Rail Current
Sensing
••••• Data Acquisition Systems
••••• Industrial Process Control
••••• Inverter Current Sensing
••••• General Purpose Current Sensing
and Monitoring
Description
The HCPL-7860/HCPL-786J
Optically Isolated Modulator
and HCPL-0872 Digital
Interface IC or digital filter
together form an isolated
programmable two-chip
analog-to-digital converter. The
isolated modulator allows
direct measurement of motor
phase currents in power
inverters.
In operation, the HCPL-7860/
HCPL-786J Isolated Modulator
(optocoupler with 3750 VRMS
dielectric withstand voltage
rating) converts a low-
bandwidth analog input into a
high-speed one-bit data stream
by means of a Sigma-Delta (
Σ−
∆) over-sampling modulator.
This modulation provides for
high noise margins and
excellent immunity against
isolation-mode transients. The
modulator data and on-chip
sampling clock are encoded
and transmitted across the
isolation boundary where they
are recovered and decoded
into separate high-speed clock
and data channels.
A 0.1 µF bypass capacitor must be connected between pins VDD and Ground
CAUTION: It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation, which may be induced by ESD.
SPI and QSPI are trademarks of Motorola Corp.
Microwire is a trademark of National Semiconductor Inc.
SIGMA
DELTA
MOD./
ENCODE
DECODE
1
2
3
4
8
7
6
5
Input
Current
HCPL-0872
or
Digital Filter
MCU
or
DSP
HCPL-7860


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