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Numéro de référence | HCPL-786J | ||
Description | Optically Isolated Sigma-Delta Modulator | ||
Fabricant | Agilent | ||
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1 Page
Agilent HCPL-7860/HCPL-786J
Optically Isolated
Sigma-Delta (Σ−∆) Modulator
Data Sheet
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.
1
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.
8
Features
• 12-bit Linearity
• 200 ns Conversion Time (Pre-
Trigger Mode 2 with HCPL-0872)
• 12-bit Effective Resolution with 5
µs Signal Delay (14-bit with 102
µs) (with HCPL-0872)
• Fast 3 µs 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/µs Isolation Transient
Immunity
• Safety Approval: UL 1577, CSA
and IEC/EN/DIN EN 60747-5-2
Input
Current
2 SIGMA
7
DELTA
MOD./
DECODE
3 ENCODE
6
45
HCPL-7860
HCPL-0872
or
Digital Filter
MCU Applications
or
DSP
• Motor Phase and Rail Current
Sensing
• Data Acquisition Systems
• Industrial Process Control
• Inverter Current Sensing
• General Purpose Current Sensing
and Monitoring
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.
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Pages | Pages 18 | ||
Télécharger | [ HCPL-786J ] |
No | Description détaillée | Fabricant |
HCPL-7860 | Isolated 15-bit A/D Converter | Agilent(Hewlett-Packard) |
HCPL-7860 | Isolated 15-bit A/D Converter | Hewlett-Packard |
HCPL-7860 | Optically Isolated Sigma-Delta (S-D) Modulator | Avago |
HCPL-786J | Optically Isolated Sigma-Delta Modulator | Agilent |
US18650VTC5A | Lithium-Ion Battery | Sony |
TSPC106 | PCI Bus Bridge Memory Controller | ATMEL |
TP9380 | NPN SILICON RF POWER TRANSISTOR | Advanced Semiconductor |
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