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HCPL-7560

Optically Isolated Sigma-Delta (Σ-∆) Modulator

HP => Agilent Technologies 

Agilent HCPL-7560

Optically Isolated Sigma-Delta (Σ-∆)

Modulator

Data Sheet

Description

The HCPL-7560 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-7560

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.

Input

Curr ent

1

8

2

SIGMA-

DELTA

MOD./

3

ENCODE

7

DECODE

6

4

5

HCPL-7560

HCPL-0872

or

Digital Filter

MCU

or

DSP

A 0.1 µF bypass capacitor must be connected between pins VDD and Ground

Features

• 8-bit Linearity

• 200 ns Conversion Time (Pre-

Trigger Mode 2 with HCPL-0872)

• 8-bit Effective Resolution with 5 ìs

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

• 5% 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

Applications

• Motor Phase and Rail Current

Sensing

• Data Acquisition Systems

• Industrial Process Control

• Inverter Current Sensing

• General Purpose Current Sensing

and Monitoring

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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