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

dielectric withstand voltage

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

µµµµµs)

(with HCPL-0872)

••••• Fast 3 µµµµµs 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/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

Agilent HCPL-7560

Optically Isolated Sigma-Delta (

ΣΣΣΣΣ-∆∆∆∆∆)

Modulator

Data Sheet

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.

SPI and QSPI are trademarks of Motorola Corp.

Microwire is a trademark of National Semiconductor Inc.

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.

SIGMA-

DELTA

MOD./

ENCODE

DECODE

1

2

3

4

8

7

6

5

Input

Curr ent

HCPL-0872

or

Digital Filter

MCU

or

DSP

HCPL-7560

-

-

-