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HCPL-7560

Optically Isolated Sigma-Delta (Σ-∆) Modulator

Avago Technologies 

HCPL-7560

Optically Isolated Sigma-Delta (Σ-∆) Modulator

Data Sheet

Lead (Pb) Free

RoHS 6 fully

compliant

RoHS 6 fully compliant options available;

-xxxE denotes a lead-free product

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 mea-

surement of motor phase currents in power inverters.

In operation, the HCPL-7560 Isolated Modulator (op-

tocoupler 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 transmit-

ted across the isolation boundary where they are recov-

ered and decoded into separate high-speed clock and

data channels.

Features

• 8-bit Linearity

• 200 ns Conversion Time

(Pre-Trigger Mode 2 with HCPL-0872)

• 8-bit Effective Resolution with 5µs 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

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

NOTE: A 0.1 μF bypass capacitor must be connected between pins VDD1 and GND1 and between pins VDD2 and GND2.

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.

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