HCPL7840-500E Avago Technologies, HCPL7840-500E Datasheet

HCPL7840-500E

Manufacturer Part Number

HCPL7840-500E

Description

Manufacturer

Avago Technologies

Datasheet

1.HCPL7840300E.pdf (19 pages)

Specifications of HCPL7840-500E

Case

SOP8

Notes

NEW

Date_code

10+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

HCPL7840-500E

Manufacturer:

AVAGO/安华高

Quantity:

20 000

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Isolation Amplifier

Technical Data

Features

• 15 kV/

• Compact, Auto-Insertable

• 0.00025 V/V/

• 0.3 mV Input Offset Voltage

• 100 kHz Bandwidth

• 0.004% Nonlinearity

• Worldwide Safety Approval:

• Advanced Sigma-Delta (Σ−

• Fully Differential Circuit

• 0.8

Applications

• Motor Phase and Rail

• Inverter Current Sensing

• Switched Mode Power

• General Purpose Current

• General Purpose Analog

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.

Rejection at V

Standard 8-pin DIP Package

Temperature

UL 1577 (3750 Vrms/1 min.)

and CSA, IEC/EN/DIN EN

60747-5-2 (Option #060

only)

A/D Converter Technology

Topology

Current Sensing

Supply Signal Isolation

Sensing and Monitoring

Signal Isolation

m CMOS IC Technology

s Common-Mode

C Gain Drift vs.

= 1000 V

∆

)

Description

The HCPL-7840 isolation amplifier

family was designed for current

sensing in electronic motor drives.

In a typical implementation, motor

currents flow through an external

resistor and the resulting analog

voltage drop is sensed by the

HCPL-7840. A differential output

voltage is created on the other

side of the HCPL-7840 optical

isolation barrier. This differential

output voltage is proportional to

the motor current and can be con-

verted to a single-ended signal by

using an op-amp as shown in the

recommended application circuit.

Since common-mode voltage

swings of several hundred volts in

tens of nanoseconds are common

in modern switching inverter

motor drives, the HCPL-7840

was designed to ignore very high

common-mode transient slew

rates (of at least 10 kV/µs).

The high CMR capability of the

HCPL-7840 isolation amplifier

provides the precision and

stability needed to accurately

monitor motor current in high

noise motor control environ-

HCPL-7840

ments, providing for smoother

control (less “torque ripple”) in

various types of motor control

applications.

Functional Diagram

The product can also be used for

general analog signal isolation

applications requiring high

accuracy, stability, and linearity

under similarly severe noise con-

ditions. For general applications,

we recommend the HCPL-7840

(gain tolerance of ± 5%). The

HCPL-7840 utilizes sigma delta

(

technology, chopper stabilized

amplifiers, and a fully differential

circuit topology fabricated using

GND1

∑

DD1

IN+

IN–

∆

) analog-to-digital converter

DD1

–

SHIELD

–

DD2

GND2

DD2

OUT+

OUT–

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