Fully Integrated, Hall Effect-Based Linear Current Sensor IC

with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

ACS756xCB

8

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Output Voltage versus Sampled Current

Total Output Error at 0 A and at Half-Scale Current

Accuracy

Accuracy

Accuracy

25°C Only

Accuracy

25°C Only

Accuracy

25°C Only

Accuracy

0 A

v r

O e ∆Temp erature

Average

v r

O e ∆Temp erature

v r

O e ∆Temp erature

Half Scale

DEFINITIONS OF DYNAMIC RESPONSE CHARACTERISTICS

Primary Current

Transducer Output

90

0

I (%)

Propagation Time, t

PROP

t

Primary Current

Transducer Output

90

10

0

I (%)

t

When the supply is ramped to its operating voltage, the device

requires a finite time to power its internal components before

responding to an input magnetic field.

voltage to settle within ±10% of its steady state value under an

applied magnetic field, after the power supply has reached its

chart at right.

The time interval between a) when the device reaches 10% of its

full scale value, and b) when it reaches 90% of its full scale value.

The rise time to a step response is used to derive the bandwidth

are detrimentally affected by eddy current losses observed in the

conductive IC ground plane.

The time required for the device output to reflect a change in

the primary current signal. Propagation delay is attributed to

inductive loading within the linear IC package, as well as in the

inductive loop formed by the primary conductor geometry. Propa-

gation delay can be considered as a fixed time offset and may be

compensated.