ACS724 datasheet(13/25 Pages) ALLEGRO

13 / 25 page

Automotive-Grade, Galvanically Isolated Current Sensor IC

With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package

ACS724

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

xLLCTR-50AB PERFORMANCE CHARACTERISTICS

: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V, CF = 0,

unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.1

Max.

Unit

Nominal Performance

Current-Sensing Range

IPR

–50

–

Sensitivity

Sens

IPR(min) < IP < IPR(max)

–

mV/A

Zero-Current Output Voltage

VIOUT(Q)

Bidirectional, IP = 0 A

–

VCC ×

0.5

–

Accuracy Performance

Total Output Error2

ETOT

IP = IPR(max), TA = 25°C to 150°C

–2

±0.8

IP = IPR(max), TA = –40°C to 25°C

–6

±4

Total Output Error Components3 ETOT = ESENS + 100 × VOE/(Sens × IP)

Sensitivity Error

Esens

IP = IPR(max), TA = 25°C to 150°C

–1.5

±0.8

1.5

IP = IPR(max), TA = –40°C to 25°C

–5.5

±4

5.5

Offset Voltage

VOE

IP = 0 A, TA = 25°C to 150°C

–10

±6

IP = 0 A, TA = –40°C to 25°C

–30

±6

Lifetime Drift Characteristics

Sensitivity Error Lifetime Drift

Esens_drift

–3

±1

Total Output Error Lifetime Drift

Etot_drift

–3

±1

Typical values with +/- are 3 sigma values

Percentage of IP, with IP = IPR(max).

A single part will not have both the maximum/minimum sensitivity error and maximum/minimum offset voltage, as that would violate the maximum/minimum total output

error specification. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

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