ACS70331 datasheet(7/26 Pages) ALLEGRO

7 / 26 page

High Sensitivity, 1 MHz, GMR-Based Current Sensor IC

in Space-Saving, Low Resistance QFN and SOIC-8 Packages

ACS70331

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ACS70331EESA-2P5U3 PERFORMANCE CHARACTERISTICS

: Valid over full range of TA, and VCC = 3.3 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ. [1]

Max.

Unit

NOMINAL PERFORMANCE [2]

Current Sensing Range

IPR

–

2.5

Sensitivity

Sens

IPR(min) < IP < IPR(max)

–

800

–

mV/A

Zero Current Output Voltage

VIOUT(Q)

IP = 0 mA, TA = 25°C

–

0.25

–

ACCURACY PERFORMANCE

Total Output Error[3]

ETOT

Measured at IP = IPR(max), TA = 25°C

–

±2

–

Measured at IP = IPR(max), TA = –40°C to 85°C

–

±5

–

TOTAL OUTPUT ERROR COMPONENTS [4][5] ETOT = ESENS + 100 × VOE/(Sens × IP)

Sensitivity Error

Esens

Measured at IP = IPR(max), TA = 25°C

–

±1.5

–

Measured at IP = IPR(max), TA = –40°C to 85°C

–

±3

–

Offset Voltage

VOE

IP = 0 A, TA = 25°C

–

±15

–

IP = 0 A, TA = –40°C to 85°C

–

±55

–

[1]

Typical values with +/- are 3 sigma values.

[2]

See Ideal Output Transfer Curve section.

[3]

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

[4]

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.

[5]

See Lifetime Drift section for accuracy drift under different application temperatures, currents, and fields.

ACS70331EESA-2P5B3 PERFORMANCE CHARACTERISTICS

: Valid over full range of TA, and VCC = 3.3 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ. [1]

Max.

Unit

NOMINAL PERFORMANCE [2]

Current Sensing Range

IPR

–2.5

–

2.5

Sensitivity

Sens

IPR(min) < IP < IPR(max)

–

400

–

mV/A

Zero Current Output Voltage

VIOUT(Q)

IP = 0 mA, TA = 25°C

–

1.5

–

ACCURACY PERFORMANCE

Total Output Error[3]

ETOT

Measured at IP = IPR(max), TA = 25°C

–

±2

–

Measured at IP = IPR(max), TA = –40°C to 85°C

–

±3

–

TOTAL OUTPUT ERROR COMPONENTS [4][5] ETOT = ESENS + 100 × VOE/(Sens × IP)

Sensitivity Error

Esens

Measured at IP = IPR(max), TA = 25°C

–

±1.5

–

Measured at IP = IPR(max), TA = –40°C to 85°C

–

±3

–

Offset Voltage

VOE

IP = 0 A, TA = 25°C

–

±10

–

IP = 0 A, TA = –40°C to 85°C

–

±40

–

[1]

Typical values with +/- are 3 sigma values.

[2]

See Ideal Output Transfer Curve section.

[3]

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

[4]

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.

[5]

See Lifetime Drift section for accuracy drift under different application temperatures, currents, and fields.

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