ACS711ELCTR-25AB-T View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

MFG CO.

ACS711ELCTR-25AB-T

Hall Effect Linear Current Sensor with Overcurrent Fault Output for <100 V Isolation Applications

Allegro MicroSystems 

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ACS711

Hall Effect Linear Current Sensor with Overcurrent

Fault Output for < 100 V Isolation Applications

Definitions of Dynamic Response Characteristics

Power-On Time (tPO). When the supply is ramped to its operat-

ing voltage, the device requires a finite time to power its internal

components before responding to an input magnetic field.

Power-On Time, tPO , is defined as the time it takes for the output

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

applied magnetic field, after the power supply has reached its

minimum specified operating voltage, VCC(min), as shown in the

chart at right.

Rise time (tr). The time interval between a) when the sensor

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 of the current sensor, in which ƒ(–3 dB) =

0.35 / tr. Both tr and tRESPONSE are detrimentally affected by eddy

current losses observed in the conductive IC ground plane.

I (%)

90

10

0

Primary Current

Transducer Output

t

Rise Time, tr

Allegro MicroSystems, LLC

14

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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