ACS70310 datasheet(7/27 Pages) ALLEGRO

7 / 27 page

Very High Precision, Programmable Linear Hall-Effect Sensor IC

with Reverse Battery Protection and High-Bandwidth (240 kHz)

Analog Output for Core-Based Current Sensing

ACS70310

Allegro MicroSystems

955 Perimeter Road

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

www.allegromicro.com

CHARACTERISTIC DEFINITIONS

Power-On Time (tPO)

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.

Power-On Time (tPO ) is defined as: the time it takes for the out-

put 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

Figure 4.

Temperature Compensation Power-On Time

(tTC)

After Power-On Time (tPO) elapses, tTC is also required before a

valid temperature compensated output.

Propagation Delay (tpd)

The time interval between a) when the applied magnetic field

reaches 20% of its final value, and b) when the output reaches

20% of its final value (see Figure 5).

Rise Time (tr)

The time interval between a) when the sensor IC reaches 10% of

its final value, and b) when it reaches 90% of its final value (see

Figure 2).

Response Time (tRESPONSE)

The time interval between a) when the applied magnetic field

reaches 90% of its final value, and b) when the sensor reaches

90% of its output corresponding to the applied magnetic field

(see Figure 6). The 90%-90% is also shown in the Electrical

Characteristics table and in the performance data.

Figure 4: Power-On Time Definition

Figure 5: Propagation Delay and Rise Time Definitions

Figure 6: Response Time Definition

VCC

VCC(min)

VOUT

90% VOUT

t1= time at which power supply reaches

minimum specified operating voltage

t2= time at which output voltage settles

within ±10% of its steady-state value

under an applied magnetic field

tPO

VCC(typ)

Applied Magnetic Field

Transducer Output

(%)

Propagation Delay, tpd

Rise Time, tr

Applied Magnetic Field

Transducer Output

(90%-90%)

(%)

Response Time, tRESPONSE

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