A1381 datasheet(5/19 Pages) ALLEGRO

Part #	A1381

Description	Programmable Linear Hall Effect Sensor ICs with Analog Output

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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Programmable Linear Hall Effect Sensor ICs with Analog Output

Available in a Miniature Thin Profile Surface Mount Package

A1381, A1382,

A1383, and A1384

5

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

ERROR COMPONENTS

Linearity Sensitivity Error

LinERR

–

±1.5

–

%

Symmetry Sensitivity Error

SymERR

–

±1.5

–

%

Ratiometry Quiescent Voltage

Output Error13

RatERRVOUT(Q)

–

±1.5

–

%

Ratiometry Sensitivity Error13

RatERRSens

–

±1.5

–

%

Ratiometry Clamp Error14

RatERRCLP

TA = 25°C

–

±1.5

–

%

DRIFT CHARACTERISTICS

Quiescent Voltage Output Drift

Through Temperature Range

∆VOUT(Q)

A1381

TA = 150°C

–

±60

mV

A1382

–

±50

mV

A1383

–

±40

mV

A1384

–

±40

mV

Sensitivity Drift Through

Temperature Range15

∆SensTC

–±3

–

%

Sensitivity Drift Due to Package

Hysteresis1

∆SensPKG

TA = 25°C; after temperature cycling

–

±2

–

%

1See Characteristic Definitions section.

2fC varies up to approximately ± 20% over the full operating ambient temperature range, TA, and process.

3Unit of measure (phase degrees) in reference to the magnetic input signal.

4Sens, VOUT(Q), VCLP(LOW), and VCLP(HIGH) scale with VCC due to ratiometry.

5Raw device characteristic values before any programming.

6Programmed at 150°C and calculated relative to 25°C.

7VOUT(Q)(max) is the value available with all programming fuses blown (maximum programming code set). The VOUT(Q) range is the total range from

VOUT(Q)init up to and including VOUT(Q)(max). See Characteristic Definitions section.

8Step size is larger than required, in order to provide for manufacturing spread. See Characteristic Definitions section.

9Non-ideal behavior in the programming DAC can cause the step size at each significant bit rollover code to be greater than twice the maximum

specified value of StepVOUT(Q), StepSENS, or StepTCSENS.

10Overall programming value accuracy. See Characteristic Definitions section.

11Sens(max) is the value available with all programming fuses blown (maximum programming code set). Sens range is the total range from Sensinit up

to and including Sens(max). See Characteristic Definitions section.

12Default polarity is for VOUT voltage to increase with a positive (south polarity) field applied to the branded face of the device.

13Percent change from actual value at VCC = 5 V, for a given temperature, over the guaranteed supply voltage operating range.

14Percent change from actual value at VCC = 5 V, TA = 25°C, over the guaranteed supply voltage operating range.

15Sensitivity drift from expected value at TA after programming TCSENS. See Characteristic Definitions section.

OPERATING CHARACTERISTICS (continued), valid over full operating temperature range,TA; CBYPASS= 0.1 μF, VCC = 5 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

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