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A1171

Micropower Ultrasensitive Hall Ef fect Switch

Allegro MicroSystems 

A1171

Micropower Ultrasensitive Hall Effect Switch

ELECTRICAL CHARACTERISTICS valid over operating voltage and temperature range (unless otherwise specified)

Characteristic

Symbol

Test Conditions

Min. Typ.1 Max. Units

Supply Voltage Range2

VDD

Operating, TA= 25°C

Operating, over full ambient temperature range

1.65

–

3.5

V

1.8

Output Voltage

Period

Chopping Frequency

Supply Slew Rate3

VOUT(SAT)

VOUT(HIGH)

tPERIOD

fC

SR

NMOS on, ISINK = 1 mA, VDD = 2.75 V

PMOS on, ISOURCE = –1 mA, VDD = 2.75 V

–

100

300

VDD–300 VDD–100

–

–

50

100

–

200

–

20

–

–

mV

mV

ms

kHz

V/ms

IDD(EN) Device in awake mode (enabled)

–

–

2.0

mA

Supply Current

SELECT Current4

SELECT Voltage4

IDD(DIS) Device in sleep mode (disabled)

IDD(AV)

VDD = 1.8 V, TA = 25°C

VDD = 3.5 V, TA = 25°C

ISELECT

VSELECT(LOW)

VSELECT(HIGH)

–

–

8.0

μA

–

3.5

8

μA

–

7.1

12

μA

0

1

2

μA

0

–

1/3VDD

V

2/3VDD

–

VDD

V

1Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions, such as TA = 25°C. Performance

may vary for individual units, within the specified maximum and minimum limits.

2Operate points, BOPX, and release points, BRPX, vary with supply voltage.

3If SR < SR(min), then valid device output might be delayed for one Period, tPERIOD , of device.

4Maximum VDD, minimum 0 V.

MAGNETIC CHARACTERISTICS valid at 1.8 V ≤ VDD ≤ 3.5 V and TA = 25°C

Characteristic

Symbol

Test Conditions

Min. Typ.1 Max. Units2

Operate Point3

BOPS

BOPN

–

32

55

G

–55

–32

–

G

Release Point3

BRPS

BRPN

6

26

–

G

–

–26

–6

G

Hysteresis

BHYS

|BOPX - BRPX|

–

6

–

G

1Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions, such as TA = 25°C. Performance

may vary for individual units, within the specified maximum and minimum limits.

21 gauss (G) is exactly equal to 0.1 millitesla (mT).

3Operate points, BOPX, and release points, BRPX, vary with supply voltage.

Allegro MicroSystems, LLC

3

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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