A1180 datasheet(3/15 Pages) ALLEGRO

3 / 15 page

Sensitive Two-Wire Field-Programmable

Chopper-Stabilized Unipolar Hall Effect Switches

A1180, A1181,

A1182, and A1183

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

MAGNETIC CHARACTERISTICS1 over the operating voltage and temperature range, unless otherwise speciﬁed

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Programmable Operate Point Range

BOPrange

ICC = ICC(H) for A1180 and A1182

ICC = ICC(L) for A1181 and A1183

–

200

Initial Operate Point Range

BOPinit

VCC = 12 V

–

Switchpoint Step Size2

BRES

VCC = 5 V, TA = 25°C

Number of Programming Bits

–

Switchpoint setting

–

Bit

Programming locking

–

Bit

Temperature Drift of BOP

∆BOP

–

±20

Hysteresis

BHYS

BHYS = BOP – BRP

515

1Relative values of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic

polarity; therefore greater B values indicate a stronger south polarity ﬁeld (or a weaker north polarity ﬁeld, if present).

2The range of values speciﬁed for BRES is a maximum, derived from the cumulative programming bit errors.

ELECTRICAL CHARACTERISTICS over the operating voltage and temperature range, unless otherwise speciﬁed

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Supply Voltage1

VCC

Device powered on

3.5

–

Supply Current2

ICC(L)

B >BOP for A1180; B <BRP for A1181

–

B >BOP for A1182; B <BRP for A1183

–

6.9

ICC(H)

B >BOP for A1181, A1183

B <BRP for A1180, A1182

–

Supply Zener Clamp Voltage

VZ(supply)

ICC = ICC(L)(max) + 3 mA; TA = 25°C

–

Supply Zener Clamp Current

IZ(supply)

VZ(supply) = 28 V

–

ICC(L)(max)

+ 3 mA

Reverse Supply Current

IRCC

VRCC = –18 V

–

–1.6

Output Slew Rate3

di/dt

No bypass capacitor; capacitance of the

oscilloscope performing the measurement

= 20 pF

–

mA/μs

Chopping Frequency

–

200

–

kHz

Power-On Time4

ton

After factory trimming; with and without

bypass capacitor (CBYP = 0.01 μF)

––

μs

Power-On State5,6

POS

ton ≤ ton(max); VCC slew rate ≥ 25 mV/μs

–

HIGH

–

1VCC represents the generated voltage between the VCC pin and the GND pin.

2Relative values of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic

polarity; therefore greater B values indicate a stronger south polarity ﬁeld (or a weaker north polarity ﬁeld, if present).

3Measured without bypass capacitor between VCC and GND. Use of a bypass capacitor results in slower current change.

4Measured with and without bypass capacitor of 0.01 μF. Adding a larger bypass capacitor causes longer Power-On Time.

5POS is deﬁned as true only with a VCC slew rate of 25 mV/μs or greater. Operation with a VCC slew rate less than 25 mV/μs can permanently harm

device performance.

6POS is undeﬁned for t > ton or BRP < B < BOP.

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