A1180 Просмотр технического описания (PDF) - Allegro MicroSystems

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A1180

Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches

Allegro MicroSystems 

A1180, A1181,

A1182, and A1183

Sensitive Two-Wire Field-Programmable

Chopper-Stabilized Unipolar Hall Effect Switches

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

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max. Units

Supply Voltage1

Supply Current2

Supply Zener Clamp Voltage

Supply Zener Clamp Current

VCC

ICC(L)

ICC(H)

VZ(supply)

Device powered on

B >BOP for A1180; B <BRP for A1181

B >BOP for A1182; B <BRP for A1183

B >BOP for A1181, A1183

B <BRP for A1180, A1182

ICC = ICC(L)(max) + 3 mA; TA = 25°C

IZ(supply) VZ(supply) = 28 V

3.5

–

24

V

2

–

5

mA

5

–

6.9

mA

12

–

17

mA

28

–

40

V

–

–

ICC(L)(max)

mA

+ 3 mA

Reverse Supply Current

Output Slew Rate3

IRCC

VRCC = –18 V

–

No bypass capacitor; capacitance of the

di/dt oscilloscope performing the measurement

–

= 20 pF

–

–1.6

mA

36

–

mA/μs

Chopping Frequency

fC

–

200

–

kHz

Power-On Time4

ton

After factory trimming; with and without

bypass capacitor (CBYP = 0.01 μF)

–

–

25

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 .

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

Characteristic

Programmable Operate Point Range

Initial Operate Point Range

Switchpoint Step Size2

Number of Programming Bits

Symbol

BOPrange

BOPinit

BRES

–

Test Conditions

ICC = ICC(H) for A1180 and A1182

ICC = ICC(L) for A1181 and A1183

VCC = 12 V

VCC = 5 V, TA = 25°C

Switchpoint setting

Programming locking

Min.

Typ.

Max. Units

60

–

200

G

–

33

60

G

4

8

12

G

–

5

–

Bit

–

1

–

Bit

Temperature Drift of BOP

∆BOP

–

–

±20

G

Hysteresis

BHYS BHYS = BOP – BRP

5

15

30

G

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.

Allegro MicroSystems, Inc.

3

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

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