A1160_16 Datasheet, PDF (4/13 Pages) Allegro MicroSystems – Chopper-Stabilized Precision Hall-Effect Switch With Advanced Diagnostics

A1160
Chopper-Stabilized Precision Hall-Effect Switch
With Advanced Diagnostics
OPERATING CHARACTERISTICS (continued): Valid across full operating voltage and ambient temperature ranges, unless
otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.¹
Max.
Unit²
Magnetic Characteristics⁷
Operate Point
Release Point
Hysteresis
Maximum External Field in Diagnostic
Mode⁸
B_OP
B_RP
B_HYS
B_OP – B_RP
B_EXT(DIAG)
115
180
245
G
60
125
190
G
30
55
80
G
800
10,000
–
G
Drift Detection Threshold
Operate Point Drift
B_OP(DRIFT)
30
–
420
G
Release Point Drift
B_RP(DRIFT)
15
–
325
G
1 _{Typical data is at TA = 25°C and VCC = 12 V and it is for design information only.}
2 _{1 G (gauss) = 0.1 mT (millitesla).}
3 _{Power-On Time, Output Rise Time, and Output Fall Time are ensured through device characterization and not final test.}
4 _{CL = oscilloscope probe capacitance.}
5 _{In Diagnostic mode the supply current level is different from the Normal mode operation current level. This is important when determining the power}
derating for Diagnostic mode.
6 _{When the A1160 passes the diagnostic tests, it outputs a 50% duty cycle signal. Any other output indicates the test failed. Please see the Diagnostic}
Mode of Operation section for more information.
7 _{Magnetic flux density, B, is indicated as a negative value for north-polarity magnetic fields, and as a positive value for south-polarity magnetic fields.}
8 _{800 G is the maximum test capability due to practical equipment limitations. Design simulations show that a 10,000 G external field will not adversely}
affect the A1160 in Diagnostic mode when a 1% sensitivity mismatch between the Hall elements in the IC is assumed.
Allegro MicroSystems, LLC
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com