A3250 Datasheet, PDF (2/15 Pages) Allegro MicroSystems – Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches

A3250 and A3251
Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches
Functional Block Diagram
VCC
Program/Lock
Programming
Logic
Offset Adjust
Regulator
Amp
Low-Pass
Filter
Current Limit
VOUT
GND
Hysteresis Curves
A3250
Hysteresis of ∆V_OUT
Switching Due to ∆B
V+
V_OUT(off)
A3251
Hysteresis of ∆V_OUT
Switching Due to ∆B
V+
V_OUT(off)
A3250-DS
V_OUT(on)(sat)
B+
V_OUT(on)(sat)
B+
B_HYS
B_HYS
Output voltage in relation to sensed magnetic flux density in a
south polarity magnetic field of sufficient strength. Transition
through B_OP must precede transition through B_RP.
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com