ATS636LSE_12 Datasheet, PDF (1/15 Pages) Allegro MicroSystems – The ATS636LSE programmable, true power-on state (TPOS), device is optimized Hall-effect IC and rare-earth pellet combinations that switch in response to magnetic signals...

ATS636LSE
Programmable Back Biased Hall-Effect
Switch with TPOS Functionality
Features and Benefits
▪ Chopper Stabilization
▫ Extremely low switchpoint drift over temperature
▪ On-chip Protection
▫ Supply transient protection
▫ Output short-circuit protection
▫ Reverse-battery protection
▪ True Zero-Speed Operation
▪ True Power-On State
▪ Single-chip Sensing IC for High Reliability
▪ Optimized Magnetic Circuit
▪ Wide Operating Voltage Range
▪ Internal Regulator
Package: 4-pin SIP (suffix SE)
Description
The ATS636LSE programmable, true power-on state (TPOS),
device is optimized Hall-effect IC and rare-earth pellet
combinations that switch in response to magnetic signals
created by ferromagnetic targets in gear-tooth sensing and
proximity applications.
The device is externally programmable. A wide range of
programmability is available on the magnetic operate point
(B_OP) while the hysteresis remains fixed. This advanced
feature allows for optimization of the circuit switchpoint and
can drastically reduce the effects of mechanical placement
tolerances found in production environments .
A proprietary dynamic offset cancellation technique, with
an internal high-frequency clock, reduces the residual offset
voltage, which is normally caused by device overmolding,
temperature dependencies, and thermal stress. Having the Hall
element and amplifier in a single chip minimizes many problems
normally associated with low-level analog signals.
This device is ideal for use in gathering speed or position
information using gear-tooth-based configurations, or for
proximity sensing with ferromagnetic targets.
Not to scale
Continued on the next page…
Functional Block Diagram
Program / Lock
Programmming
Logic
Reg
Offset Adjust
AMP
S/H
LPF
Current
Limit
VCC
To all
subcircuits
OUT
Clock/Logic
635LSE-DS, Rev. 5
GND