ATS635LSE Datasheet, PDF (1/15 Pages) Allegro MicroSystems – Programmable Back Biased Hall-Effect Switch with TPOS Functionality

ATS635LSE and ATS636LSE
PACKAGE DIAGRAM
Pin 1 = VCC
Pin 2 = VOUT
Pin 3 = No Connect
Pin 4 = GND
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V_CC………………….…….. 28 V*
Reverse Supply Voltage, V_RCC…………… -18 V
Overvoltage Supply Current, I_CC…..……100 mA
Output
Output
OSifnf _{kVColutarrgeen,tV, IOOUUTT……….…..…………………….…202m6.5AVâ€} 
Magnetic Flux Density, B…………… Unlimited
Package Power Dissipation, P_D….. See Graph
Operating Temperature Range, T_A
Suffix “L”………...……….. -40 °C to +150 °C
Junction Temperature, T_J……..…………..165 °C
Storage Temperature Range
T_S ………………………… -65 °C to +170 °C
*Fault conditions that produce supply voltage transients will
be clamped by an internal Zener diode. These conditions
can be tolerated but should be avoided.
† _{Internal current limiting is intended to protect the device}
from output short circuits, but is not intended for continuous
operation.
Programmable Back Biased Hall-Effect
Switch with TPOS Functionality
The ATS635LSE and ATS636LSE programmable, true power-on state
(TPOS), sensors are an optimized Hall-effect IC and magnet combination
that switch in response to magnetic signals created by ferrous targets in
gear-tooth sensing and proximity applications.
The devices are externally programmable. A wide range of
programmability is available on the magnetic operate point (BOP) while the
hysteresis remains fixed. This advanced feature allows for optimization of
the sensor switch point 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 sensor system is ideal for use in gathering speed or position
information using gear-tooth-based configurations, or for proximity sensing
with ferrous targets.
The ATS635LSE switches HIGH in the presence of a ferrous target or
tooth and switches LOW in the presence of a target valley, window, or
when the ferrous target is removed. The ATS636LSE has the opposite
polarity and switches LOW in the presence of a ferrous target or tooth and
switches HIGH in the presence of a target valley, window, or when the
ferrous target is removed.
These devices are available in lead (Pb) free versions, with 100%
matte tin leadframe plating.
FEATURES
Chopper Stabilization
Extremely low switch-point 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
Use the following complete part numbers when ordering:
Part Number
Pb-Free Output
(Tooth)
Packing*
ATS635LSETN-T Yes
High
13-in. reel, 450 pieces/reel
ATS636LSETN-T Yes
Low
13-in. reel, 450 pieces/reel
*Contact Allegro for additional packing options.
ATS635LSE-DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com