ATS622LSB Datasheet, PDF (1/12 Pages) Allegro MicroSystems – TRUE ZERO-SPEED HALL-EFFECT GEAR-TOOTH SENSOR

ATS622LSB
TRUE ZERO-SPEED
HALL-EFFECT GEAR-TOOTH SENSOR
1
2
3
4
Pin 1 = Supply
Pin 2 = Output
Pin 3 = No Connection
Pin 4 = Ground
Dwg. AH-006-6
ABSOLUTE MAXIMUM RATINGS
at T_A = 25°C
Supply Voltage, V_CC ........................ 26.5 V*
Reverse Supply Voltage, V_RCC ............ -24 V
Continuous Output Current, I_OUT ....... 20 mA
Reverse Output Current, I_ROUT .......... 50 mA
Package Power Dissipation,
P_D .......................................... See Graph
Operating Temperature Range,
T_A ............................. -40°C to +150°C*
Junction Temperature,
(continuous), T_J .......................... +165°C
(100 s), T_JM ................................ +180°C
Storage Temperature, T_S ................... +170°C
* Operation at increased supply voltages with
external circuitry is described in Applications
Information. Devices for operation at in-
creased temperatures are available on special
order.
The ATS622LSB is an optimized Hall-effect sensing integrated
circuit and magnet combination that provides a user-friendly solution
for true zero-speed digital gear-tooth sensing. The sensor module
consists of a plastic shell that holds together a samarium-cobalt magnet,
a pole piece, and a Hall-effect sensor that has been optimized to the
magnetic circuit. This small package can be easily assembled and used
in conjunction with a wide variety of gear shapes and sizes.
The integrated circuit incorporates a dual-element Hall-effect
sensor and signal processing that switches in response to differential
magnetic signals created by the ferrous gear teeth. The circuitry
contains a sophisticated digital circuit to eliminate magnet and system
offsets and to achieve true zero-speed operation (manufactured under
U.S. Pat. 5,917,320). A-to-D and D-to-A converters are used to adjust
the device gain at power on and to allow air-gap independent switching,
which greatly reduces vibration sensitivity of the device.
This sensor system is ideal for obtaining transmission and crank
information using gear-tooth-based configurations.
FEATURES AND BENEFITS
s Tight timing accuracy over temperature
s True zero-speed operation
s Air-gap independent switch points
s High vibration immunity
s Extremely precise duty cycle signal with temperature
s Large operating air gaps
s Defined power-on state
s Wide operating voltage range
s Digital output representing gear profile
s Single-chip sensing IC for high reliability
s Small mechanical size (9 mm diameter x 7 mm length)
s Optimized magnetic circuit
s <200 µs power-on time
s AGC and reference-adjust circuit
s Under-voltage lockout
Some restrictions may apply to certain types of sales.
Contact factory for details.
Always order by complete part number: ATS622LSB .