ATS645 Allegro MicroSystems, Inc., ATS645 Datasheet - Page 2

• Manufacturer Part Number: ATS645
• Description: Ats645lsh True Zero Speed Miniature Gear-tooth Sensors
• Manufacturer: Allegro MicroSystems, Inc.

ATS645LSH
Features and Benefits (continued)
• Automatic Offset Adjustment (AOA)
• True zero-speed operation
• Undervoltage lockout
• Wide operating voltage range
• Defined power-on state
Absolute Maximum Ratings
Supply Voltage
Reverse-Supply Voltage
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
1
a. Certain variants cited in this footnote are in production but have been determined to be LAST TIME BUY. This classification indicates that sale
of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because
obsolescence in the near future is probable. Samples are no longer available. Status change: October 31, 2006. Deadline for receipt of LAST
TIME BUY ORDERS: April 27, 2007. These variants include:
b.
classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be
purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available.
Status change: May 1, 2006. These variants include: ATS645LSHTN-I2.
2
3
Pb-based variants are being phased out of the product line.
Contact Allegro for additional packing options.
Some restrictions may apply to certain types of sales. Contact Allegro for details.
Pin-out Diagram
ATS645LSHTN-I1-T
ATS645LSHTN-I2-T
Certain variants cited in this footnote are in production but have been determined to be NOT FOR NEW DESIGN. This
Part Number
1
2
3
Characteristic
4
Pb-free
Yes
Yes
1
Symbol
T
Terminal List
V
J
Tape and Reel 13-in. 800 pcs./reel
Tape and Reel 13-in. 800 pcs./reel
V
(max)
T
True Zero Speed Miniature Differential Peak-
RCC
T
Name
TEST
CC
stg
GND
VCC
A
NC
ATS645LSHTN-I1.
Range L
Packing
Connects power supply to chip
No connection
For Allegro use, fl oat or tie to GND
Ground terminal
2
Description (continued)
The integrated circuit incorporates a dual-element Hall effect sensor
as well as signal processing that switches the output state in response
to changes in the magnetic gradients created by ferrous gear teeth.
The circuitry contains a sophisticated digital circuit to eliminate
magnet and system offsets and to achieve true zero speed operation
(U.S. Patent 5,917,320). A-D and D-A converters are used to adjust
the device gain at power-on and to allow switching independent of
the breadth of the air gap.
The regulated current output is configured for two wire applications,
requiring one less wire for operation than do switches with the more
traditional open-collector output.The package is available in a lead
(Pb) free version, with 100% matte tin leadframe plating.
Notes
Description
Detecting Gear Tooth Sensor
6.0 Low to 14.0 High mA
7.0 Low to 14.0 High mA
I
CC
Typical
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
–40 to 150
–65 to 170
Rating
–18
165
28
Number
1
2
3
4
Units
ºC
ºC
ºC
V
–
2