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参数资料
| 型号： | A1642LKTN-I2-T |
| 元件分类： | 磁阻传感器 |
| 英文描述： | MAGNETIC FIELD SENSOR-HALL EFFECT, 3-100mT, RECTANGULAR, THROUGH HOLE MOUNT |
| 封装： | LEAD FREE, SIP-4 |
| 文件页数： | 1/13页 |
| 文件大小： | 326K |
| 代理商： | A1642LKTN-I2-T |
A1642LK
A1642LK-DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC ..........................................28 V
Reverse-Supply Voltage, VRCC ........................–18 V
Operating Temperature
Ambient, TA,...............................–40C to 150C
Maximum Junction, TJ(max)........................165C
Storage Temperature, TS ..................–65C to 170C
Running mode calibration for continu-
ous optimization
Single chip IC for high reliability
Internal current regulator for 2-wire
operation
Precise duty cycle signal over
operating temperature range
Large operating air gaps
Automatic Gain Control (AGC) for air
gap independent switchpoints
Automatic Offset Adjustment (AOA)
for signal processing optimization
True zero-speed operation
Undervoltage lockout
Wide operating voltage range
The A1642 is an optimized Hall effect sensing integrated circuit that provides a
user-friendly solution for true zero-speed digital ring-magnet sensing in two-wire
applications. This small package can be easily assembled and used in conjunction
with a wide variety of target 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
ring magnet poles. The circuitry contains a sophisticated digital circuit to reduce
system offsets, to calibrate the gain for air-gap–independent switchpoints, and to
achieve true zero-speed operation. Signal optimization occurs at power-on through
the combination of offset and gain adjust and is maintained throughout the operat-
ing time with the use of a running-mode calibration. The running-mode calibration
allows immunity to environmental effects such as micro-oscillations of the target
or sudden air gap changes.
The regulated current output is congured for two-wire applications and the
sensor is ideally suited for obtaining speed and duty cycle information in ABS
(antilock braking systems). The 1.5 mm spacing between the dual Hall elements is
optimized for ne pitch ring-magnet-based congurations. For applications requir-
ing sensing of rotating ferrous gears and targets, refer to the ATS642LSH series of
products. The package is lead (Pb) free, with 100% matte tin leadframe plating.
Two-Wire True Zero-Speed Miniature Differential
Peak-Detecting Sensor with Continuous Calibration
Package K, 4-pin SIP
Features and Benets
1. VCC
2. No connection
3. Test pin (oat or tie to GND)
4. GND
Use the following complete part numbers when ordering:
Part Number
Packing*
ICC Typical
A1642LK-I1-T
Bulk, 500 pieces/bag
6.0 Low to 14.0 High mA
A1642LKTN-I1-T
Tape and reel, 13-inch reel
4000 pieces/reel
A1642LK-I2-T
Bulk, 500 pieces/bag
7.0 Low to 14.0 High mA
A1642LKTN-I2-T
Tape and reel, 13-inch reel
4000 pieces/reel
*Contact Allegro for additional packing options.
1 2 3 4
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