Document
MT1401 Series
CMOS, Latch, Hall-Effect Magnetic Position Sensors
Features and Benefits
CMOS Technology Magnetic Type: Latch Wide Operating Voltage Range: Supply Voltage 3.0~18V
℃ ℃Specified Operating Temperature Range:
From –40 ~125 High Magnetic Sensitivity Bop=20Gauss, Brp=-20Gauss (typical) Lower Power Consumption Supply Current <3mA Lead Free Package Flat TO-92, SOT-23, SOT-89B High ESD Rating Open Drain Output Reversed Power Supply Protection
RoHS Compliant 2011/65/EU
Applications
Automotive, Home appliances, Industrial Electric Fan,Electric tools Brushless DC Motor Communication Magnetic Encoder Solid-State Switch Water Flow Sensor
Family Members
Part number MT1401A MT1401A-T MT1401AT MT1401BT MT1401ET
Description Flat TO-92 package, bulk packaging (1000pcs/bag) Flat TO-92 package, Radial lead, bulk packaging (1000pcs/bag) SOT-23 package, tape and reel packaging (3000pcs/bag) SOT-89B package, tape and reel packaging (1000pcs/bag) SOT-23(thin outline) package, tape and reel packaging (3000pcs/bag)
General Description
The MT1401 family, produced with CMOS technology, The Hall IC internally includes an on-chip Hall voltage generator, a voltage regulator for operation with supply voltages of 3.0 to 18V, temperature compensation circuitry, small-signal amplifier, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an open-drain output.
They are designed to respond to alternating North and South poles. While the magnetic flux density(B) is larger than operate point (Bop), the output will be turned on (Low), the output is held until the magnetic flux density(B) is lower than release point (Brp), then turn off (High).
The MT1401 family provides a variety of packages to customers: SOT-23/SOT-89B for surface mount and TO-92 flat for through-hole mount. All packages are RoHS compliant.
www.magntek.de Rev.8 12/2014
01/10
MT1401 Series
CMOS, Latch, Hall-Effect Magnetic Position Sensors
VS
Reference
Regulator
OSC
Dynamic offset cancellation
ESD ESD
Hall element
Output
ITA COMP
Stage
GND
Functional Block Diagram
VOUT
Function Description
Definition of Magnetic Parameters
BOP:
Operating Point Magnetic flux density applied on the branded side of the package which turns the output driver ON (VOUT = Low)
BRP:
Release Point Magnetic flux density applied on the branded side of the package which turns the output driver OFF (VOUT = high)
BHYST: Hysteresis Window BOP-BRP
Definition of Switching Function
Output (V)
Output (V)
North Pole BOP 0 BRP South Pole
Switching Behavior of AT
North Pole BRP 0 BOP South Pole
Switching Behavior of A, BT and ET
www.magntek.de Rev.8 12/2014
02/10
MT1401 Series
CMOS, Latch, Hall-Effect Magnetic Position Sensors
NS
OUT=Low
OUT=High
Switching Point of AT
Motion
SN
OUT=Low
OUT=High
Switching Point of A
SN
SN
Motion
OUT=Low
OUT=High
Switching Point of BT
Note:
Direction of magnetic flux
Pin Description
MT1401AT
Name Number
Vs 1
GND
3
Output 2
Description .