ALFA

Introduction

AH54y family consists of different Hall switches produced in BCDMOS technology. All Hall sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an output driver. The family consists of 2-wire devices, the corresponding output driver being an open-drain output transistor and a current source respectively. The comparator compares the actual magnetic flux with the fixed reference values (switching  points).  Accordingly  the  output  transistor  in  the  current  source  is  switched  on  (high  current consumption) or off (low current consumption) in 2-wire version. The active offset compensation leads to constant  magnetic  characteristics  over  supply  voltage  and  temperature  range.  In  addition,  the  magnetic parameters are robust against mechanical stress effects.

The sensors are designed for industrial and automotive applications and operate with supply voltages from3V to 30V in ambient temperature range from -40 °C up to 150 °C.

The family AH54y is available in SOT23-3L and the leaded version TO92S packages.

Features

 SOT23-3L and TO92S packages
 Low current consumptions of typ. 2.5 mA
 Operates from3V to 30 V supply voltage
 Overvoltage protection capability up to 40 V
 Highest ESD performance up to ±12 kV
 Current output for 2-wire applications
 Magnetic   characteristics   are   robust   regarding mechanical stress effects
 Constant  switching  points  over  a  wide  supply voltage and temperature range
 Wide operating temperature range from    -40 °C to 150 °C
 The decrease of magnetic flux density caused by rising   temperature   in   the   sensor   system   is compensated by a built-in negative temperature coefficient of the magnetic characteristics
 Reverse-voltage protection at Vcc pin
 Ideal sensor for applications in extreme automotive and industrial environments
 Qualified according to AEC-Q100 test standard for automotive  electronics industry to provide the highest quality expectation

Applications
 Speed and RPM sensing
 Tachometer, counter pickup
 Flow-rate sensing
 Brushless dc motor commutation
 Motor and fan control
 Robotics control
 Proximity sensor
 Position sensor
 Seat position detection
 Seat belt buckles
 Hood/trunk/door latches
 Sun roof/convertible top/tailgate/liftgate actuation
 Brake/clutch pedals
 Electric power steering (EPS)
 Transmissions and shift selectors
 Wiper motor 

Package

SOT23-3L             TO92

7.                         Data Sheet History                                                                    13

1.   AH54y Family Overview

The following definitions outline the device behavior for different switching points:

Latching Sensors:

2-wire: The output turns low with the magnetic south pole on the branded side of the package and turns high with the magnetic north pole on the branded side.

The output does not change if the magnetic field is removed. For changing the output state, the opposite magnetic field polarity must be applied.

Fig. 1: Definition of magnetic switching points for 3- wire latching sensor.

Introduction

AH50y family consists of different Hall switches produced in BCDMOS technology. All Hall sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an output driver. The family consists of 3-wire devices, the corresponding output driver being an open-drain output transistor and a current source respectively. The comparator compares the actual magnetic flux with the fixed reference values (switching points). Accordingly the output transistor is switched on or off in 3-wire version. The active offset compensation  leads  to  constant  magnetic  characteristics  over  supply  voltage  and  temperature  range.  In addition, the magnetic parameters are robust against mechanical stress effects.

The sensors are designed for industrial and automotive applications and operate with supply voltages from 2.7 V to 30V in ambient temperature range from -40 °C up to 150 °C.

The family AH50y is available in SOT23-3L and the leaded version TO92S packages.

Features

 SOT23-3L and TO92S packages
 Low current consumptions of typ. 2.5 mA
 Operates from 2.7 V to 30 V supply voltage
 Overvoltage protection capability up to 40 V
 Highest ESD performance up to ±12 kV
 Short-circuit   protected   open-drain   output   and thermal shut down for 3-wire applications
 Magnetic   characteristics   are   robust   regarding mechanical stress effects
 Constant  switching  points  over  a  wide  supply voltage and temperature range
 Wide operating temperature range from    -40 °C to 150 °C
 The decrease of magnetic flux density caused by rising   temperature   in   the   sensor   system   is compensated by a built-in negative temperature coefficient of the magnetic characteristics
 Reverse-voltage protection at Vcc pin
 Ideal sensor for applications in extreme automotive and industrial environments
 Qualified according to AEC-Q100 test standard for automotive  electronics  industry  to  provide  the highest quality expectation
 
Applications

 Speed and RPM sensing
 Tachometer, counter pickup
 Flow-rate sensing
 Brushless dc motor commutation
 Motor and fan control
 Robotics control
 Proximity sensor
 Position sensor
 Seat position detection
 Seat belt buckles
 Hood/trunk/door latches
 Sun roof/convertible top/tailgate/liftgate actuation
 Brake/clutch pedals
 Electric power steering (EPS)
 Transmissions and shift selectors
 Wiper motor

Package

SOT23-3L          TO92

Contents

Section
 

Title
 

Page
 

SECTION        Title                                         Page
1.              AH50y Family Overview                     3
2.             Ordering Information                          5 
2.1            Marking Code                                    6
2.2    Operating Ambient Temperature Range       6
2.3    Hall Sensor Package Codes                        6
3.      Functional Description                               6
4.      Diagnostic Features                                   7
5.      Specifications                                            8
5.1     Outline Dimensions                                    8
5.2     Pin assignment                                         10
5.3     Absolute Maximum Ratings                        10
5.4     ESD and Latch-up                                     11
5.5     Recommended Operating Conditions           11
5.6     Characteristics                                          12
5.7     Magnetic Characteristics Overview              13
6.      Magnetoelecric conversion characteristics    13
7.      Application circui                                        14
8.      Data Sheet History                                      15
 

1.   AH5xy Family Overview

Introduction

AH431, designed with Bipolar technology, includes on-chip Hall element voltage generator, a voltage regulator  for  operation  with  supply  voltages  of  3.8  to  60V,  temperature  compensation  circuitry, small-signal amplifier, Schmitt trigger and a switch controlled current source circuit.

The sensor is a 2-wire device designed to respond to South poles , the    output driver being    a current

source. The comparator compares the actual magnetic flux with the fixed reference values (switching points). The current source is switched on (high current consumption) or off (low current consumption) . The active offset compensation leads to constant magnetic characteristics over supply voltage and temperature range.

AH431 offers a variety of packages, including TO-92S, SOT-23. All packages are RoHS compliant.

Features
Digital current output

Miniature construction

High sensitivity of   85/60Gauss   (typ.)

Wide voltage range of 3.8 Vdc to 60 Vdc

Highest ESD performance up to ±6 kV

Temperature range of -40 °C to 125 °C

Applications
BLDC Motor Commutation

Flow sensor

Position sensor

Speed sensor

Proximity sensor

Package

1.Introduction

AH422, unipolar Hall effect switch, designed with Bipolar technology, is south sensitive unipolar Hall Effective switch and includes on-chip Hall element voltage generator, a voltage regulator for operation with supply voltages of 3.5 to 40V, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an open-collector output.

The sensor is designed to respond to South poles. While the magnetic flux density(B) is larger than operate point Bop,   the output will be turned on with low output level. Then the output is held until the magnetic flux (B) is lower than release point Brp. The output will be turned off with high output level.

AH422 offers a variety of packages, including TO-92, SOT-23. All packages are RoHS compliant.
 

2.Features
Miniature construction

High sensitivity of 30/20Gauss   (typ.)

Wide voltage range of 3.5 Vdc to 40 Vdc

Temperature range of -40 °C to125 °C

Highest ESD performance up to ±4 kV

Open Collector Output

3.Applications
BLDC Motor Commutation

Flow sensor

Position sensor

Speed sensor

Proximity sensor

4.Package

5.Ordering information

1.Introduction

AH421, unipolar Hall effect switch, designed with Bipolar technology, is south sensitive unipolar Hall Effective switch and includes on-chip Hall element voltage generator, a voltage regulator for operation with supply voltages of 3.5 to 40V, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an open-collector output.

The sensor is designed to respond to South poles. While the magnetic flux density(B) is larger than operate point Bop,   the output will be turned on with low output level. Then the output is held until the magnetic flux (B) is lower than release point Brp. The output will be turned off with high output level.

AH421 offers a variety of packages, including TO-92, SOT-23. All packages are RoHS compliant
 

2.Features
 Miniature construction

 High sensitivity of 60/40 Gauss   (typ.)

 Wide voltage range of 3.5 Vdc to 40 Vdc

 Temperature range of -40 °C to 125 °C

 Highest ESD performance up to ±4 kV

 Open Collector Output

3. Applications
 BLDC Motor Commutation

 Flow sensor

 Position sensor

 Speed sensor

 Proximity sensor
4.Package

5.Ordering information

1. Introduction

AH402H  Hall-Effect  bipolar  sensor,  employed  with  high  voltage  bipolar  technology,  has  been  designed purposely for automotive and industrial applications, and operates with supply voltages from 3.0 V to 60 V in temperature range from -40 °C up to 150 °C. AH402H is available in SMD-package SOT23 and in the leaded version TO92UA.

2. Features

– Operates from 3.0V to 60 V supply voltage

– Overvoltage protection capability up to 80 V – Highest ESD performance up to ±4 kV

– Short-circuit protected open-drain output

– Wide   temperature range from   -40 °C to 150 °C – Reverse-voltage protection at VSUP pin

– Ideal sensor for applications in extreme automotive and industrial environments – Tiny SOT23 (-SU) package and TO92 (-UA )package

3. Potential Applications

– Brushless DC motor commutation – Speed measurement

– Revolution counting

– Angular position detection – Proximity detection

4. Block Diagram

The circuit includes temperature compensated voltage regular, Hall plate, signal amplifier and Schmitt-Trigger in single silicon chip. The regulated voltage provides the reference voltage for the hall plate. A magnetic field perpendicular to the sensor surface generates a hall voltage, which is amplified and then sent to a Schmitt trigger. A protection diode against reverse power supply is integrated.

5. Pin Description

   TO92S                                               SOT23

10. Temperature characteristic

                 AH402H At Vcc=5V,Magnetic characteristics vs.Temperature

1. Introduction

AH402F  Hall-Effect  bipolar  sensor,  employed  with  high  voltage  bipolar  technology,  has  been  designed purposely for automotive and industrial applications, and operates with supply voltages from 3.0 V to 60 V in temperature range from -40 °C up to 150 °C. AH402F is available in SMD-package SOT23 and in the leaded version TO92S.

2. Features

– Operates from 3.0 V to 60 V supply voltage

– Overvoltage protection capability up to 80 V – Highest ESD performance up to ±4kV

– Short-circuit protected open-drain output

– Wide   temperature range from   -40 °C to 150 °C

– Ideal sensor for applications in extreme automotive and industrial environments – Tiny SOT23 package and TO92S package

3. Potential Applications

– Brushless DC motor commutation – Speed measurement

– Revolution counting

– Angular position detection – Proximity detection

4. Block Diagram

              The circuit includes temperature compensated voltage regular, Hall plate, signal amplifier and hysteresis comparator in single silicon chip. The regulated voltage provides the reference voltage for the hall plate.                A magnetic field perpendicular to the sensor surface generates a hall voltage, which is amplified and then sent to a hysteresis comparator.

5.  Pin Description

  TO92S                                        SOT32

6. Ordering information

1. Introduction

AH401F  Hall-Effect  bipolar  sensor,  employed  with  high  voltage  bipolar  technology,  has  been  designed purposely for automotive and industrial applications, and operates with supply voltages from 3.0 V to 60 V in temperature range from -40 °C up to 150 °C. AH401F is available in SMD-package SOT23 and in the leaded version TO92UA.

2. Features

– Operates from 3.0 V to 60 V supply voltage
– Overvoltage protection capability up to 80 V – Highest ESD performance up to ±4 kV
– Short-circuit protected open-drain output
– Wide   temperature range from   -40 °C to 150 °C – Reverse-voltage protection at VSUP pin
– Ideal sensor for applications in extreme automotive and industrial environments – Tiny SOT23 (-SU) package and TO92 (-UA )package

3. Potential Applications

– Brushless DC motor commutation – Speed measurement
– Revolution counting
– Angular position detection – Proximity detection

4. Block Diagram

The circuit includes temperature compensated voltage regular, Hall plate, signal amplifier and Schmitt-Trigger in single silicon chip. The regulated voltage provides the reference voltage for the hall plate. A magnetic field perpendicular to the sensor surface generates a hall voltage, which is amplified and then sent to a Schmitt trigger. A protection diode against reverse power supply is integrated.

5. Pin Description

6. Ordering information

Introduction

AH401, designed with Bipolar technology, includes on-chip Hall element voltage generator, a voltage regulator for operation with supply voltages of 3.8 to 60V, reverse voltage protection, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an open-collector output.

The sensor is designed to respond to North and South poles. While the magnetic flux density(B) is larger than operate point Bop, the output will be turned on with low output level. Then the output is held until the magnetic flux (B) is lower than release point Brp. The output will be turned off with high output level.

AH401 offers a variety of packages, including TO-92, SOT-23. All packages are RoHS compliant.

Features
 Miniature construction

 High sensitivity of +/-55 Gauss (typ.)

 Wide voltage range of 3.8 Vdc to 60 Vdc

 Temperature range of -40 °C to 150 °C

 Highest ESD performance up to ±4 kV

 Open Collector Output

Applications
 BLDC Motor Commutation

 Flow sensor

 Position sensor

 Speed sensor

 Proximity sensor

Function  diagram

AH401, designed with Bipolar technology, includes on-chip Hall element voltage generator, a voltage regulator for operation with supply voltages of 3.8 to 60V, reverse voltage protection, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an open-collector output.

Introduction

AH469 is designed and produced using CMOS technology. It is a bipolar Hall switch chip with low power consumption and high sensitivity. The device integrates a voltage regulator, a Hall voltage generator, a small signal amplifier, a chopper regulator, and schmitt-trigger and push-pull output. The sensor has the characteristics of good temperature stability, strong stress resistance and high sensitivity, and its operating voltage is 2.7-5.5V.

AH469 provides TO-92S in-line package and SOT23-3L package. Both packages meet ROHS

environmental protection standards.

Features
 Micro-power battery-powered applications

 Highest ESD performance up to ±6kV

 Omnipolar output switch

 Push-pull output

 Operating voltage 2.7-5.5V

Application
 Solid state switch

 Cordless mobile phone reminder switch

 Flip phone screen saver switch

 Proximity switch

 Magnetic sensor switch with low duty cycle instead of reed
 Level gauge
Package

            

Introduction

AH468 is designed and produced using CMOS technology. It is a bipolar Hall switch chip with low power consumption and high sensitivity. The device integrates a voltage regulator, a Hall voltage generator, a small signal amplifier, a chopper regulator, and schmitt-trigger and push-pull output. The sensor has the characteristics of good temperature stability, strong stress resistance and high sensitivity, and its operating voltage is 2.7-5.5V.

AH468 provides TO-92S in-line package and SOT23-3L package. Both packages meet ROHS

environmental protection standards.
 
Features
 Micro-power battery-powered applications

 Highest ESD performance up to ±6kV

 Omnipolar output switch

 Push-pull output

 Operating voltage 2.7-5.5V
 
Application
 Solid state switch

 Cordless mobile phone reminder switch

 Flip phone screen saver switch

 Proximity switch

 Magnetic sensor switch with low duty cycle instead of reed
 Level gauge
Package

Function diagram

Pin Description

TO92S                        SOT32

Introduction

AH466 is designed and produced using CMOS technology. It is a south pole and north pole sensitive low-power omnipolar  Hall  effect switch.  The  device  integrates  a  voltage  regulator,  a  Hall  voltage generator, a small signal amplifier, a chopper regulator, and schmitt-trigger and push-pull output. The sensor has the characteristics of good temperature stability, strong stress resistance and high sensitivity, and its operating voltage is 2.5-5.5V.

AH466 provides TO-92S in-line package and SOT23-3L package. Both packages meet ROHS

environmental protection standards.
 
Features
 Micro-power battery-powered applications
 Highest ESD performance up to ±6kV

    Omnipolar output switch

 Push-pull output

 Operating voltage 2.5-5.5V
 
Application
 Solid state switch

 Cordless mobile phone reminder switch

 Flip phone screen saver switch

 Proximity switch

 Magnetic sensor switch with low duty cycle instead of reed

    Level gauge

Package

Function diagram

Pin Description

    TO92S                            SOT32

Introduction

AH464 is designed and produced using CMOS technology. It is a south pole and north pole sensitive low-power omnipolar  Hall  effect switch.  The  device  integrates  a  voltage  regulator,  a  Hall  voltage generator, a small signal amplifier, a chopper regulator, and schmitt-trigger and push-pull output. The sensor has the characteristics of good temperature stability, strong stress resistance and high sensitivity, and its operating voltage is 2.5-5.5V.

AH464 provides TO-92S in-line package and SOT23-3L package. Both packages meet RoHS

environmental protection standards

Features

 Micro-power battery-powered applications

 Highest ESD performance up to ±6kV

 Omnipolar output switch

 Push-pull output

 Operating voltage 2.5-5.5V

Application
 Solid state switch

 Cordless mobile phone reminder switch

 Flip phone screen saver switch

 Proximity switch

 Magnetic sensor switch with low duty cycle instead of reed
 Level gauge

Package

Pin Description

                     

Introduction

AH463 is designed and produced using CMOS technology. It is a south pole and north pole sensitive low-power omnipolar  Hall  effect switch.  The  device  integrates  a  voltage  regulator,  a  Hall  voltage generator, a small signal amplifier, a chopper regulator, and schmitt-trigger and push-pull output. The sensor has the characteristics of good temperature stability, strong stress resistance and high sensitivity, and its operating voltage is 2.5-5.5V.

AH463 provides TO-92S in-line package and SOT23-3L package. Both packages meet RoHS

environmental protection standards.

Features

Micro-power battery-powered applications

Highest ESD performance up to ±6kV

Omnipolar output switch

Push-pull output

Operating voltage 2.5-5.5V

Application

Solid state switch

Cordless mobile phone reminder switch

Flip phone screen saver switch

Proximity switch

Magnetic sensor switch with low duty cycle instead of reed

Package

Ordering Information

Limit parameters

The limit parameter is the limit value when the chip is applied. Exceeding the limit value may damage the chip. Although the function of the chip is not necessarily damaged when the limit parameter is exceeded, if the limit value is exceeded within a certain period of time, the reliability of the chip may be affected.

Electrical and magnetic characteristics（Ta =25˚C，VDD = 3V）

Function diagram

Pin Description

   TO92S                                      SOT32

High sensitivity omnipolar Hall sensor

1.Introduction

AH452 is an omnipolar Hall-effect switch designed and produced based on a bipolar semiconductor (Bipolar) process and is sensitive to the south and north poles. The device integrates a voltage generator that can work stably under a power supply voltage of 3.5 to 40V,temperature compensation circuit, small signal amplifier, Schmitt trigger and open collector output.

               The sensor can work in the South and North Pole. When the magnetic flux density (B) is greater than the operating point Bop, the output will be turned on at a low output level. Then keep the output until the                   magnetic flux (B) is lower than the release point Brp. The output will be turned off at a high output level.

               AH452 provides TO-92S package and SOT-23 package. Both packages meet the RoHS environmental protection standard.

               2.Features

               Micro structure

               Sensitivity +/-50/30Gauss (typical value）

                 Operating voltage range from 3.5 Vdc to 40 Vdc
              Operating temperature range -40 °C -125°C

              Highest ESD performance up to ±5 kV

              open collector output

                3.Application

                  Docking detection

               Door lock opening and closing detection

               Proximity sensing

               Valve positioning Pulse countin

                 4.Package

                7.Absolute Maximum Ratings
                  The absolute maximum value is the limiting value when the chip is applied, above which the chip can be damaged. Although the function of the chip is not necessarily damaged when the absolute maximum                      value is exceeded, the reliability of the chip may be affected if the absolute maximum value is exceeded for a certain time.

High sensitivity omnipolar Hall sensor

1.Introduction

AH451 is an omnipolar Hall-effect switch designed and produced based on a bipolar semiconductor (Bipolar) process and is sensitive to the south and north poles. The device integrates a voltage generator that can work stably under a power supply voltage of 3.5 to 60V, temperature compensation circuit, small signal amplifier, Schmitt trigger and open collector output.

          The sensor can work in the South and North Pole. When the magnetic flux density (B) is greater than the operating point Bop, the output will be turned on at a low            output level. Then keep the output until the magnetic flux (B) is lower than the release point Brp. The output will be turned off at a high output level.

          AH451  provides  TO-92S  package  and  SOT-23  package.  Both  packages  meet  the  RoHS environmental protection standard.

2.Features

                  Micro structure

               Sensitivity +/-80/50Gauss (typical value)

               Operating voltage range from 3.5 Vdc to 40Vdc

               Operating temperature range -40 °C -125°C

               Highest ESD performance up to ±5 kV

               open collector output

               3.Application

                 Docking detection

              Door lock opening and closing detection

              Proximity sensing

              Valve positioning Pulse countin

               4.Package

               5.Ordering information

               6.Pin assignment

7.Absolute Maximum Ratings

                  The absolute maximum value is the limiting value when the chip is applied, above which the chip can be damaged. Although the function of the chip is not                        necessarily damaged when the absolute maximum value is exceeded, the reliability of the chip may be affected if the absolute maximum value is exceeded                        for a certain time.

8.Electrical and magnetic characteristics(Ta=25˚C, VDD =5.0V)