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
|
Part number |
Package |
Packing |
Ambient, TA |
|
AH422UA |
TO92S |
Bulk, 1000 pieces/bag |
-40℃ to 125℃ |
|
AH422SU |
SOT23 |
Tape&Reel, 3000 pieces/reel |
-40℃ to 125℃ |
|
Pin number |
Name |
Function |
|
1 |
VDD |
Power supply |
|
2 |
GND |
Ground |
|
3 |
Vout |
Output |
|
Parameter |
Symbol |
Value |
Units |
|
Supply voltage |
VDD |
60 |
V |
|
Reverse voltage |
VDD |
-0.3 |
V |
|
Output Sink Current |
Isink |
40 |
mA |
|
Output Voltage |
Vout |
60 |
V |
|
Operating temperature range |
Ta |
-40~125 |
℃ |
|
Storage temperature range |
Ts |
-40~165 |
℃ |
|
Parameter |
Symbol |
Test Conditions |
Min |
Typ |
Max |
Units |
|
Electrical characteristics |
||||||
|
VDD |
Operating voltage |
|
3.5 |
|
40 |
V |
|
IDD |
Supply current |
|
|
6 |
9 |
mA |
|
Ile |
Leakage current |
Off condition |
|
|
10 |
uA |
|
Vsat |
Saturation voltage
output |
Iout=20mA, On
condition |
|
|
0.4 |
V |
|
Tr |
Output rising time |
Pullup resistor
=1kohms, Load
cap=20pF |
|
|
1 |
uS |
|
Tf |
Output falling time |
Pullup resistor
=1kohms, Load
cap=20pF |
|
|
1.5 |
uS |
|
Magnetic characteristics |
||||||
|
Bop |
Operate point |
Pullup resistor
=1kohms, Load
cap=20pF |
14 |
30 |
50 |
Gauss |
|
Brp |
Release point |
Pullup resistor =1kohms, Load cap=20pF |
5 |
20 |
35 |
Gauss |
|
Bhys |
Hysteresys |
Pullup resistor =1kohms, Load cap=20pF |
6 |
10 |
20 |
Gauss |
9.Function diagram
AH422, unipolar Hall Effect switch, designed with Bipolar technology, includes on-chip Hall element voltage generator, a voltage regulator for operation with supply voltages of 3.5 to 60V, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an open-collector output.
