HAL1821UA-A Datasheet, PDF (4/14 Pages) Micronas – Linear Hall-Effect Sensor Family in SOT89B Package

HAL 1821...HAL 1823
DATA SHEET
Linear Hall-Effect Sensor Family in SOT89B Pack-
age
Release Note: Revision bars indicate significant
changes to the previous edition.
1. Introduction
The HAL182x is a new family of linear Hall-effect sen-
sors. It is a universal magnetic field sensor with a ratio-
metric, linear analog output. This sensor family can be
used for magnetic field measurements, current mea-
surements and detection of mechanical movements.
Very accurate angle measurements or distance mea-
surements can also be done. The sensors are very
robust and can be used in harsh environments.
The output voltage is proportional to the magnetic flux
density through the hall plate. The choppered offset
compensation leads to stable magnetic characteristics
over supply voltage and temperature.
The different family members vary by sensitivity
(25 mV/mT, 31.25 mV/mT and 50 mV/mT). The quies-
cent output voltage (offset) is for all family members
50% of supply voltage.
The sensor is designed for industrial applications and
operates in the junction temperature range from –40 °C
up to 170 °C.
1.1. Major Applications
Due to the sensor’s robust characteristics, the
HAL182x is the optimal system solution for applica-
tions such as:
– linear position measurements,
– angle sensors,
– distance measurements,
– magnetic field and current measurement.
1.2. Features
– ratiometric linear output proportional to the mag-
netic field
– temperature and stress stable quiescent output volt-
age
– very accurate sensitivity and offset
– customized versions possible
– on-chip temperature compensation
– active offset compensation
– operates from 40 °C up to 170 °C junction temper-
ature
– operates from 4.5 V up to 5.5 V supply voltage in
specification operates with static magnetic fields
and dynamic magnetic fields up to 2.25 kHz
– overvoltage and reverse-voltage protection
at V_SUP pin
– magnetic characteristics extremely robust against
mechanical stress
– short-circuit protected push-pull output
– EMC and ESD optimized design
1.3. Family Overview
Type
1821
1822
1823
Offset
50% of V_SUP
50% of V_SUP
50% of V_SUP
Sensitivity
50 mV/mT
31.25 mV/mT
25 mV/mT
see
Page
11
11
11
1.4. Marking Code
The HAL182x has a marking on the package surface
(branded side). This marking includes the name of the
sensor and the temperature range.
Type
HAL 1821
HAL 1822
HAL 1823
Temperature Range
A
1821A
1822A
1823A
1.5. Operating Junction Temperature Range (T_J)
The Hall sensors from Micronas are specified to the
chip temperature (junction temperature T_J).
A: TJ = 40 °C to +170 °C
The relationship between ambient temperature (T_A)
and junction temperature is explained in Section 4.1.
on page 13.
4
Aug. 2, 2013; DSH000162_001EN
Micronas