HAL202 DATA SHEET
14 Sept. 18, 2014; DSH000159_002EN Micronas
5. Application Notes
5.1. Ambient Temperature
Due to the internal power dissipation, the temperature
on the silicon chip (junction temperature T
J
) is higher
than the temperature outside the package (ambient
temperature T
A
).
At static conditions and continuous operation, the fol-
lowing equation applies:
If I
OUT
> I
DD
, please contact Micronas application sup-
port for detailed instructions on calculating ambient
temperature.
For typical values, use the typical parameters. For
worst case calculation, use the max. parameters for
I
DD
and R
th
, and the max. value for V
DD
from the
application.
For all sensors, the junction temperature range T
J
is
specified. The maximum ambient temperature T
Amax
can be calculated as:
5.2. Operation
5.2.1. Extended Operating Conditions
All HAL202-sensors fulfill the electrical and magnetic
characteristics when operated within the Recom-
mended Operating Conditions (see page 10).
Supply Voltage Below 3.8 V
Typically, the sensor operates with supply voltages
above 3 V, however, below 3.8 V some characteristics
may be outside the specification.
Note: The functionality of the sensor below 3.8 V is
not tested. For special test conditions, please
contact Micronas.
5.2.2. Start-up Behavior
Due to the active offset compensation, the sensor has
an initialization time (enable time t
en(O)
) after applying
the supply voltage. The parameter t
en(O)
is specified in
Section 4.8.: Characteristics on page 11.
During the initialization time, the output state is not
defined and the output can toggle. After t
en(O)
, the out-
put will be low if the applied magnetic field B is above
B
ON
. The output will be high if B is below B
OFF
.
For magnetic fields between B
OFF
and B
ON
, the output
state of the HAL sensor after applying V
DD
will be
either low or high. In order to achieve a well-defined
output state, the applied magnetic field must be above
B
ONmax
, respectively, below B
OFFmin
.
5.3. EMC and ESD
For applications with disturbances on the supply line or
radiated disturbances, a series resistor and a capacitor
are recommended (see Fig. 5–1). The series resistor
and the capacitor should be placed as closely as
possible to the HAL sensor.
Applications with this arrangement passed the EMC
tests according to the product standards ISO 7637.
Please contact Micronas for the detailed investigation
reports with the EMC and ESD results.
Fig. 5–1: Test circuit for EMC investigation
R
V
220
V
EMC
V
P
4.7 nF
V
DD
OUT
GND
1
2
3
R
L
1.2 k
20 pF
