HAL805 Datasheet, PDF (11/24 Pages) Micronas – Programmable Linear Hall Effect Sensor

PRELIMINARY DATA SHEET
HAL 805
Step 2: Calculation of V_OQ and Sensitivity
There are two ways to calculate the values for V_OQ
and Sensitivity.
Manual Calculation:
Set the system to calibration point 1 (angle 1 = −25°)
and read the register ADC-READOUT. For our exam-
ple, the result is ADC-READOUT1 = −2500.
Next, set the system to calibration point 2 (angle 2 =
25°), and read the register ADC-READOUT again. For
our example, the result is ADC-READOUT2 = +2350.
With these measurements and the targets V_OUT1 =
4.5 V and V_OUT2 = 0.5 V, the values for Sensitivity and
V_OQ are calculated as
4.5 V − 0.5 V 2048
Sensitivity = _{−2500 − 2350 * 5 V} = −0.3378
V_OQ = 4.5 V −
−2500 * (−0.3378) * 5 V _{= 2.438 V}
2048
Software Calibration:
Use the menu CALIBRATE from the PC software and
enter the values 4.5 V for V_OUT1 and 0.5 V for V_OUT2.
Set the system to calibration point 1 (angle 1 = −25°),
hit the button “Read ADC-Readout1”, set the system to
calibration point 2 (angle 2 = 25°), hit the button “Read
ADC-Readout2”, and hit the button “Calculate”. The
software will then calculate the appropriate V_OQ and
Sensitivity.
This calculation has to be done individually for each
sensor. Now, write the calculated values with the “write
and store” command into the HAL 805 for program-
ming the sensor.
Step 3: Locking the Sensor
The last step is activating the LOCK function with the
“LOCK” command. The sensor is now locked and does
not respond to any programming or reading com-
mands.
Warning: This register cannot be reset!
3. Specifications
3.1. Outline Dimensions
1.5
0.3
4.06 ±0.1
x1
x2
sensitive area
y
4.05 ±0.1
0.48
0.55 1 2 3
0.36
13.0
min.
0.42
1.27 1.27
(2.54)
branded side
45°
0.8
SPGS0014-3-A/1E
Fig. 3–1:
Plastic Transistor Single Outline Package
(TO-92UT)
Weight approximately 0.14 g
Dimensions in mm
Note: A mechanical tolerance of ±50 µm applies to all
dimensions where no tolerance is explicitly given.
3.2. Dimensions of Sensitive Area
0.25 mm x 0.25 mm
3.3. Position of Sensitive Area
TO-92UT
x1 − x2/ 2 ≤ 0.2 mm
y = 1.5 mm ± 0.2 mm
Micronas
11