HAL805UT-A datasheet(11/24 Pages) MICRONAS

Part #	HAL805UT-A

Description	Programmable Linear Hall Effect Sensor

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Manufacturer	MICRONAS [Micronas]

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PRELIMINARY DATA SHEET

HAL 805

Micronas

11

Step 2: Calculation of VOQ and Sensitivity

There are two ways to calculate the values for VOQ

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 VOUT1 =

4.5 V and VOUT2 = 0.5 V, the values for Sensitivity and

VOQ are calculated as

Software Calibration:

Use the menu CALIBRATE from the PC software and

enter the values 4.5 V for VOUT1 and 0.5 V for VOUT2.

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 VOQ 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

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

4.5 V

− 0.5 V

−2500 − 2350

Sensitivity =

5V

2048

*

=

−0.3378

VOQ = 4.5 V −

2048

−2500 * (−0.3378) * 5 V

= 2.438 V

TO-92UT

x1 − x2/ 2 ≤ 0.2 mm

y = 1.5 mm

± 0.2 mm

sensitive area

y

4.06 ±0.1

x2

4.05 ±0.1

13.0

min.

1.27

(2.54)

123

0.42

0.3

1.5

0.36

branded side

0.8

45

°

0.55

0.48

SPGS0014-3-A/1E

x1

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