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PDF HAL815 Data sheet ( Hoja de datos )
| Número de pieza | HAL815 | |
| Descripción | Programmable Linear Hall-Effect Sensor | |
| Fabricantes | Micronas | |
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Hardware
Documentation
Data Sheet
HAL® 815
Programmable Linear
Hall-Effect Sensor
Edition Feb. 7, 2006
6251-537-3DS
1 page  
DATA SHEET
HAL 815
– overvoltage and reverse-voltage protection at all
pins
– magnetic characteristics extremely robust against
mechanical stress
– short-circuit protected push-pull output
– EMC and ESD optimized design
1.3. Marking Code
The HAL815 has a marking on the package surface
(branded side). This marking includes the name of the
sensor and the temperature range.
Type
HAL 815
Temperature Range
AK
815A
815K
1.3.1. Special Marking of Prototype Parts
Prototype parts are coded with an underscore beneath
the temperature range letter on each IC. They may be
used for lab experiments and design-ins but are not
intended to be used for qualification tests or as produc-
tion parts.
1.4. Operating Junction Temperature Range (TJ)
The Hall sensors from Micronas are specified to the
chip temperature (junction temperature TJ).
A: TJ = −40 °C to +170 °C
K: TJ = −40 °C to +140 °C
The relationship between ambient temperature (TA)
and junction temperature is explained in Section 4.4.
on page 24.
Hall sensors are available in a wide variety of packag-
ing versions and quantities. For more detailed informa-
tion, please refer to the brochure: “Hall Sensors:
Ordering Codes, Packaging, Handling”.
1.6. Solderability
During soldering reflow processing and manual
reworking, a component body temperature of 260 °C
should not be exceeded.
Solderability is guaranteed for one year from the date
code on the package.
1.7. Pin Connections and Short Descriptions
Pin Pin Name Type Short Description
No.
1 VDD IN Supply Voltage and
Programming Pin
2 GND
Ground
3
OUT
OUT Push Pull Output
and Selection Pin
1 VDD
OUT
3
2 GND
Fig. 1–1: Pin configuration
1.5. Hall Sensor Package Codes
HALXXXPA-T
Temperature Range: A and K
Package: UT for TO92UT-1/-2
Type: 815
Example: HAL815UT-K
→ Type:
815
→ Package:
TO92UT
→ Temperature Range: TJ = −40°C to +140°C
Micronas
Feb. 7, 2006; 6251-537-3DS
5
5 Page 
DATA SHEET
HAL 815
Step 2: Calculation of VOQ and Sensitivity
The calibration points 1 and 2 can be set inside the
specified range. The corresponding values for VOUT1
and VOUT2 result from the application requirements.
Low clamping voltage ≤ VOUT1,2 ≤ High clamping voltage
For highest accuracy of the sensor, calibration points
near the minimum and maximum input signal are rec-
ommended. The difference of the output voltage
between calibration point 1 and calibration point 2
should be more than 3.5 V.
Set the system to calibration point 1 and read the reg-
ister ADC-READOUT. The result is the value ADC-
READOUT1.
Now, set the system to calibration point 2, read the
register ADC-READOUT again, and get the value
ADC-READOUT2.
With these values and the target values VOUT1 and
VOUT2, for the calibration points 1 and 2, respectively,
the values for Sensitivity and VOQ are calculated as:
Sensitivity =
VOUT1 − VOUT2
ADC-READOUT1 − ADC-READOUT2
*
2048
VDD
VOQ = VOUT1 −
ADC-READOUT1 * Sensitivity * VDD
2048
This calculation has to be done individually for each
sensor.
Next, write the calculated values for Sensitivity and
VOQ into the IC for adjusting the sensor.
The sensor is now calibrated for the customer applica-
tion. However, the programming can be changed
again and again if necessary.
2.3.2. Calibration of the Angle Sensor
The following description explains the calibration pro-
cedure using an angle sensor as an example. The
required output characteristic is shown in Fig. 2–7.
– the angle range is from −25° to 25°
– temperature coefficient of the magnet: −500 ppm/K
V
5
Clamp-high = 4.5 V
VOUT 4
Calibration point 1
3
2
1
Clamp-low = 0.5 V
Calibration point 2
0
−30 −20 −10 0
10 20 30 °
Angle
Fig. 2–7: Example for output characteristics
Step 3: Locking the Sensor
The last step is activating the LOCK function with the
“LOCK” command. Please note that the LOCK function
becomes effective after power-down and power-up of
the Hall IC. The sensor is now locked and does not
respond to any programming or reading commands.
Warning: This register cannot be reset!
Micronas
Feb. 7, 2006; 6251-537-3DS
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HAL815.PDF ] | |
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