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PDF HAL1000 Data sheet ( Hoja de datos )
| Número de pieza | HAL1000 | |
| Descripción | Programmable Hall Switch | |
| Fabricantes | Micronas | |
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Hardware
Documentation
Data Sheet
HAL® 1000
Programmable
Hall Switch
Edition March 4, 2004
6251-528-1DS
Free Datasheet http://www.datasheet4u.com/
1 page  
DATA SHEET
HAL 1000
2. Functional Description
2.1. General Function
The HAL1000 is a monolithic integrated circuit which
provides a digital output signal. The sensor is based
on the HAL 8xx design. All blocks before the compara-
tor are identical to the HAL 810 and the signal process-
ing is very similar.
The Hall plate is sensitive to magnetic north and south
polarity. The external magnetic field component per-
pendicular to the branded side of the package gener-
ates a Hall voltage. This voltage is converted to a digi-
tal value and processed in the Digital Signal
Processing Unit (DSP) according to the settings of the
EEPROM registers. The function and the parameters
for the DSP are explained in Section 2.2. on page 6.
The setting of the LOCK register disables the program-
ming of the EEPROM memory for all time. This regis-
ter cannot be reset.
As long as the LOCK register is not set, the output
characteristic can be adjusted by programming the
EEPROM registers. The IC is addressed by modulat-
ing the supply voltage (see Fig. 2–1). In the supply
voltage range from 4.5 V up to 5.5 V, the sensor gener-
ates an analog output voltage. After detecting a com-
mand, the sensor reads or writes the memory and
answers with a digital signal on the output pin. The dig-
ital output is switched off during the communication.
Internal temperature compensation circuitry and the
choppered offset compensation enables operation
over the full temperature range with minimal changes
of the switching points. The circuitry also rejects offset
shifts due to mechanical stress from the package. The
non-volatile memory consists of redundant EEPROM
cells. In addition, the HAL1000 is equipped with
devices for overvoltage and reverse-voltage protection
at all pins.
HAL
1000
8 VDD
7
6
5
VDD OUT
GND
protocol digital
output
Fig. 2–1: Programming with VDD modulation
VDD
Internally
stabilized
Supply and
Protection
Devices
Temperature
Dependent
Bias
Oscillator
Switched
Hall Plate
A/D
Converter
Digital
Signal
Processing
GND
Supply
Level
Detection
EEPROM Memory
Lock Control
Fig. 2–2: HAL1000 block diagram
Protection
Devices
Digital
Output
100 Ω
OUT
Micronas
March 4, 2004; 6251-528-1DS
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
DATA SHEET
2.4. Example: Calibration of a Position Switch
The following description explains the calibration pro-
cedure using a position switch as an example.
– The mechanical switching points are given.
– temperature coefficient of the magnet: −500 ppm/K
Step 1: Input of the registers which need not be
adjusted individually
The register values for the following registers are given
for all sensors in the application:
– FILTER
Select the filter frequency: 500 Hz
– RANGE
Select the magnetic field range: 30 mT
– TC
For this magnetic material: 6
– TCSQ
For this magnetic material: 14
Enter these values in the software, and use the “write
and store” command to store these values perma-
nently in the registers.
Step 2: Calculation of the Sensor Parameters
Set the system to the calibration point where the sen-
sor output must be high, and press “Readout BOFF”.
Set the system to the calibration point where the sen-
sor output must be low, and press “Readout BON”
Now, adjust the hysteresis to 80%, and press the key
“calibrate and store”.
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. Please note that the LOCK function becomes
effective after power-down and power-up of the Hall-
IC.
Warning: The LOCKR register cannot be reset!
HAL 1000
Micronas
March 4, 2004; 6251-528-1DS
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet HAL1000.PDF ] | |
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