HAL1820UA-A Просмотр технического описания (PDF) - Micronas

Номер в каталоге

Компоненты Описание

производитель

HAL1820UA-A

Programmable Linear Hall Effect Sensor

Micronas 

HAL 1820

DATA SHEET

ADC

{ }+FS +range

0

8-bit offset value (128...+127) 8-bit sensitivity value (128...+127)

±0.5 (OALN = 0)

±2

±1 ±0.125 (OALN = 1)

x+

*

clamp

y/n

10-bit readout-value (512...+511)

y ±1 @ offset = 0 and sensitivity = 1

{ FS range

FS~~ range

ADC value

range ±7936

adder out

range 8192/8191

Definition: FS of ADC = 1.

Fig. 2–3: Signal path HAL1820

2.2.4. Signal Path

Fig. 2–3 shows the signal path and signal processing

of HAL1820. The measurement output value y is cal-

culated out of the input signal X with the following

equation

Y = sensitivity  X – OFFSET

The parameters offset and sensitivity are two’s com-

plement encoded 8-bit values (see Section 2.2.1. on

page 8).

Locking the Sensor

The last step is activating the LOCK function by setting

the LOCK bit. Please note that the LOCK function

becomes effective after power-down and power-up of

the Hall IC. The sensors EEPROM is then locked and

its content can not be changed anymore. The sensor

still answers to read commands on the supply line.

Warning: This register cannot be reset!

2.3. Calibration Procedure

2.3.1. General Procedure

For calibration in the system environment, the applica-

tion kit from Micronas is recommended. It contains the

hardware for the generation of the serial telegram for

programming and the corresponding software for the

input of the register values.

For the individual calibration of each sensor in the cus-

tomer application, a two-point adjustment is recom-

mended. Please use Micronas Software Kit for the cal-

ibration.

10

July 3, 2013; DSH000158_003EN

Micronas

Share Link: