HAL824 查看數據表（PDF） - Micronas

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产品描述 (功能)

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HAL824

High-Precision Programmable Linear Hall-Effect Sensor

Micronas 

HAL 82x

DATA SHEET

Sensitivity

The SENSITIVITY register contains the parameter for

the multiplier in the DSP. The Sensitivity is program-

mable between −4 and 4. For VDD = 5 V, the register

can be changed in steps of 0.00049.

For all calculations, the digital value from the magnetic

field of the D/A converter is used. This digital informa-

tion is readable from the D/A-READOUT register.

SENSITIVITY

=

-----------Δ----V----o---u--t---×-----1---6---3---8---4------------

2 ⋅ ΔDA-Readout ⋅ VDD

VOQ

The VOQ register contains the parameter for the

adder in the DSP. VOQ is the output voltage without

external magnetic field (B = 0 mT) and programmable

from −VDD up to VDD. For VDD = 5 V, the register can

be changed in steps of 4.9 mV.

Note: If VOQ is programmed to a negative voltage, the

maximum output voltage is limited to:

GP Register

This register can be used to store some information,

like production date or customer serial number. Micro-

nas will store production Lot number, wafer number

and x,y coordinates in three blocks of this registers.

The total register contains of four blocks with a length

of 13 bit each. The customer can read out this informa-

tion and store it in his own production data base for ref-

erence or he can change them and store own produc-

tion information.

Note: To enable programming of the GP register bit 0

of the MODE register has to be set to 1. This

register is not a guarantee for trace-ability.

LOCKR

By setting the first bit of this 2-bit register, all registers

will be locked, and the sensor will no longer respond to

any supply voltage modulation. This bit is active after

the first power-off and power-on sequence after setting

the LOCK bit.

Warning: This register cannot be reset!

VOUTmax = VOQ + VDD

Clamping Voltage

The output voltage range can be clamped in order to

detect failures like shorts to VDD or GND or an open

circuit.

The CLAMP-LOW register contains the parameter for

the lower limit. The lower clamping voltage is program-

mable between 0 V and VDD/2. For VDD = 5 V, the reg-

ister can be changed in steps of 9.77 mV.

The CLAMP-HIGH register contains the parameter for

the upper limit. The upper clamping voltage is pro-

grammable between 0 V and VDD. For VDD = 5 V, in

steps of 9.77 mV.

D/A-READOUT

This 14-bit register delivers the actual digital value of

the applied magnetic field after the signal processing.

This register can be read out and is the basis for the

calibration procedure of the sensor in the system envi-

ronment.

Note: The MSB and LSB are reversed compared with

all the other registers. Please reverse this regis-

ter after readout.

10

Feb. 3, 2009; DSH000143_003EN

Micronas

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