HAL856 datasheet(12/42 Pages) MICRONAS

12 / 42 page

HAL856

DATA SHEET

March 23, 2010; DSH000142_002EN

Micronas

Output Characteristic

The OUTPUT CHARACTERISTIC register defines the

shape of the sensor output signal. It consists of

32 setpoints. Each setpoint can be set to values

between 0 and 511 LSB. The output characteristic has

to be monotonic increasing (Setpoint0

≤ Setpoint1

≤ SetpointN).

LOCKR

By setting this 1-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!

Digital Output

This 12-bit register delivers the actual digital value of

the applied magnetic field after the signal processing.

This register can only be read out, and it is the basis

for the calibration procedure of the sensor in the sys-

tem environment.

Offset Correction

The OFFSET CORRECTION register allows to adjust

the digital offset of the built-in A/D-converter. The digi-

tal offset can be programmed to

−3/4, −1/2, −1/4, 0,

+1/4, +1/2, +3/4 of full-scale.

Note: Using the Offset Correction will change the

Micronas trimming of the LSB adjusted offset.

Slew Rate

The SLEW RATE register is a “sub”-register of the

CURRENTSOURCE register. The output signal fall

and rise time of the HAL856 depends on the SLEW

RATE register setting and the external load circuit.

Note: The slew rate can be programmed to optimize

the EMI behavior of the application. The differ-

ential current change has a Gaussian shape for

low emission.

Please contact Micronas Application Support in

case further slew rates are required.

Fig. 2–5: Typical IDD vs. slew rate for setting “slowest

slew rate”

Table 2–6: OFFSET CORRECTION register definition

Offset Correction

Bit Setting

−3/4

−1/2

−1/4

1/4

1/2

3/4

Table 2–7: SLEW RATE register definition

Typ. Values (Sensor Only)

Bit Setting

Rise time

[µs/mA]

Fall time

[µs/mA]

0.05

0.1

0.3

0.6

0.5

1.1

0.8

1.6

HAL856 Datasheet(PDF) 12 Page - Micronas

HAL856 Datasheet(HTML) 12 Page - Micronas

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Datasheet Download

Link URL