HAL815 datasheet(18/24 Pages) MICRONAS

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HAL 815

ADVANCE INFORMATION

Micronas

4.4. Undervoltage Behavior

In a voltage range below 4.5 V to approximately 3.5 V,

the operation of the HAL 815 is typically given and pre-

dictable for the most sensors. Some of the parameters

may be out of the specification. Below about 3.5 V, the

digital processing is reset. If the supply voltage once

again rises above about 3.5 V, a startup time of about

µs elapses for the digital processing to occur. As

long as the supply voltage is still above about 2.8 V,

the analog output is kept at its last valid value ratiomet-

ric to VDD. Below about 2.5 V, the entire sensor will

reset.

4.5. Ambient Temperature

Due to the internal power dissipation, the temperature

on the silicon chip (junction temperature TJ) is higher

than the temperature outside the package (ambient

temperature TA).

TJ = TA + ∆T

At static conditions, the following equation is valid:

∆T = I

DD * VDD * RthJA

For typical values, use the typical parameters. For

worst case calculation, use the max. parameters for

IDD and Rth, and the max. value for VDD from the appli-

cation.

For VDD = 5.5 V, Rth = 200 K/W and IDD = 10 mA the

temperature difference

∆T = 11 K.

For all sensors, the junction temperature TJ is speci-

fied. The maximum ambient temperature TAmax can be

calculated as:

TAmax = TJmax −∆T

4.6. EMC and ESD

The HAL 815 is designed for a stabilized 5 V supply.

Interferences and disturbances conducted along the

12 V onboard system (product standards DIN40839

part 1 or ISO 7637 part 1) are not relevant for these

applications.

For applications with disturbances by capacitive or

inductive coupling on the supply line or radiated distur-

bances, the application circuit shown in Fig. 4–1 is rec-

ommended.

Applications

with

this

arrangement

passed the EMC tests according to the product stan-

dards DIN 40839 part 3 (Electrical transient transmis-

sion by capacitive or inductive coupling) and part 4

(Radiated disturbances).

Please contact Micronas for the detailed investigation

reports with the EMC and ESD results.

−810

−860

−116

−910

−216

−960

−316

−1020

−417

−1070

−517

−1120

−617

−1180

−718

−1250

−818

−1320

−919

−1380

−10

−1430

−11

−1500

−12

−1570

−13

−1640

−14

−1710

−15

−1780

−16

−1870

−17

−1950

−18

−2030

−19

−2100

−20

−2180

−21

−2270

−22

−2420

−24

−2500

−25

−2600

−26

−2700

−27

−2800

−28

−2900

−29

−3000

−30

−3100

−31

Temperature

Coefficient of

Magnet (ppm/K)

TCSQ

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