KMI15SLASH4 datasheet(10/16 Pages) PHILIPS

10 / 16 page

2000 Sep 05

Philips Semiconductors

Product speciﬁcation

Rotational speed sensor

KMI15/4

EMC

Figure 18 shows a recommended application circuit for

automotive applications (wheel sensing ft < 5 kHz).

It provides a protection interface to meet Electromagnetic

Compatibility (EMC) standards and safeguard against

voltage spikes Table 1 lists the tests which are applicable

to this circuit and the achieved class of functional status.

Protection against ‘load dump’ (test pulse 5 according to

“DIN 40839”) means a very high demand on the protection

circuit and requires a suitable suppressor diode with

sufficient energy absorption capability.

The board net often contains a central load dump

protection that makes such a device in the protection

circuit of the sensor module unnecessary.

Tests for electrostatic discharge (ESD) were conducted in

line with

“IEC 801-2” to demonstrate the KMI15/4’s

handling capabilities. The

“IEC 801-2” test conditions

were: C = 150 pF, R = 150

Ω, V = 2 kV.

Electromagnetic disturbances with fields up to 150 V/m

and f = 1 GHz (ref.

“DIN 40839”) have no influence on

performance.

Table 1

EMC test results

EMC REF. DIN 40839

SYMBOL

MIN. (V)

MAX. (V)

REMARKS

CLASS

Test pulse 1

VLD

−100

−

td = 2 ms

Test pulse 2

VLD

−

100

td = 0.2 ms

Test pulse 3a

VLD

−150

−

td = 0.1 µsA

Test pulse 3b

VLD

−

100

td = 0.1 µsA

Test pulse 4

VLD

−7

−

td = 130 ms

Test pulse 5

VLD

−

120

td = 400 ms

Fig.18 Test/application circuit for the KMI15/4.

handbook, halfpage

MGD805

115

Ω

100

BZTO3G36

1N4001/3

GND

−V

VCC

SENSOR

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