1996 Dec 05

2

Philips Semiconductors

Preliminary specification

Integrated rotational speed sensor

KMI15/1

FEATURES

• Digital current output signal

• Zero speed capability

• Wide air gap

• Wide temperature range

• Insensitive to vibration

• EMC resistant.

DESCRIPTION

The KMI15/1 sensor detects rotational speed of ferrous

The sensor consists of a magnetoresistive sensor

element, a signal conditioning integrated circuit in bipolar

technology and a magnetized ferrite magnet.

The frequency of the digital current output signal is

proportional to the rotational speed of a gear wheel.

(1) The sensor contains a customized integrated circuit. Usage in

hydraulic brake systems and in systems with active brake

control is forbidden.

CAUTION

Do not press two or more products together against their

magnetic forces.

PINNING

PIN

DESCRIPTION

2V

−

Fig.1 Simplified outline; (SOT453B).

handbook, halfpage

MBH781

12

QUICK REFERENCE DATA

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

DC supply voltage

−

12

−

V

current output signal low

−

7

−

mA

current output signal high

−

14

−

mA

d

sensing distance

0 to 2.5

0 to 2.9

−

mm

operating tooth frequency

0

−

25000

Hz

ambient operating temperature

−40

−

+85

°C