IC-MPEVALMP1D datasheet(2/22 Pages) ICHAUS

2 / 22 page

iC-MP 8-BIT HALL ANGLE ENCODER

WITH RATIOMETRIC OUTPUT

Rev B1, Page 2/22

DESCRIPTION

iC-MP consists of a quadruple Hall sensor array

which has been optimized for the magnetic mea-

surement of an axis angle. The array permits error-

tolerant adjustment of the magnet, reducing the time

and effort required assembly. The integrated signal

conditioning unit provides a differential sine/cosine

signal at its outputs. The sensor generates one sine

cycle per full rotation of the magnet, enabling the

angle to be clearly determined. At the same time

the internal amplitude control unit produces a regu-

lated output amplitude of 2 Vpp, regardless of vari-

ations in the magnetic ﬁeld strength, supply voltage

and temperature. Furthermore, error signals are pro-

vided which report any magnet loss and an exces-

sively high RPM speed.

With the aid of the integrated 8-bit sine-to-digital

converter the axis angle is determined from the

sine/cosine signals. The absolute position angle is

output via the serial interface together with a bit indi-

cating an error. The maximum resolution of 8 bits is

maintained up to revolutions of 12,000 rpm.

The absolute angle is converted back to a linear ana-

log output voltage using the internal D/A converter.

The analog output voltage range can be programmed

to be either rail to rail or 10 % to 90 % of the supply

voltage. The angular range of the analog signal is

conﬁgurable to 90°, 180°, 270° or 360°.

iC-MP can be easily cascaded, enabling scanning of

multiple axes. In Fast Scanning Mode all devices

connected in a queue are read consecutively. In Slow

Scanning Mode (Power Save Mode) each individual

device is booted up before the serial data or analog

output voltage is put on the common bus.

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