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IC-MA Datasheet, PDF (2/18 Pages) IC-Haus GmbH – ANGULAR HALL SENSOR / ENCODER | |||
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iC-MA
ANGULAR HALL SENSOR / ENCODER
Rev B3, Page 2/18
DESCRIPTION
The CMOS device iC-MA consists of a quadruple hall
sensor array which has been optimized for the mag-
netic measurement of angles of rotation. This array
permits error-tolerant adjustment of the magnet, re-
ducing assembly efforts. The integrated signal condi-
tioning unit provides a differential sine/cosine signal
at the output. The sensor generates one sine cycle
per each full rotation of the magnet, enabling the an-
gle to be clearly determined. At the same time the
internal amplitude control unit produces an regulated
output amplitude of 2Vpp regardless of variations in
the magnetic ï¬eld strength, supply voltage and tem-
perature. Furthermore, signals are provided which
enable the sensor amplitude to be assessed and also
report any magnet loss.
With the aid of the integrated 8-bit sine/digital con-
verter the angle of rotation is determined from the
sine/cosine signals. This is output via an incremental
interface in a number of selectable resolutions. The
zero angle is indicated by an index pulse. The maxi-
mum resolution of 8-bit is maintained up to rotations
of 60,000 rpm.
The absolute angle of rotation can be converted back
to a linear analog output signal using the internal D/A
converter; here, output voltage limits can be set as
required using the external pins. Either a periodic
linear signal (sawtooth) or a delta voltage (triangle)
can be provided. iC-MA can be easily cascaded in
three different modes of chain operation so that sev-
eral axes of rotation can be scanned. The angle po-
sitions of the individual axes can then be read via a
common bus.
Used in conjunction with a permanent magnet iC-
MA can act as an encoder system with an integrated
magnetic scanning feature. No further components
are required.
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