IC-MA_14 Datasheet, PDF (2/19 Pages) IC-Haus GmbH – 8-BIT ANGULAR HALL SENSOR / ENCODER

iC-MA
8-BIT ANGULAR HALL SENSOR / ENCODER
Rev C1, Page 2/19
DESCRIPTION
The CMOS device iC-MA consists of a quadruple
Hall sensor array which has been optimized for the
magnetic measurement of angles of rotation. This ar-
ray permits error-tolerant adjustment of the magnet,
reducing assembly efforts. The integrated signal con-
ditioning 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 2 Vpp regardless of variations in
the magnetic field 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.
CONTENTS
PACKAGING INFORMATION
PIN CONFIGURATION
DFN10 4 mm x 4 mm
(according to the JEDEC standard) . . .
PACKAGE DIMENSIONS . . . . . . . . . . .
3 OPERATING MODES
11
ANALOG MODES OF OPERATION
12
3
S-Sensor Mode . . . . . . . . . . . . . . . . . 12
4
D-Sensor Mode . . . . . . . . . . . . . . . . . 12
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
ELECTRICAL CHARACTERISTICS
OPERATING REQUIREMENTS
Logic . . . . . . . . . . . . . . . . . . . . . . .
THE SENSOR PRINCIPLE
DEFINITION OF THE ANGLE OF ROTATION
AND THE DIRECTION OF ROTATION
5 ^{RESISTOR MODES OF OPERATION}
13
Resistor Modes of Operation . . . . . . . . . 13
5
AB-CHAIN, D-CHAIN AND S-CHAIN MODES 14
6
AB-Chain Mode . . . . . . . . . . . . . . . . . 15
D-Chain Mode . . . . . . . . . . . . . . . . . 15
7
S-Chain Mode . . . . . . . . . . . . . . . . . 15
8
INCREMENTAL ABZ MODES
16
9
INCREMENTAL CLK MODES
17
CLK-INC Mode . . . . . . . . . . . . . . . . . 17
9
DIR-INC Mode . . . . . . . . . . . . . . . . . 18
PROGRAMMING THE CONFIGURATION
9 REVISION HISTORY
18