IC-MHM Datasheet, PDF (2/63 Pages) IC-Haus GmbH – 14-BIT ABSOLUTE ANGLE HALL ENCODER

iC-MHM
14-BIT ABSOLUTE ANGLE HALL ENCODER
Rev D1, Page 2/63
DESCRIPTION
The iC-MHM is an absolute angular position sensor
(encoder) using four integrated Hall sensors for sens-
ing a diametrical magnetized permanent magnet. Out-
put is absolute position in BiSS, SSI, or SPI format
and/or incremental position via encoder quadrature
(ABZ) signals.
Integrated line drivers and receivers are provided for
for BiSS C or SSI stand-alone encoder applications.
SSI ring-mode operation is also supported. TTL or
LVDS level SPI communication with a host proces-
sor or microcontroller can be selected for embedded
applications.
The Hall sensors provide differential signals propor-
tional to the sine and cosine of the magnet’s angular
position. These signals can be calibrated to eliminate
voltage offsets, amplitude differences and harmonic
distortion. An automatic amplitude control maintains
1 Vpp signal amplitudes regardless of changes in air-
gap or temperature.
An integrated interpolator uses the calibrated sine
and cosine signals to determine the angular position
of the permanent magnet with a resolution of 4 096
increments per revolution. Turns count information
from an external multiturn sensor can also be read in
and synchronized with the interpolated angle using
the integrated multiturn SSI interface.
The iC-MHM is configured using the integrated serial
port in BiSS C or SPI mode. In stand-alone appli-
cations, configuration parameters are stored in an
external EEPROM and protected by a CRC for use
at startup. The integrated I²C multi-master interface
allows the same EEPROM to be used by external
multiturn sensors such as the iC-MV and iC-PV for
configuration storage.
A 4-bit digital I/O port provides general-purpose or
dedicated discrete I/O for application versatility.
The iC-MHM is a multi-function device that contains integrated
BiSS C interface components. The BiSS C process is protected
by patent DE 10310622 B4, owned by iC-Haus GmbH, and its
use requires the execution of a license (free of charge).
Download the license at www.biss-interface.com/bua