preliminary
preliminary
iC-PVS
LINEAR/OFF-AXIS
BATTERY-BUFFERED ABSOLUTE POSITION HALL SENSOR
Rev A2, Page 2/51
DESCRIPTION
iC-PVS is a high performance hall sensor used for
incremental or absolute position sensing. It generates
analog sine/cosine signals usable as inputs to down-
stream high resolution A/D conversion.
Additionally, an ultra low power magnetic period
counter, used for linear and off-axis absolute position
sensing is integrated. On main power shutdown,
iC-PVS automatically switches to battery supply and
continues scanning solely the absolute position. To
save power, the high resolution analog signal output
is inactive in battery mode.
iC-PVS operates with pole wheels or linear scales
with a pole width of 1.0 mm up to 2.5 mm. Ferrous
gear wheels with a gear tooth module of 0.3 up to 1.5
can be scanned with the help of a back-bias magnet.
The iC-PVS delivers the analog signal for further in-
terpolation, as well as the absolute position reference
value. In combination with suitable iC-Haus interpola-
tor devices like iC-TW29 an entire true absolute, high
resolution encoder system can be created with just
these two devices.
Coming with an integrated interpolation stage, the
iC-PVS can also be used as a stand-alone absolute
encoder with up to 6-bit electrical resolution per mag-
netic pole period.
Various interfaces for configuration and data commu-
nication are available. The serial I/O interface can
act as a sensor interface using either the BiSS C
protocol (up to 10 MHz, bidirectional), SSI protocol
(up to 4 MHz) or SPI protocol (4-pin SPI, 4 MHz).
Additionally incremental and parallel output modes
are available.
After power-on, the iC-PVS collects its CRC protected
configuration data from an external I
2
C-EEPROM
or waits for the configuration from one of the I/O
interfaces. An undervoltage reset zeroes internal reg-
isters. Furthermore, the pin PRE serves as a preset
input (high active). Additional to EEPROM readout,
the I
2
C interface can also be used for direct register
communication via the I
2
C protocol.
The period counter stage is designed for ultra low
power applications and can be configured to support
angular accelerations up to 80 000 rad/s
2
with 32
magnetic periods per revolution. The maximum mag-
netic signal frequency is 25 kHz. This corresponds
to a rotational frequency of 46 000 rpm for magnetic
scales with 32 pole pairs. With higher demands
on acceleration, the battery power consumption in-
creases. The maximum supported acceleration is
configurable, therefore an optimal trade-off between
power consumption and supported acceleration can
be individually chosen to meet the demands of the
individual application.
The device offered here is a multi-functional iC that contains in-
tegrated BiSS C interface components. The BiSS C process is
protected by patent DE 10310622 B4 owned by iC-Haus GmbH.
Users benefit from the open BiSS C protocol with a free license
which is necessary when using the BiSS C protocol in conjunction
with this iC.
Download the license at
General notice on application-specific programming
Parameters defined in the datasheet represent supplier’s
attentive tests and validations, but - by principle - do not imply
any warranty or guarantee as to their accuracy, completeness or
correctness under all application conditions. In particular, setup
conditions, register settings and power-up have to be thoroughly
validated by the user within his specific application environment
and requirements (system responsibility).
The performance of iC-PVS in application is impacted by
system conditions like quality of the magnetic target and its
adjustment, field strength and stray fields, temperature and
mechanical stress and initial calibration.