IC-NQ Datasheet, PDF (2/25 Pages) IC-Haus GmbH – 13-bit Sin/D CONVERTER WITH CALIBRATION

iC-NQ
13-bit Sin/D CONVERTER WITH CALIBRATION
Rev D1, Page 2/25
DESCRIPTION
iC-NQ is a monolithic A/D converter which, by ap-
plying a count-safe vector follower principle, converts
sine/cosine sensor signals with a selectable resolu-
tion and hysteresis into angle position data. This ab-
solute value is output via a high-speed synchronous-
serial BiSS interface and trails a master clock rate of
up to 10 Mbit/s, or, alternatively, can be set so that it is
compatible with SSI. A period counter supplements
the position data with a multiturn count and can be
configured for BiSS single-cycle data output.
At the same time any changes in output data are
converted into incremental A QUAD B encoder sig-
nals. Here, the minimum transition distance can be
adapted to suit the system on hand (cable length, ex-
ternal counter). A synchronised zero index is gener-
ated and output to Z if enabled by the PZERO and
NZERO inputs.
The front-end amplifiers are configured as instrumen-
tation amplifiers, permitting sensor bridges to be di-
rectly connected without the need for external resis-
tors. Various programmable D/A converters are avail-
able for the conditioning of sine/cosine sensor sig-
nals with regard to offset, amplitude ratio and phase
errors. Front-end gain can be set in stages graded
to suit all common differential sensor signals from
approximately 20 mVpp to 1.5 Vpp, and also single-
ended sensor signals from 40 mVpp to 3 Vpp respec-
tively.
Two serial interfaces have been included to per-
mit configuration of the device, connection of an
EEPROM or synchronous-serial data transfer (BiSS).
Both interfaces are bidirectional and enable the com-
plete configuration of the device including the transfer
of setup and system data to the EEPROM for perma-
nent storage. If the memory is detected following a
power-down reset, the chip setup is read in and au-
tomatically repeated if a CRC error occurs.