IC-NQ Datasheet, PDF (24/25 Pages) IC-Haus GmbH – 13-bit Sin/D CONVERTER WITH CALIBRATION

iC-NQ
13-bit Sin/D CONVERTER WITH CALIBRATION
DESIGN REVIEW: Notes On Chip Functions
Rev D1, Page 24/25
iC-NQ X2
iC-NQ X3
No.
1
Function, Parameter/Code
SELRES
Illegal setting:
0x0E for resolution 4
2
ZPOS
Illegal settings:
0x01...0x07, 0x09...0x0F,
0x11...0x17, 0x19...0x1F
3
M2S
Illegal settings:
0x02, 0x03
Description and Application Hints
A minimal resolution of 8 is required for the frequency monitoring function and
period counting as well. Thus, a binary resolution of 4 is not permitted when
using the period counter and the serial interface for data output with the BiSS or
SSI protocol.
A resolution of 4 may be used for solely incremental applications with A/B/Z
output, what then requires the deactivation of the frequency monitoring function
(by FERR set to 0x00).
Illegal settings of ZPOS delay accurate converter operation following power on.
Depending on the sin/cos input signals (phase angle) the A/B outputs can
provide pulses causing an external counter to alternately count up and down.
This may disturb the startup of a drive if the motion controller tolerates only single
A/B edges during standstill checking.
The converter operation is again accurate when the sin/cos input signals have
changed, by a maximum of 45 angular degrees.
Illegal settings, enabling a period counter output of 12 or 24 bits, may cause
position data jumping with fast changes in the direction of count (e.g. applications
with length gauges).
It is thus advisable to use 8-bit period counting (M2S 0x01) and to capture the
overflow in the external microcontroller.
Table 40: Notes on chip functions regarding iC-NQ chip releases X2, X3
iC-NQ V2
No.
1
Function, Parameter/Code
SELRES
2
Description and Application Hints
See description given for iC-NQ X2, X3
No further exclusions known at time of printing.
Table 41: Notes on chip functions regarding iC-NQ chip release V2
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