IC-PVL Datasheet, PDF (27/33 Pages) IC-Haus GmbH – LINEAR/OFF-AXIS BATTERY-BUFFERED HALL MULTITURN ENCODER

iC-PVL LINEAR/OFF-AXIS
preliminary
BATTERY-BUFFERED HALL MULTITURN ENCODER
OSCILLATOR FREQUENCY CALIBRATION
Rev B3, Page 27/33
The bias current for the internal oscillator can be config-
ured with parameter IBIAS. An increase or decrease in
bias current will directly affect the oscillator frequency.
The bias current should be calibrated at the typical
battery supply voltage so that the frequency of the oscil-
lator is around 34 kHz (see Elec. Char. No. 301). The
clock frequency is observable at output pin DI_P1 in
the dedicated calibration mode. The calibration mode is
entered by configuring the EN_ERR parameter to "01"
(see Table 21).
IBIAS
Code
100
101
110
111
000
001
010
011
Addr. 0x03; bit 2:0
Frequency change (typ.)
+20 %
+10 %
0%
-10 %
-20 %
-30 %
-40 %
-50 %
Calibrating the oscillator frequency is not absolutely
necessary to ensure iC-PVL operation. Nevertheless,
if left uncalibrated, among others, mainly the values
defined in Table 33 and 34 may be out of range.
Table 35: Bias current: Oscillator frequency calibration.