IC-MN datasheet(21/62 Pages) ICHAUS

21 / 62 page

iC-MN 25-BIT NONIUS ENCODER

WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION

Rev F2, Page 21/62

OPERATING MODES and CALIBRATION PROCEDURES

iC-MN supports a number of different calibration strate-

gies, providing both digital and analog test signals to

this end. The following tables give the various modes

of operation.

For the adjustment of the signal conditioning unit ana-

log test signals are output in analog calibration modes

ANA_x, with digital signals activated by digital calibra-

tion modes DIG_x, enabling the signal conditioning

to be set across measurements of various duty cycles.

The order of the procedure for both modes of calibration

is described in the following chapter.

Alternatively, with an active signal level controller iC-MN

can be calibrated in controller modes AAC_x, where

the residual signal ripple is minimized. For this purpose

the signal gain, offset and phase correction parameters

must be set in such a way that the controller signal

CGUCKx available at pin T0 are devoid of AC contents.

In calibration modes TWIB and TEIB the tempera-

ture monitoring and bias reference source IBP can be

adjusted. Here the temperature threshold is set to the

required value for either warning or shutdown; the other

value is determined by the fixed difference of the switch-

ing thresholds.

As the VTTx measurement voltages and CGUCKx sig-

nals are only available via a buffer stage the buffer

offset voltage must be taken into account if the temper-

ature thresholds are to be adjusted with any accuracy.

To this end the buffer offset voltage can be measured in

calibration mode TBOS. A voltage is then applied to

pin T1, with the buffer offset voltage being the difference

between this and pin T0.

Parameter

Output Signals

Op. Mode TRACMODE CALMODE BYP* Pins PSOUT, NSOUT, PCOUT, NCOUT Pin T0 Pin T1 Pin DIR

Normal

Output of master track via line driver

Table 8: Normal operating mode

Parameter

Output Signals

Op. Mode TRACMODE CALMODE BYP* Pins PSOUT, NSOUT, PCOUT, NCOUT Pin T0

Pin T1

Pin DIR

Signal calibration modes with VDCx intermediate voltages

ANA_M

Calib. signals of master chan.

SVDCM

CVDCM -

PSINM, NSINM, PCINM, NCINM

SVDCM

CVDCM -

ANA_S

Calib. signals of segment chan.

SVDCS

CVDCS -

PSINS, NSINS, PCINS, NCINS

SVDCS

CVDCS -

ANA_N

Calib. signals of nonius chan.

SVDCN

CVDCN -

PSINN, NSINN, PCINN, NCINN

SVDCN

CVDCN -

Signal calibration modes with AC noise evaluation (with active sine-square level controlling)

AAC_M

Calib. signals of master chan.

CGUCKM

AAC_S

Calib. signals of segment chan.

CGUCKS

AAC_N

Calib. signals of nonius chan.

CGUCKN

Bias calibration, temperature-sensor calibration, and buffer offset measurement

TWIB

Output of master track via line driver

VTSw

VTth

IBP

TEIB

Output of master track via line driver

VTSe

VTtherr

IBP

TBOS

Output of master track via line driver

BUFFOUT BUFFIN -

Notes

S/D conversion modes with a cyclic conversion, such as 0x08, 0x09, 0x0A, are not permitted during

signal calibration. Cyclic BiSS data requests must also be avoided due to its trigger for sample-and-hold.

Analog calibration signals are output via 4 kΩ source impedance. The maximum permissible signal

frequency is 2 kHz for a load of 200 pF (see Elec. Char. 711, 712)

* Bypass function: inputs (without voltage divider) to outputs, ca. 7 kΩ source impedance

Table 9: Operating modes for analog signal calibration

IC-MN Datasheet(PDF) 21 Page - IC-Haus GmbH

IC-MN Datasheet(HTML) 21 Page - IC-Haus GmbH

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Datasheet Download

Link URL