IC-MQF Datasheet, PDF (25/37 Pages) IC-Haus GmbH – PROGRAMMABLE 12-BIT Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MQF PROGRAMMABLE 12-BIT ^preliminary
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
SIGNAL CONDITIONING CH0
Rev A1, Page 25/37
The voltage signals needed to calibrate the zero chan-
nel are available in mode Calibration 1. The relative
phase position of the ungated zero signal Zin com-
pared to A and B can be determined in mode System
Test.
Offset Calibration CH0
The offset reference source is selected with VOS0.
The offset compensation is set with OR0 and OF0 (see
Offset Calibration CH1 and CH2 for further informa-
tion).
Gain Settings CH0
The CH0 gain is set in the following steps:
1. The sensor supply controller is shut down and the
constant current source for the ACO output is set to
the same values as during the calibration of CH1 and
CH2 (registers ACOT, ACOR and ACOS).
2. The coarse gain is selected so that a differential sig-
nal amplitude of ca. 1 Vpp is produced internally (sig-
nal PCH0 versus NCH0).
3. GF0 then permits fine gain adjustment to 1 Vpp. The
total gain is accrued from GR0 x GF0.
GR0
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Addr 0x07, bit 6:4
Range R0 = 0x9
0.5
1.0
1.3
1.7
2.2
2.6
3.3
4.0
Range R0 = 0x9
2.0
4.1
5.3
6.7
8.7
10.5
13.2
16.0
Table 27: Gain Range CH0
VOS0
Code
0x0
0x1
0x2
0x3
Addr 0x04, bit 5:4
Source
0.05 · V(ACO)
0.5 V
0.25 V
VDC1
Table 29: Offset Reference Source CH0
OR0
Code
0x0
0x1
0x2
0x3
Addr 0x07, bit 1:0
Range
x1
x2
x6
x12
Table 30: Offset Range CH0 (coarse)
OF0
Code
0x00
0x01
...
0x1F
Addr 0x09, bit 5:0
Factor
0
0.0322
+ Code /31
1
Code
0x20
0x21
...
0x3F
Factor
0
− 0.0322
− (Code - 32 ) /31
−1
Table 31: Offset Factor CH0 (fine)
GF0
Code
0x00
0x01
...
0x1F
Addr 0x08, bit 4:0
Factor
1.00
1.06
GF 0
6.25 31
6.25
Table 28: Fine Gain Factor CH0