IC-MSB Datasheet, PDF (23/29 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER

iC-MSB^SAFETY, iC-MSB2
SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER
SIGNAL CONDITIONING CH0
Rev D2, Page 23/29
The voltage signals needed to calibrate channel 0 are
available in Calibration Mode 1.
Gain Settings CH0
Parallel to the conditioning process for the CH1 and
CH2 signals the CH0 gain is set in the following stages:
1. The sensor supply tracking unit is shut down and the
constant current source for the ACO output set to the
same output current as in the compensation of CH1
and CH2 (register ADJ; current value close to the later
operating point).
Offset Calibration CH0
To calibrate the offset the source of supply must first
be selected using VOS0 (see Offset Calibration CH1
and CH2 for further information). For the CH0 path the
dependent source VDC is identical to source VDC1.
VOSZ
Code
0x0
0x1
0x2
0x3
Adr 0x13, bit 5:4
Source
0.05 · V(ACO)
0.5 V
0.25 V
VDC (ie. VDC1)
2. The coarse gain is selected so that a differential sig-
nal amplitude of ca. 1 Vpp is produced internally (sig-
nal PCHx versus NCHx).
3. GF0 then permits fine gain adjustment to 1 Vpp.
GR0
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Adr 0x11, bit 2:0
Range with RIN0=0x9
0.5
1.0
1.3
1.7
2.2
2.6
3.3
4.0
Range with RIN0=0x9
2.0
4.1
5.3
6.7
8.7
10.5
13.2
16.0
Table 38: Gain Range CH0
GF0
Code
0x00
0x01
...
0x1F
Adr 0x11, bit 7:3
Factor
1.00
1.06
GFZ
6.25 31
6.25
Table 40: Offset Reference Source CH0
OR0
Code
0x0
0x1
0x2
0x3
Adr 0x12, bit 1:0
Range
x1
x2
x6
x12
Table 41: Offser Range CH0
OF0
Code
0x00
0x01
...
0x1F
Adr 0x12, bit 7:2
Factor
0
0.0322
0.0322 · OFZ
1
Code
0x20
0x21
...
0x3F
Factor
0
-0.0322
-0.0322 · OFZ
-1
Table 42: Offset Factor CH0
Table 39: Fine Gain Factor CH0