iC-MSBSAFETY, iC-MSB2
SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER
Rev D2, Page 21/29
SIGNAL CONDITIONING CH1, CH2
GR12
Code
0x0
Adr 0x04, bit 2:0
The voltage signals necessary for the conditioning of
channels 1 and 2 can be measured in operation mode
Calibration 2.
Range with RIN12=0x9
Range with RIN12=0x9
0.5
1.0
1.3
1.7
2.2
2.6
3.3
4.0
2.0
0x1
4.1
0x2
5.3
Gain Settings CH1, CH2
The gain is set in four stages:
0x3
6.7
0x4
8.7
0x5
10.5
13.2
16.0
1. The sensor supply tracking is shut down and the
constant current source for the ACO output set to a
suitable output current (register ADJ; current value
close to the later operating point).
0x6
0x7
Table 30: Gain Range CH1, CH2
2. The coarse gain is selected so that the differential
signal amplitudes of ca. 1 Vpp are produced (signal Px
vs. Nx, see Figure below).
GF2
Code
0x00
0x01
...
Adr 0x04, bit 7:3
Factor
1.00
3. Using fine gain factor GF2 the CH2 signal amplitude
is then adjusted to 1 Vpp.
1.06
6.25GF2
31
0x1F
6.25
4. The CH1 signal amplitude can then be adjusted to
the CH2 signal amplitude via fine gain factor GF1.
Table 31: Fine Gain Factor CH2
GF1
Adr 0x06, bit 2:0, Adr 0x05, bit 7:0
Code
0x000
0x001
...
Factor
1.0
0.25 Vp
0.25 Vp
1 Vpp
1.0009
GF1
1984
6.25
0x7FF
6.6245
iC-MSB
Px
Table 32: Fine Gain Factor CH1
Vpeak-to-peak
R0
Vpk(Px)
Nx
Vpk(Nx)
GND
Figure 5: Definition of 1 Vpp signal. Termination R0
must be high-ohmic during all Test and
Calibration modes.
ICHAUS [ IC-HAUS GMBH ]
