IC-MSB Datasheet, PDF (21/29 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 CH1, CH2
Rev D2, Page 21/29
The voltage signals necessary for the conditioning of
channels 1 and 2 can be measured in operation mode
Calibration 2.
Gain Settings CH1, CH2
The gain is set in four stages:
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).
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).
3. Using fine gain factor GF2 the CH2 signal amplitude
is then adjusted to 1 Vpp.
4. The CH1 signal amplitude can then be adjusted to
the CH2 signal amplitude via fine gain factor GF1.
GR12
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
GF2
Code
0x00
0x01
...
0x1F
Adr 0x04, bit 2:0
Range with RIN12=0x9
0.5
1.0
1.3
1.7
2.2
2.6
3.3
4.0
Range with RIN12=0x9
2.0
4.1
5.3
6.7
8.7
10.5
13.2
16.0
Table 30: Gain Range CH1, CH2
Adr 0x04, bit 7:3
Factor
1.00
1.06
GF 2
6.25 31
6.25
Table 31: Fine Gain Factor CH2
0.25 Vp
iC-MSB
Px
0.25 Vp
GF1
Adr 0x06, bit 2:0, Adr 0x05, bit 7:0
Code
Factor
1 Vpp
0x000
1.0
0x001
...
1.0009
GF 1
6.25 1984
0x7FF
6.6245
Table 32: Fine Gain Factor CH1
V_pk(Px)
Nx
R0
V_peak-to-peak
V_pk(Nx)
GND
Figure 5: Definition of 1 Vpp signal. Termination R0
must be high-ohmic during all Test and
Calibration modes.