IC-MSB_17 Datasheet, PDF (24/32 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER

iC-MSB^SAFETY, iC-MSB2
SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER
SIGNAL CONDITIONING CH1, CH2
Rev F3, Page 24/32
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 con-
stant current source for the ACO output set to a suitable
output current (register ADJ; current value close to the
later operating point).
GR12
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Notes
2. The coarse gain is selected so that the differential
signal amplitudes of approx. 1 Vpp are produced (signal
Px vs. Nx, see Figure below).
3. Using fine gain factor GF2 the CH2 signal amplitude _GF2
is then adjusted to 1 Vpp.
Code
4. The CH1 signal amplitude can then be adjusted to ^0x00
the CH2 signal amplitude via fine gain factor GF1.
0x01
...
0x1F
Adr 0x04, bit 2:0
Factor
2.0
4.1
5.3
6.7
8.7
10.5
13.2
16.0
The effective total gain calculates as:
G12_eff = GFx x GR12, respectively
G12_eff = 1/4 x GFx x GR12
if using the input voltage divider (RIN12 = 0x9).
Table 30: Gain Range CH1, CH2
Adr 0x04, bit 7:3
Factor
1.00
1.06
GF2
6.25 31
6.25
Table 31: Fine Gain Factor CH2
GF1
Code
0x000
0x001
...
0x7FF
Adr 0x06, bit 2:0, Adr 0x05, bit 7:0
Factor
1.0
1.0009
GF1
6.25 1984
6.6245
Table 32: Fine Gain Factor CH1
Figure 7: Definition of 1 Vpp signal. Termination R0
must be high-ohmic during all Test and
Calibration modes.