IC-MSA Datasheet, PDF (23/29 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER with AGC and 1Vpp DRIVER

iC-MSA SIN/COS SIGNAL
preliminary
CONDITIONER with AGC and 1Vpp DRIVER
SIGNAL CONDITIONING CH0
Rev A1, Page 23/29
The voltage signals needed to calibrate channel 0 are
available in Calibration Mode 1.
Gain Settings CH0
The CH0 gain is set in the following stages:
1. Adjust CH1 and CH2.
GC0
Code
0x00
0x01
...
0x80
...
0xFE
0xFF
Addr 0x50, bit 7:0
Ratio
0.8292
0.8304
GC0−128
20 2047
1.00
GC0−128
20 2047
1.2025
1.2043
2. Set gain range GR0 to the same value as GR12.
Table 34: Gain Correction Ratio CH0/CH1
3. GC0 then permits fine gain ratio adjustment relative
to CH1.
GR0
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Addr 0x51, bit 2:0
AGC on (AGCOFF = 0)
0.20 .. 2.77
0.34 .. 4.69
0.51 .. 7.03
0.71 .. 9.82
1.01 .. 13.8
1.28 .. 17.7
1.68 .. 23.2
2.11 .. 29.1
AGC off (AGCOFF = 1)
0.75
1.27
1.89
2.65
3.73
4.77
6.24
7.83
Table 32: Gain Range CH0 with voltage divider inputs
(RIN0=0x9)
GR0
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Addr 0x51, bit 2:0
AGC on (AGCOFF = 0)
0.80 .. 11.1
1.36 .. 18.8
2.04 .. 28.1
2.85 .. 39.3
4.02 .. 55.4
5.14 .. 70.8
6.73 .. 92.6
8.44 .. 116
AGC off (AGCOFF = 1)
2.98
5.06
7.58
10.6
14.9
19.1
25.0
31.3
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).
VOS0
Code
0x0
0x1
0x2
0x3
Addr 0x53, bit 5:4
Source
0.05 · V(VDDS)
0.5 V
0.25 V
not permitted
Table 35: Offset Reference Source CH0
OR0
Code
0x0
0x1
0x2
0x3
Addr 0x52, bit 1:0
Range
x1
x2
x6
x12
Table 36: Offset Range CH0
OF0
Code
0x00
0x01
...
0x1F
Addr 0x52, bit 7:2
Factor
0
+ 0.0322
+ OF0 /31
+1
Code
0x20
0x21
...
0x3F
Factor
0
− 0.0322
− (OF0 - 32 ) /31
−1
Table 33: Gain Range CH0 (RIN0=0x9)
Table 37: Offset Factor CH0