IC-MSB Datasheet, PDF (24/29 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER

iC-MSB^SAFETY, iC-MSB2
SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER
SIGNAL LEVEL CONTROL and SIGNAL MONITORING
Rev D2, Page 24/29
Via the controlled sensor current source (pin ACO)
iC-MSB can keep the output signals for the ensuing
sine/digital converter constant regardless of tempera-
ture and aging effects by tracking the sensor supply.
ADJ (6:5)
Code
00
01
10
11
Adr 0x10, bit 5:4
Function
5 mA - Range
10 mA - Range
25 mA - Range
50 mA - Range
Both the controller operating range and input signal
amplitude for the controller are monitored and can
be enabled for error messaging. A constant current
source can be selected for the ACO output when set-
ting the signal conditioning; the current range for the
highside current source is adjusted using ADJ(6:5).
Table 44: ACO Output Current Range (applies for con-
trol modes and constant current source)
ADJ (4:0)
Code
0x00
0x01
Adr 0x10, bit 3:0; Adr 0x0F, bit 7
Square control ADJ(8:7) = 00
Vpp() ca. 300 mV (60 %)
Vpp() ca. 305 mV (61 %)
...
Vpp()
≈
300
mV
77
77−(1.25∗Code)
0x19
...
0x1F
Vpp() ca. 500 mV (98 %)
...
Vpp() ca. 600 mV (120 %)
Table 45: Vpp Setpoint For Square Control
Figure 6: Signal level monitoring with square control
(example for ADJ(8:0) = 0x19; see Elec.
Char. Nos.607 and 608 regarding Vt()min
resp. Vt()max)
ADJ (8:7)
Code
00
01
10
11
Adr 0x10, bit 7:6
Function
Sine/cosine square control
Sum control
Constant current source
Not permitted (device test only)
Table 43: Controller Operating Modes
ADJ (4:0)
Code
0x00
0x01
Adr 0x10, bit 3:0; Adr 0x0F, bit 7
Sum control ADJ(8:7) = 01
VDC1 + VDC2 ca. 245 mV
VDC1 + VDC2 ca. 249 mV
...
VDC1
+
VDC2
≈
245mV
77
77−(1.25∗Code)
0x1F
VDC1 + VDC2 ca. 490 mV
Table 46: DC Setpoint For Sum Control
ADJ (4:0)
Code
0x00
0x01
Adr 0x10, bit 3:0; Adr 0x0F, bit 7
Constant current source ADJ(8:7) = 10
I(ACO) ca. 3.125% Isc(ACO)
I(ACO) ca. 6.25% Isc(ACO)
...
I(ACO) ≈ 3.125% ∗ (Code + 1) ∗ Isc(ACO)
0x1F
Notes
I(ACO) ca. 100% Isc(ACO)
See Elec. Char. No. 602 for Isc(ACO)
Table 47: I(ACO) With Constant Current Source