IC-MSB_17 Datasheet, PDF(27/32 Page) IC-Haus GmbH

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IC-MSB_17 Datasheet, PDF (27/32 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER

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iC-MSBSAFETY, iC-MSB2

SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER

SIGNAL LEVEL CONTROL and SIGNAL MONITORING

Rev F3, Page 27/32

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.

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 setting the

signal conditioning; the current range for the highside

current source is adjusted using ADJ(6:5).

ADJ (6:5)

Code

Adr 0x10, bit 5:4

Function

5 mA - Range

10 mA - Range

25 mA - Range

50 mA - Range

Table 43: ACO Output Current Range (applies for con-

trol modes and constant current source)

ADJ (8:7)

Code

Adr 0x10, bit 7:6

Function

Sine/cosine square control

Sum control

Constant current source

Not permitted (device test only)

Table 44: ACO Output Control Mode

Note: Excessive input signals or internal signal clipping

can interfere control operation, so that the preset operating

point may not be reached (upon power up) or maintained

(upon disturbances). Use Control Error 2 and Signal Error 1

for monitoring and configure EMASKA accordingly.

ADJ (4:0)

Code

0x00

0x01

...

0x19

...

0x1F

Adr 0x10, bit 3:0; Adr 0x0F, bit 7

Square control ADJ(8:7) = 00

Vpp() approx. 300 mV (60 %)

Vpp() approx. 305 mV (61 %)

...

300

77â(1.25âCode)

Vpp() approx. 500 mV (98 %)

...

Vpp() approx. 600 mV (120 %)

Table 45: Setpoint Square Control (internal sin/cos sig-

nal amplitude)

In operation with the active square control mode

ADJ(4:0) sets the internal signal amplitudes accord-

ing to the relation (PCH1-NCH1)2 + (PCH2-NCH2)2;

these should be set to 0.25 Vpk.

Figure 8: Internal signal monitoring and test sig-

nals in Calibration 2 mode (example for

ADJ(8:0) = 0x19);

Signal monitoring and limits

ADJ (4:0) Vt()min ... max ADJ (4:0) Vt()min ... max

0x00

120 mV...390 mV 0x19

200 mV ...650 mV

0x01

122 mV...397 mV ...

...

0x1F

240 mV...780 mV

Notes

All values nominal, see also Elec. Char. Nos. 607,

608

Table 46: Signal Monitoring

The signal monitoring limits are tracked according to

ADJ (4:0) and fit for square control mode. When using

sum control mode a different operating point can be

required for which the monitoring limits may not be suit-

able. In this case signal monitoring should be disabled

via the error mask (see EMASKA etc.).

ADJ (4:0)

Code

0x00

0x01

...

0x1F

Adr 0x10, bit 3:0; Adr 0x0F, bit 7

Sum control ADJ(8:7) = 01

VDC1 + VDC2 approx. 245 mV

VDC1 + VDC2 approx. 249 mV

...

245mV

77â(1.25âCode)

VDC1 + VDC2 approx. 490 mV

Table 47: Setpoint Sum Control (DC value)

ADJ (4:0)

Code

0x00

0x01

...

0x1F

Notes

Adr 0x10, bit 3:0; Adr 0x0F, bit 7

Constant current source ADJ(8:7) = 10

I(ACO) approx. 3.125% Isc(ACO)

I(ACO) approx. 6.25% Isc(ACO)

... â 3.125% â (Code + 1) â Isc(ACO)

I(ACO) approx. 100% Isc(ACO)

See Elec. Char. No. 602 for Isc(ACO)

Table 48: Setpoint Current Source (ACO output cur-

rent)

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