IC-GD datasheet(20/55 Pages) ICHAUS

20 / 55 page

prel

imin

ary

prel

imin

ary

iC-GD

UNIVERSAL I/O INTERFACE

Rev A1, Page 20/55

Measuring ranges

Range

Maximum ratings Digital values

Valid Range

±10 V

-10.5000 V

0x8000

0x8619 . . . 0x79E7

10.4997 V

0x7FFF

±1 V

-1.05000 V

0x8000

0x8619 . . . 0x79E7

1.04997 V

0x7FFF

±100 mV

-105.000 mV

0x8000

0x8619 . . . 0x79E7

104.997 mV

0x7FFF

±10 mV

-10.5000 mV

0x8000

0x8619 . . . 0x79E7

10.4997 mV

0x7FFF

-17.5 mV. . . 87.5 mV

-17.5 mV

0x8000

0x8000 . . . 0x7FFF (*)

(thermo couples JKTNE)

87.498 mV

0x7FFF

-4.375 mV. . . 21.875 mV

-4.375 mV

0x8000

0x8000 . . . 0x7FFF (*)

(thermo couples RSB)

21.8747 mV

0x7FFF

±20 mA

-21 mA

0x8000

0x8619 . . . 0x79E7

20.999 mA

0x7FFF

4. . . 20 mA

-13 mA

0x8000

0x0000 . . . 0x7878

4 mA

0x0000

20.999 mA

0x7FFF

Table 5: Measurement ranges of the analog inputs

Accuracy of measuring ranges

25 °C -40...100 °C -40...120 °C

±10 V

5.25 mV

21 mV

42 mV

±1 V

0.525 mV

2.1 mV

4.2 mV

±100 mV

52.5 µV

210 µV

420 µV

±10 mV

5.25 µV

21 µV

42 µV

-17.5 mV. . . 87.5 mV

26.25 µV

105 µV

210 µV

-4.375 mV. . . 21.875 mV

6.56 µV

26.25 µV

52.5 µV

Table 6: Accuracy of the measurement ranges depending on chip temperature

Analog outputs (UPx, UNx, IAx)

The positive voltage outputs UPx are current-limited

and switch off, when overtemperature limit T2 is ex-

ceeded. If the temperature exceeds overtemperature

limit T1, the output is only disconnected, if it reports an

overload at the same time.

An extended current mode provides increased current

capability of up to +20 mA.

All negative voltage outputs UNx contain a 25 mA cur-

rent source that only switches off in case of overload

and when exceeding the upper overtemperature limit

T2.

When the short-circuit output current is reached, a

seperate error bit is set for each of the states low and

high. An overload is reported when the output voltage

deviates from the set point by more than 1 V, since a

short circuit can occur anywhere in the entire output

voltage range.

In combination with an external resistor and the voltage

measurement (Mixed Mode), the current outputs IAx

can be extended for a resistance measurement. The

measuring ranges and tolerances are the same as for

the individual functions. The minimum supply voltage

VB = 14.5 V and the saturation voltage hi at the output

IAx result in a maximum load of 600 Ω for 20 mA current

output.

By reaching the upper dynamic range, a high-

impedance load or open wire at IAx or UIx during a

3-wire measurement can be detected. This is indicated

by the relevant error bits. For this functionality, at least

one output current of -10 mA must be set. If an NTC or

PTC resistance is used for temperature measurement,

the linearization and calibration must be carried out

externally.

IC-GD датащи(PDF) 20 Page - IC-Haus GmbH

IC-GD датащи(HTML) 20 Page - IC-Haus GmbH

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

датащи скачать

ссылки URL