Datasheet

Table Of Contents

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Hardware Overview

2.2.1 Interface Board: Signal Definitions and Pinouts

This section provides the signal definitions for all XTR108EVM-USB Interface Board connectors.

2.2.1.1 Multimeter Connect

Table 3 shows the signals connected to the Multimeter Connect interface on the Interface Board.

Table 3. Multimeter Connect Pinout

Name Description

HI(F) Voltage and resistance measurement; high-side forced connection

LO(F) Voltage and resistance measurement; low-side forced connection

HI(S) Voltage and resistance measurement; high-side sensed connection

LO(S) Voltage and resistance measurement; low-side sensed connection

I(F) Current output measurement connection

2.2.1.2 J1 (15-Pin Female DSUB)

Table 4 shows the signals connected to J1 on the Interface Board. J1 is the connection for all input and

output signals between the Interface Board and Sensor Board.

Table 4. J1 Pinout (15-Pin Female DSUB)

Pin Name Description

1 SPI_DIO SPI data input/output

2 SPI_SCK SPI clock

3 SPI_CS1 SPI chip select

4 RCM R

(common-mode resistor)

5 RZ R

(zero-scale resistor)

6 RTD RTD resistance

7 IO– Low-side current output from the XTR108

8 IO+ High-side current output from the XTR108

9 VO– Low-side voltage output from the XTR108

10 VO+ High-side voltage output from the XTR108

11 GND Ground

12-15 NC No connection

2.2.1.3 J2 (Vo_XTR108)

Table 5 shows the signals connected to J2 on the Interface Board. J2 is used to connect the voltage

output of an external XTR108 system to the Interface Board.

Table 5. J2 Pinout (Vo_XTR108)

Pin Name Description

1 VO+ High-side voltage output from the XTR108

2 VO– Low-side voltage output from the XTR108

SBOU123–March 2012 XTR108EVM-USB Evaluation Board and Software Tutorial

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