Datasheet
Table Of Contents
- XTR108EVM-USB Evaluation Board and Software Tutorial
- 1 Overview
- 2 Hardware Overview
- 3 Hardware Setup
- 3.1 Electrostatic Discharge Warning
- 3.2 Connecting the Hardware
- 3.3 Connecting Power and USB to the USB DAQ Platform
- 3.4 Connecting Loop Power Supply to the XTR108EVM-USB Interface Board
- 3.5 Connecting Outputs to a Digital Multimeter (DMM)
- 3.6 USB DAQ Platform Default Jumper Settings
- 3.7 XTR108EVM-USB Interface Board Default Jumper Settings
- 3.8 XTR108EVM-USB Sensor Board Default Jumper Settings
- 4 Software Setup
- 5 Software Overview
- 6 General Operating Tips
- 7 Hardware Documentation
- 8 Appendix
- Important Notices
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Hardware Overview
2.3.2 Sensor Board Jumper Settings
Table 17 explains the function of the XTR108EVM-USB Interface Board jumpers.
Table 17. Sensor Board Jumper Functions
Jumper Default Description
This jumper selects whether to enable or bypass the depletion-mode transistor Q1.
JMP1 FET Set the jumper to the FET position when using current-output mode. Set the jumper to the
BYPASS position when using voltage-output mode.
This jumper selects whether to enable or bypass the depletion-mode transistor Q1.
JMP2 FET Set the jumper to the FET position when using current-output mode. Set the jumper to the
BYPASS position when using voltage-output mode.
This jumper selects between current-output mode or voltage-output mode.
JMP3 IOUT Set the jumper to the IOUT position when using current-output mode. Set the jumper to the
VOUT position when using voltage-output mode.
This jumper selects whether to connect or disconnect a load resistor (R
L
, not installed by
default) from the voltage output of the XTR108.
JMP4 NO LOAD
Set the jumper to the NO LOAD position when using current-output mode. Set the jumper to
the LOAD position when using voltage-output mode (optional).
This jumper selects between the current-output or voltage-mode charge pump input at the
XTR108 I_IN pin.
JMP5 IOUT
Set the jumper to the IOUT position when using current-output mode. Set the jumper to the
CP position when using voltage-output mode.
This jumper enables or disables the SPI clock buffer in the voltage-output mode charge pump.
JMP6 BYPASS Set the jumper to the BYPASS position when using current-output mode. Set the jumper to
the BUF position when using voltage-output mode.
This jumper enables or disables the voltage-output mode charge pump.
JMP7 NO CLK Set the jumper to the NO CLK position when using current-output mode. Set the jumper to the
CP SCK position when using voltage-output mode.
This jumper selects what type of RTD is connected to the XTR108.
Set the jumper to the 2-WIRE position when using the RTD emulator on the Interface Board
JMP8 2-WIRE
or when connecting an external two-wire RTD. Set the jumper to the 3-WIRE position when
connecting an external three-wire RTD.
15
SBOU123–March 2012 XTR108EVM-USB Evaluation Board and Software Tutorial
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