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SBOA103C
Jan 2006
PGA309 Quick Start
System Reference Guide
33
1.
Offset and Span: Generates the bridge output voltages.
2.
Diode Vo: Generates the temperature sensor output voltages for the diode method.
3.
Rt-: Generates the temperature sensor voltages for the Rt- method.
4.
Rt+: Generates the temperature sensor voltages for the Rt- method.
5.
PGA309 Error: Allows you to read the PGA309 via the ADS1100 (The ADS1100 is the
delta-sigma A/D converter that is a part of the PGA309EVM-xx).
6.
PGA309 RatioMetric Error: Allows you to read and compute error for a ratiometric PGA309
setup.
If the raw output of the sensor is not known, the “Generate_Sim_Values.xls” spreadsheet can be used to
translate the specifications of your bridge sensor and temperature sensor to system voltage levels. The
spreadsheet contains five sections (Offset and Span, Diode Vo, Rt-, Rt+, PGA309 Error, Ratiometric Error):
The temperature measurement methods, Diode, Rt-, and Rt+ are described in detail in the Sensor-
Emulator-EVM System Reference Guide (SBOA102) and the PGA309 Users Guide (SBOU024).
Configuring the Emulator to
Emulate a Real World Sensor