SBOA103C
Jan 2006
PGA309 Quick Start
System Reference Guide
72
Note when emulating Diode
temperature control, the Rt
temperature section is not used.
Each channel on the bottom section of the Sensor-
Emulator-EVM represents the output of the
emulated temperature sensor. Using the
Temp
DVM
adjust the respective potentiometers, coarse
first, the fine, to match the values computed by the
Generate_Sim_Values.xls
spreadsheet for
Diode/Cold, Diode/Room, and Diode/Hot. For this
example, the temperature output signal at cold
temperature (-45
o
C) is emulated by this channel.
The rotary switch S2 is used to select this channel.
When the channel is selected, LED D201 will light
to indicate that the correct channel is selected.
This is the
Diode Vo
tab on the
Generate_Sim_Values.xls
spreadsheet.
It is used to compute diode voltages that are
used to set up the Sensor-Emulator-EVM.
For this ratiometric example, adjust the
potentiometer on the Sensor-Emulator-
EVM to the diode temperature section to
product the respective counts shown for
temperature.