User manual

Copyright © 2005, ZMD AG, 2005-05-17 6/8
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ZMD31050
Advanced Differential Sensor Signal Conditioner
Application Note PRELIMINARY
now. New calibration is ready and result can be verified now.
• Measure VOUT for top and bottom position of the poti.
You should measure 0.5V for poti down end 4.5V for poti top end now.
• Repeat the same procedure with reverse acquiring (pressing P2M instead P1M and otherwise).
You will get a mirrored output function for this case. We see, the output signal can be inverted by
calibration for the same input signal.
3. ZMD31050 Software Description
Main window is split in 8 frames:
• “ASIC-Configuration” configures memory access. Configuration data can be written into RAM or
EEPROM. All modifications can be done in and activated from RAM. Write new configuration into
EEPROM, if changes should be made non-volatile. To do this, ZMD recommends to write first all
data into RAM and then copy into EEPROM by pressing “RAM->EEP” button. The “LED” indicates
whether the displayed information in software are identical to ZMD31050 circuit or not.
• “Bridge Sensor Adaptation” enables config of basic “Sensor Design-In” and “ADC” parameters
• “Temperature Sensor Adaptation” enables configuration of temperature measurement for
conditioning (T1) and additional temperature measurement
• “Output, IO-Configuration” configures analogue and PWM output and IO channel
• “Application/Adjust” configures supply voltage regulator, safety feature, bandgap voltage and TC.
Additional clock frequency and biasing can be adapted/modified.
• “Interface & Board Version” is used to select interface type, board and addressing.
• “Commands” enables to start signal conditioning using RAM or EEPROM data. Enabled
“Command Mode” can be verified and is displayed by a green flashing “LED”.
• “ReadOut Data” enables digital readout via serial communication interface (SIF). If continuous
readout is activated averaging mode can be enabled. Via the SIF can be read output data for
pressure and temperature 1 & 2 channel. A description of data is displayed beside the output fields.
Info line enables to add a short description of application to configuration data. Additional in status line
is displayed revision number of accessed ZMD31050 circuit. Refer detailed software description for
further information and examples.