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PGA309 question of EVM

PAN-M
Mastermind 8375 points
Other Parts Discussed in Thread: PGA309

Dear all

Our customer have some question about EVM.
Please see attached file.

Regards,
PAN-M3527.PGA309＆EVM_question.xlsx

  • 0
    TI__Mastermind 27715 points

    Hello PAN-M,

    This version of the PGA309EVM software is unsupported. Please have the customer download the new version at this link: http://www.ti.com/lit/zip/sboc320. The current version is much simpler to use and is fully documented in the PGA309EVM-USB User's Guide.

    We use the 24LC16B from Microchip on the PGA309EVM, but most I2C-compatible EEPROM with 2Kx8 memory size will work with the PGA309.

    On the EVM, data is written to the EVM by an I2C transaction initiated by the one-wire interface. See Section 4.7 of the PGA309 User's Guide for more information on this method. When not using the EVM, we recommend using the same method.

    Best regards,

    Ian Williams
    Linear Applications Engineer
    Precision Amplifiers - Op Amps

  • 0 in reply to Ian Williams
    Mastermind 8375 points

    Ian-san

    Our customer read the following documents.
    http://www.tij.co.jp/jp/lit/ug/sbou084a/sbou084a.pdf
    They have some question.
    There are two methods, One is a sensor emulator function is used, and other is  the calibration of the real sensor is carried out under load or temperature environment.
    Is it satisfactory by use an emulator function?
    Do you have the detail procedure in the case of emulator?
    ("a MODELFILE creation by SetupCAL tab => write to EEPROM by RunSENSORemulator button"?)

    How many pieces can input the Row data? (Section 4.14)
    Is it to three pieces?
    Our customer wants to do more inputs.

    Regards,
    PAN-M

  • 0 in reply to PAN-M
    TI__Mastermind 27715 points

    Hello PAN-M,

    Typically the sensor emulator function is used to perform a quick calibration of the PGA309 for evaluation purposes only. Once an actual sensor module product is designed and built by the customer, a real sensor signal will be applied over pressure and temperature for calibration prior to production. 

    I've attached a PowerPoint presentation showing how to set up and perform a calibration for 4-wire voltage output mode. This should help familiarize you with the general process for using the PGA309EVM. 

    When creating a sensor emulator file, you can use more than 3 rows/temperature inputs. However, most bridge sensors have 2nd-order nonlinearity over temperature and pressure, and the PGA309 is designed to best calibrate this kind of nonlinearity. Therefore, 3 points can be used to fully define that kind of sensor. If you do increase the number of points to greater than 3, I recommend leaving the "Poly Order" input at 2.

    Best regards,

    Ian Williams

    PGA309 Setup - 4W, Vout.ppt