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ADS1263: for 40PC150G2A (Pressure sensor)

Art Mecina
Genius 16505 points
Part Number: ADS1263
Other Parts Discussed in Thread: ADS1262,

Hello Guys,

Good day.

Our customer is using 40PC150G2A (Pressure sensor), honeywell for sensing pressure. They are looking for an ADC best suited for their application.  are upgrading our gas chromatography machine. They need : 0.1 kPa (0.001 psi) resolution, Max 150 psi and accuracy of < ± 2.0 % (full scale).

They have initially bought  ADS1263IPW for this application. Is this suitable for the said sensor? See below.

40PC_Series_Pressure_Sensor_Honeywell.pdf

Thanks and regards,

Art

  • 0
    TI__Mastermind 34991 points

    Hi Art,

    Yes, the ADS1263 could be used for this application, and is used by other engineers for gas chromatography applications. The ADS1263 has 2x ADCs inside (a 32-bit and a 24-bit), while the ADS1262 only has a 32-bit ADC. If they do not need both ADCs, they could always use the ADS1262.

    The accuracy targets, etc., would depend on the speed they want to sample and the excitation voltage they use for the pressure sensor.

    -Bryan

  • 0 in reply to Bryan Lizon86
    TI__Genius 16505 points

    Hi Bryan,

    Thanks for the answer. Below are the response from the customer.

    "Our team is working on Pressure & is designing circuit based on ADS1263. For pressure control we were using DAC then Opam based buffer and then transistor to control radiometric valve of 300 ohms. Can we minimize this circuit by your semiconductor?

    We Need one more help from your team. Can we get a reference design of 4-Wire PT100 and ADS1262 considering excitation current, resistance calculation, precision and least noise.?"

    Thanks and regards,

    Art

  • 0 in reply to Art Mecina
    TI__Mastermind 34991 points

    Hi Art,

    I don't think the ADS1263 could be used a substitute for the pressure control circuit, unless they can use one of the ADC's current sources to control the sensor. However, the IDAC output value step size is fairly coarse so I am not sure how useful they would be for precision sensor control. The IDACs are intended to be used in a ratiometric configuration however. I would refer them to section 9.3.11 in the ADS1263 datasheet for more information on the IDAC functionality so they can determine if these integrated IDACs will work in their system.

    For the RTD question, please refer them to our RTD cookbook: https://www.ti.com/lit/an/sbaa275/sbaa275.pdf

    -Bryan