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  • LMP91200: Oscillation on VOCM output

    TI Thinks Resolved
    Part Number: LMP91200 Other Parts Discussed in Thread: ADS124S08 Hi I have designed pH measuring device. It is 4-20mA loop powered, isolated using flyback converter. It has STM32, ADS124S08 as ADC and LMP91200 as front end. All running on 3.3V. Vref …

  • LMP91200: maximum input voltage

    TI Thinks Resolved
    Part Number: LMP91200 Hi I see this post: https://e2e.ti.com/support/amplifiers/f/amplifiers-forum/657381/lmp91200-orp-sensing-using-lmp91200-ic Which kind of suggests the input voltage is ±500mV around VCM. But this is for device switched off only isn…

  • RE: LMP91200: Have problem with LMP91200

    Hi Gordon Varney . Thanks you for your support during i'm facing with my problem. I'm will make new PCB and replace connector with BNC and test again. If i have same problem, i will come back Thanks and best regards.
    • Answered

  • LMP91200: Resistance value

    Resolved
    Part Number: LMP91200 Hi team, A customer inquired about the internal resistance of LMP91200. These two resistors are not described in the datasheet. Are the two resistors equal? Can you find its value
    • Resolved

  • LMP91200: Using several LMP91200 in one design

    TI Thinks Resolved
    Part Number: LMP91200 Other Parts Discussed in Thread: INA121 Hello! I am developing 4-channel ion meter, and plan using LMP91200 for it. The question is - how to connect 4 parts to have one common VCM output for single reference electrode and 4 ion electrodes…
    • Answered

  • LMP91200: Faulty VOCM and VOUT signal, seems random

    Resolved
    Part Number: LMP91200 Other Parts Discussed in Thread: REF3120 , , REF3220 Hello, I have a weird problem where both the VOCM and VOUT signal seems completely random, single-ended and differential. The differential can range from -0,55 - 0,2 when I'm measuring…
    • Resolved

  • RE: LMP91200: pH electrode

    Gama - do you have part # of the probe and also, in looking through this, can you clarify please if your hardware is LMP7721 based only or also you have LMP91200 based hardware?

  • LMP91200: RTD interface

    TI Thinks Resolved
    Part Number: LMP91200 Hi Team, In the revision history of the datasheet of LMP91200, the temperature sensor function was deleted. A customer is looking for the RTD function of this device. I have checked our signal conditioner's product page but this…

  • LMP91200: pH sensor only has two wires, no third conductor - how to connect it to a guard?

    TI Thinks Resolved
    Part Number: LMP91200 If the pH sensor only has two wires which I will connect to INP and VCOM what do I connect the guard to? There is not a third conductor in the pH sensor cable.
    • Answered

  • LMP91200: What about SPI and RTD senspr in this part?

    Resolved
    Part Number: LMP91200 Hello! Currently the product folder of LMP91200 shows a datasheet with no SPI and RTD connection. The early datasheet (for example https://www.mouser.com/datasheet/2/282/lmp91200-20707.pdf ) contains this pins, and part number nor case…
    • Resolved

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