Search tips
Showing 236 results View by: Thread Post Sort by
    Answered

  • LMP7721: Output drift

    Resolved
    Part Number: LMP7721 Hi I am using the LMP7721 as the input stage to a circuit used to measure electrostatic charge. The amplifier is configured such that the Voltage Supply rails are +/- 2.5V The remaining connections are thus; Theory of operation is…
    • Resolved

  • LMP7721: LMP7721 Split supplies configuration

    TI Thinks Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI Hi I'd like to use the LMP7721 in a split supply configuration eg V = +2.5V and V- = -2.5V Will this work ok and what negative impact on performance can I expect...? Note - I tried using…
    • Answered

  • RE: LMP7721: Transimpedance amplifier - Question about layout, guard and copper pours

    Resolved
    Hi Alan, Sounds good, I'll go ahead and close this thread for now. Feel free to reach out if you need further support on your design. Best Regards, Zach
    • Answered

  • RE: LMP7721: Why isn't solder mask covered inside the guard trace?

    Resolved
    Hi Marek, Thank you for your reply. Best Regards

  • RE: LMP7721: LMP7721

    Hi Ayodhya, Ayodhya Weerakoon said: Recently I diagnosed that with the temperature of the IC the reading varies. Can you give a number? Please specify how much the reading varies. Is the voltage variation higher than the maximum temperature drift of LM4140…
    • Answered

  • RE: LMP7721: LMP7721 TIA design issues: Lost linearity (>1mA), oscillations (<10 nA)

    Resolved
    There is no easy way to measure 1nA change with 250ohm TIA as this implies 250nV resolution - see below. Changing the input current by 1nA from 1mA to 1.000,001mA would require resolution way below the input voltage noise of LMP7721. Simulating the input…
    • Answered

  • LMP7721: How to build a charge amplifier with fC resolution and low bandwidth?

    Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI , OPA210 , OPA928 , OPA928EVM Hello, I am not an electrical engineer but a chemical one. Therefore, my question is probably foolish/basic. I would like to build a circuit that is able to measure…
    • Resolved
    • Answered

  • LMP7721: Can I supply bias voltage to input without buffer?

    Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: INA321 , TINA-TI Hi ti, I'm designing trans-impedance amplifier with LMP7721. In my application, the circuit need voltage bias to input. The circuit is below. In the simulation, the voltage…
    • Resolved
    • Answered

  • LMP91000: LMP91000 & LMP7721

    Resolved
    Part Number: LMP91000 Other Parts Discussed in Thread: LMP7721 Hello, I have Some Questions related 4 Electrodes Gas Sensor. Currently, I am working with LMP91000 & LMP7721. LMP91000 Configuration: ( WE,CE and RE ) VREF DIVIDER = 50% RTIA = 14K Rload…
    • Resolved
    • Answered

  • LMP7721: Input noise prevention for trans-impedance amplifier

    Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: TLV9161 Hi, team. I'm designing a trans-impedance amplifier using the LMP7721. The C2 and IG1 is a model of sensor. The sensor output is about 0.1~10 nA AC current. The constant bias of 1.2 …
    • Resolved

Didn't find what you are looking for? Post a new question.