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

    Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: OPA928 , OPA928EVM Hi, I'm working on a sensor application using a photodiode connected to a transimpedance amplifier with a 5 Gigaohm feedback resistor. Read Paul Grohe's 2011 series of articles…
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  • LMP7721: LMP7721

    TI Thinks Resolved
    Part Number: LMP7721 I am using this LMP7721 schematic as T ransimpedance amplifier, so is this circuit is OK for I to V convertor or any other changes need to be done?

  • LMP7721: LMP7721

    TI Thinks Resolved
    Part Number: LMP7721 Hi, In one of our new instrument development, we are using LMP7721 as precision amplifier. We are planning to use an electrode/ biosensor and LMP7721 as potentiostatic circuit. Could you confirm that LMP7721 will be suitable for…
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  • LMP7721: Clarification on CMVR, PSRR, and CMRR. How do these parameters tell me what combinations of supply voltages to use?

    Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI Apologies in advance if these are mundane specs or queries… I have only briefly worked with ideal op-amp theory in the past (roughly 4+ years ago). If my following queries should be on a separate…
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  • RE: LMP7721: How to get Hspice model for this LMP7721 part?

    Running this model with afs (HSPICE compatible simulator) gives below SIM_ERRORs: * Version: AFS 64-bit (2017.3 : 2017-09-19) * * Build date: Tue Sep 19 07:53:13 PDT 2017 * ***** Command-Line Options afs -i PCM_sim.afs -f fsdb 'parhier=global'. Global…

  • LMP7721: TINA-TI simulation

    TI Thinks Resolved
    Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI Hi Team, Our customer is simulated LMP7721 in TINA-TI for an electrometer application and would like to confirm if the simulation result is correct. According to our customer, I am using…
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  • 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…
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    • 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…
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  • 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…
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  • 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…
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