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  • RE: lmc6001B buffer circuit

    Hello Mojtaba, Most likely this is due to the LMC6001 input capacitance and the very high (10G) source impedance causing a simple RC roll-off at the input. 10G // 2pF (the typical input capacitance of the LMC6001) is about -3dB down at 8Hz. And…

  • Recommended ADC + Transimpedance-Amplifier and schematic to measure nanoamps currents

    Other Parts Discussed in Thread: INA190 , PGA281 , LMC6001 , OPA3S328 , OPA392 Hello, I have to find a way to measure the leakage current of GaN or SiC-Mosfets in a HTRB test. These currents are in the range of 15nA to 1mA and therefore the voltages…
    • Answered

  • RE: INA193: INA193, LT1013

    Resolved
    By using LMC6001 model I can see some Oscillations in transient simulation.

  • Why LMC6001A works better than LMC6041A?

    Answer Suggested
    Other Parts Discussed in Thread: LMC6001 , LMC6081 , LMC6041 , LMC660 , LMC662 Dear Experts: according to the datasheets, the input bias current for LMC6001A (typically 10fA) is greater than LMC6041A (typically 2fA), other parameters for these two chips…

  • RE: OPA827: OPA 827

    Hi Timothy, We have general information about input guarding in the datasheets for ultra-low input current op amps. See section 10 in the LMC6001 datasheet as an example. http://www.ti.com/lit/ds/symlink/lmc6001.pdf6001 We have some information…
    • Answered

  • Buffer amp for 50 ohm line

    Resolved
    Other Parts Discussed in Thread: BUF634 , LMC6001 , LMH6672 , OPA551 , TLV4110 , OPA567 I am building an electrometer type circuit, probably using an LMC6001. However, I want the output to drive 50 cable and the LMC6001 does not have enough output current…
    • Resolved

  • TIDA-01063: Rogowski coil for High current pulse measuring

    TI Thinks Resolved
    Part Number: TIDA-01063 Other Parts Discussed in Thread: LMC6001 , UCC21521 , For a defense project, we need to measure a 2500 Amps pulse current with a rise time of 2-3 micro secs. This pulse is produced by discharging a 0.3 uF capacitor charged to…
    • Answered

  • RE: OPA129: Can this device be acquired as an unpackaged die?

    Resolved
    Hi Eric, If 5V is too low and can go up to 15V supply, I would also recommend the LMC6001 (tested to 25fA) or LMC6081 (parent die of LMC6001 and still typically <20fA). Or the LMC6482 if you need R-R input (also typically <20fA).
    • Answered

  • RE: OPA2145: amplifier and other component selection

    Resolved
    Hi Tylor, I have built this circuit with the TL072 many years ago. But any good JFET- or CMOS-OPAmp will do. Is your circuit powered by a bipolar supply voltage? Is the input offset voltage critical? What is the bandwidth? Tylor said: This circuit…

  • RE: Ultra-ultra low input bias current and input capacitance without absurd low-frequency voltage noise?

    Hi Vincent, take a look at the the good LMC6001: 0.13 fA/√Hz, 22 nV/√Hz, Input Current (100% Tested): 25 fA Please not that the inputs should be guarded or air wired to recuce the good performance not with PCB leakage currents, Greetings from…

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