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  • OPA818: OPA818 Layout

    TI Thinks Resolved
    Part Number: OPA818 Regarding the input signal layout, the datasheet states the following: “To reduce this unwanted capacitance, a plane cutout around and underneath the signal I/O pins on all ground and power planes is recommended.” We are designing…

  • OPA818: Looking High Bandwidth Current Sense Solution with Alert Function (Similar to OPA818)

    Part Number: OPA818 Hi experts, Referring to the thread: Recommend Solution for Fast Transient Current Monitoring, customer has tested OPA818 and it generally looks good. Now they are looking for a solution similar to the OPA818 with a bandwidth around…
    • Answered

  • OPA818: What is the package capacitance between adjacent pins of OPA818 ?

    Resolved
    Part Number: OPA818 Tool/software: Hi can you possibly let me know the expected capacitance between the feedback and inverting input (pins 2 & 3) of this part? I am using it as a TIA and at higher trans-impedance levels it will effect bandwidth.
    • Resolved

  • OPA818: Unexpected DC offset that doesn't match datasheet

    Part Number: OPA818 Hi TI support. I've been getting some unexpected DC offsets from your part when using your part as a 7.5Meg TIA. For testing we also add a 7.5Meg resistor from inverting input to ground so non inverting gain is x2. What we see on…
    • Answered

  • OPA818: Stability when Calibrating OPA818 as a TIA

    Resolved
    Part Number: OPA818 Tool/software: Hi I have an OPA818 application with OPA818 configured as a 9M TIA with a small amount of capacitive feedback to give -3dB transimpedance at 1MHz. For testing I drive it fr om a signal generator via a 9M resistor so…
    • Resolved

  • OPA818DRGEVM: OPA818 Has excessive DC offset when used as a TIA

    Part Number: OPA818DRGEVM Other Parts Discussed in Thread: OPA818 , OPA855 Hi this is a continuation of a ticket I submitted earlier when I reported that when using an OPA818 as a 7.5meg TIA. With no input conected I'm typically seeing about 30mV DC offset…
    • Answered

  • OPA818: Must OPA818 thermal pad be connected to GND?

    Resolved
    Part Number: OPA818 Other Parts Discussed in Thread: OPA657 , Tool/software: Hello guys, One of my customers uses OPA657 for their current products. Also they are considering replacing this OPA657 with OPA818 for their next products. At this moment…
    • Resolved

  • OPA818: PCB design question with OPA818 (cutout plane under V- and Vout)

    Part Number: OPA818 Tool/software: Hello TI teams and forum users. Firstly hope all is doing well. We are finishing our PCB board using multiple OPA818. First as TIA and others as classic opamp. We amplify SiPM photodiode which consist of current…

  • OPA818: Thermal pad isolation issue

    TI Thinks Resolved
    Part Number: OPA818 Tool/software: Hi I have a design using the OPA818 where I need to use a sliding rail to add a DC offset to the part. All works fine until V+>11V, Vgnd=+6V and V-=+1V at which point negative rail current begins to increase presumably…
    • Answered

  • OPA818: Parallel an OPA818 (7 V/V stable) & an OPA817 (unity stable) in an alternative Power-Down scheme

    Resolved
    Part Number: OPA818 Other Parts Discussed in Thread: OPA817 , THS3091 , THS3491 , OPA837 , TIDA-01565 Hi TI expert, I am designing a gain configurable precision wideband amplifier, the OPA81x family seems meeting my requirement. However, I need to switch…
    • Resolved

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