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  • OPA855: OPA855 - Trouble running Pspice simulations

    Part Number: OPA855 Hello, I’m having trouble using the OPA855 PSpice model downloaded from the Texas Instruments website. Even with very basic test circuits (for example a simple non-inverting amplifier), the simulation results don’t make sense.…

  • OPA855-Q1: Power supply range for OPA855

    TI Thinks Resolved
    Part Number: OPA855-Q1 Other Parts Discussed in Thread: OPA855 Hi I saw the recommended power supply range is 3.3V~5.5V for OPA855 in datasheet, looks it is hard to use 3.3V to power OPA855, a little drop on power line will be over the spec, is the…

  • OPA855: OPA855 TIA for Homodyne Balanced Detector

    Part Number: OPA855 Tool/software: Hello, I'm trying to design a Homodyne Balanced Detector using OPA855. I'm using two photodiode with bandwidth 145MHz and 12pF capacitance generating 900uA/1mA photocurrent each. I'd like to read the current generated…

  • OPA855: OPA855 TIA Oscillation Issue – ~3.6GHz with Photodiode, ~2.3GHz without

    Part Number: OPA855 Tool/software: Hello TI Team, I am currently working on a high-speed transimpedance amplifier (TIA) circuit using the OPA855 , and I’ve encountered unexpected oscillations at the output. I’m seeking your support to help understand…

  • OPA855: OPA855

    TI Thinks Resolved
    Part Number: OPA855 Other Parts Discussed in Thread: OPA858 , OPA838 Tool/software: Hi, I am trying to design AC-coupled TIA for two germanium-on-silicon waveguide photodiodes (Cd = 10-50 pF, Rs=1-10 MOhm) in a balanced configuration. I need a TIA…

  • OPA855: Howland current pump

    Part Number: OPA855 Other Parts Discussed in Thread: OPA830 , LMH6611 Hello, E2E I'm jonghyn I want to design howland current pump using TI product. so i download PSPICE for TI and simulate it. My design target is maximum 0.75mA +- 0.75mA (1kHz…
    • Answered

  • OPA855: OPA855 Faulty Sim with Spice Model

    Resolved
    Part Number: OPA855 Tool/software: I am simulating the OPA855 to be used as a TIA. I am using LTSpice as that is the software I'm most familiar with. Attached below is the schematic, the circuit on the right is where I try to use the OPA855 You will…
    • Resolved
    • Answered

  • OPA855: OPA855: TIA in an optical front-end system - Specifications for the voltage references

    Resolved
    Part Number: OPA855 Other Parts Discussed in Thread: OPA859 , LMH6881 Tool/software: Hi Team, On page 21 of the OPA855 datasheet an optical front end input stage is described . There are two reference voltages here: 1. which criteria are important…
    • Resolved
    • Answered

  • OPA855: Question About Using OPA855 for Differential TIA Design

    Resolved
    Part Number: OPA855 Other Parts Discussed in Thread: OPA856 , TINA-TI Tool/software: Hello, I am currently designing a differential transimpedance amplifier (TIA) using the OPA855. My design is based on the paper "Wide-Bandwidth Low-Noise Simple Differential…
    • Resolved

  • OPA855: OPA855 as a transimpedance amplifier

    Part Number: OPA855 Tool/software: I would like to use your OPA855 as a transimpedance amplifier for a 2.5GHz photo diode detector. I need 2.5GHz bandwidth. Using your “Application Report SBOA122–November 2009” I should be able to get there. I have…

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