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  • OPA855: TIA Design with offset between V_IL TYP and MAX

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    Part Number: OPA855 Hello TI Team! We have a two-stage transimpedance amplifier circuit for photodiode current conversion. The OPA855 is operating with VS+ at 3.3V and VS- at GND. Following the recommended TIA design, we have an offset voltage on the…
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  • OPA855: Is there an ADS model for OPA855?

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    Part Number: OPA855 Other Parts Discussed in Thread: OPA380 , OPA830 , TINA-TI Hi, I found Pspice model for OPA855, when I import it into ADS software, it complete, but when I excute simulation, there's wrong message named "ADS syntax parser error in ADS…
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  • OPA855DSGEVM: Discrepancy between the measured gain bandwidth of OPA855 Evaluation Board and the product manual

    Part Number: OPA855DSGEVM Other Parts Discussed in Thread: OPA855 Hi, team, We bought an OPA855 evaluation board from TI and built a circuit network based on Page 8 of the product manual (VS+ = 2.5 V, VS– = –2.5 V, VIN+ = 0 V, RF = 453 Ω, Gain = 7 V/V…

  • OPA855: Does a series DC blocking capacitor add to input capacitance for a photodiode TIA application?

    Part Number: OPA855 Referencing Figure 10-8, 10-9, and 1-10 (pages 26-27 of OPA855 datasheet). Increasing C_D results in a lower bandwidth. My application includes a reverse biased photodiode, with an RC HPF (series 2400pF, shunt 10kOhm) between the photodiode…

  • RE: OPA855: oscillate in output

    You are probably seeing an input transistor self oscillation due to those caps looking out the V+ input, try putting a 10ohm R here, Or at least try removing that last cap looking out the V+ input and changing that last R to 10ohms

  • OPA855: Question about circuit design

    Part Number: OPA855 Hi, I am interested to do the same i.e. to convert up to 8 GHz differential (sinewaves) to single-ended. I am interested to use the OPA855 with a single power supply, connected to 50 Ohm inputs and 50 Ohm outputs. 1. Can I use the…
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  • OPA855-Q1: SPICE Model

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    Part Number: OPA855-Q1 Other Parts Discussed in Thread: OPA855 , Hi, Is the SPICE Model available for the OPA855, if so where can I find it. I am looking to do simulations in TINA. Thanks Gary
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  • OPA855: OPA855 has a peak voltage output when enabled

    Part Number: OPA855 Hello, The OPA855 has a relatively high power consumption, and the customer uses the enable function. When enabling the operational amplifier, the output has a peak voltage (300mV-400mV) and a downward probe negative voltage. After…

  • OPA855: OPA855 simulation

    TI Thinks Resolved
    Part Number: OPA855 Hello， Does OPA855 need to add parasitic parameters of amplifier itself during simulation? Thanks！

  • OPA855: OPA855 Design reference

    Part Number: OPA855 Hi， OPA855 is used as a voltage amplification circuit, SIPM optical signal acquisition, with a bandwidth of 200MHz and a gain of 20. When the optical signal is relatively large, the signal output is distorted. Is there any relevant…

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