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  • OPA690: Output impedance

    TI Thinks Resolved
    Part Number: OPA690 Hi Team, The data sheet says the output is high impedance when its disabled but in simulation is appears to have a low resistance load. Feeding a 1V DC source back to the output of the amp through 25 ohms it appears the amp output…

  • OPA690: OPA690IDBVT substitute

    Part Number: OPA690 Hello I was looking for OPA690IDBVT but can't find it anywhere. I have PCBs. Now I am looking for similar replacement to make: (1) inverting amplifier with gain =1, (2) non inverting amplifier with gain 2 and (3) a inverting summing…

  • OPA690: Power rail question.

    TI Thinks Resolved
    Part Number: OPA690 Can I power this OPAMP with +10V and -1V? , trying to use it to drive a load cell circuit and trying to avoid the cross over distortion by adding a small negative bias.

  • OPA690: Harmonic distortion measurement

    Part Number: OPA690 Hi all, I need your help to understand how to reach the THD performances reported in OPA690 datasheet. Below the application circuit: The input signal is 1Vpp, sinewave, 1kHz; the spectrum analyser input impedance is 50ohm. I get…

  • OPA690: output voltage

    TI Thinks Resolved
    Part Number: OPA690 Other Parts Discussed in Thread: DAC2904 , , TINA-TI , THS3217 , THS3215 Hi team, There is a question about DAC2904 output current to voltage conversion circuit. The customer is using OPA690 to implement this conversion. The circuit is…

  • OPA690: Better alternative for a specific use case?

    TI Thinks Resolved
    Part Number: OPA690 Other Parts Discussed in Thread: OPA3690 Team, Can you please to identify if we have some possible better alternatives to OPA690 for the below use case? Voltage feedback OP-Amp for: Freq. range 0Hz…30MHz Input: Differential input…
    • Answered

  • OPA690: Simulation issues with unit gain.

    Resolved
    Part Number: OPA690 Other Parts Discussed in Thread: TINA-TI , LMH6559 , BUF602 , BUF802 Hi, I am simulating this device as unit gain with TINA-TI version 9.3. The simulated circuit is shown below: I have a Sine wave with amplitude of 2V in the voltage generator…
    • Resolved

  • OPA690: Small signal generation, SNR, THD performance with a high load

    Part Number: OPA690 Other Parts Discussed in Thread: OPA656 , OPA820 , TINA-TI , OPA810 I had to replace an OPA in an existing design. Because of output current drive requirements I selected the OPA690. In my application I need to drive a speaker which has…
    • Answered

  • OPA690: PSpice Model Issues

    Resolved
    Part Number: OPA690 I downloaded the model for the OPA690 from the TI website. I added the model to my design, and tried to simulate. I used the .lib and .olb files unaltered. When I ran the simulation, I got the following errors: ERROR(ORPSIM-15108…
    • Resolved

  • OPA690: OPA690 power design

    TI Thinks Resolved
    Part Number: OPA690 Hi Team: My customer use OPA690 and wants to do the application of active filters. The input signal is negative pulse signal with the range of -10mV to -1V. Please help confirm its power supply mode, Is ± 2.5V or ±5V appropriate?…

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