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  • OPA1652: Comparison of OPA1652 and LF353

    Part Number: OPA1652
    Other Parts Discussed in Thread: LF353, , OPA4172

    Tool/software:

    Hi,

    We have a legacy design with a differential mode op-amp that uses LF353. We have high CM noise input to the differential circuit and we only care about DC input…

  • Excess THD in DAC8822 circuit used as audio DAC

    Part Number: DAC8822
    Other Parts Discussed in Thread: OPA1652, OPA1602, , BUF634, TINA-TI, OPA1612, OPA1656, OPA1642, DAC11001B

    Tool/software:

    Hello, I'm using the DAC 8822 for a high resolution audio application as in the attached schematic. The 8822…

  • OPA1652: Question on the rail performance

    Part Number: OPA1652
    Other Parts Discussed in Thread: OPA1688, OPA1656, INA849, JFE150

    Tool/software:

    I'm designing the input stage for a guitar input and have identified the OPA1652 as a good candidate, but I have a question.

    The Vcm in the datasheet…

  • OPA1662: unbalanced outputs

    Part Number: OPA1662
    Other Parts Discussed in Thread: OPA1652

    Tool/software:

    Hi,

    I designed and built this circuit as a differential ADC input stage.

    If I select the x4 gain or x8 gain (changing R3 value) the outputs are completly unbalanced.

    If I measure…

  • OPA1652: OPA1652 VS OPA1688

    Part Number: OPA1652
    Other Parts Discussed in Thread: OPA1688

    Hi TIer

    What about the different between OPA1652 and OPA1688.

    Is these two chip can drop in replace by each other?

    If can not , which parameter we need pay more attention to ? 

    Thank you very…

  • OPA1652: OPA1652AIDR no output

    Part Number: OPA1652
    There is no output when testing on the machine, what is the reason?
  • OPA1678: Replacement or upgrade for OPA1678IDGKR

    Part Number: OPA1678
    Other Parts Discussed in Thread: OPA1652, OPA1662

    Hi there!

    We are looking for a replacement for the OPA1678IDGKR, which we are having a lot of trouble sourcing, in a MSOP-8 (VSSOP) package, similar dimensions, 3.00mm x 3.00mm x 0.90mm…

  • RE: TAS2563: Multi-Stage Volume Ramp During Playback After Device Turn-On

    Other Parts Discussed in Thread: OPA1652, ADS1271, THS4521

    Hey Ivan,

    If I integrate over the entire frequency spectrum for the normalized displacement, I get approx. 9.5 mm/V...this seems quite high relative to the maximum value allowed (10 mm). What is…

  • OPA1642: Application in single power supply

    Part Number: OPA1642
    Other Parts Discussed in Thread: OPA1652, OPA1688

    Dear,

    Is there a recommended application for OPA1642 working in +5V single power supply, is there any risk?  It seems below application not working properly, it on some units get terrible…

  • OPA1642: vs. OPA1652 Output voltage vs. Output current

    Part Number: OPA1642
    Other Parts Discussed in Thread: OPA1652

    Hi team,

    The following two sets of Output Voltage vs. Output Current characteristic curves seem to behave in opposite manners. 

    For OPA1642, the output current (limit) appears to increase with…

  • LM7321: LM7321 SOT23-5 max height of 1.45mm?

    Part Number: LM7321
    Other Parts Discussed in Thread: OPA172, OPA2210, OPA1652, OPA1678

    Hi,

    I'd like to use this amplifier, but I find it strange that a SOT23-5 has a height tolerance up to 1.45mm while other SOT23 are ofter up to 1.1mm.

    Is the 1.45mm…

  • OPA1622: BA3308F TI cross

    Part Number: OPA1622
    Other Parts Discussed in Thread: OPA1688, OPA1656, OPA1652

    Hi team,

    Could you please suggest BA3308F TI cross?

    My customer is looking for EOL replacement device.

    ALC is not needed, please just recommend hero dual audio amps.

    https…

  • OPAX197 Vs= +/-18V, RL=600 ohms conditions. Will it work correctly?

    Other Parts Discussed in Thread: OPA197, OPA1652, OPA1662

    I need to drive RL=600 Ohms with an opamp powered by +/-18V to output voltages exceeding 15-16V(peak). Is OPAX197 the right choice? The datasheet information indicates high output current but there…

  • OPA1652: Distortion function

    Part Number: OPA1652
    Other Parts Discussed in Thread: OPA1612

    Hi Team,

    Good day.

    Customer was trying to simulate distortion in OPA1652 using the PSPICE model, according to them they cannot see any distortion at the output.

    Can you please confirm if the…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Liam,

    Yes, the circuit as you have modified appears to work in a linear fashion now. I don't have any more ideas why the OPA1652 input is clamping at Vin > 0.9 V input.

    Do you have type of precision op amp you can substitute for the OPA1652,…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Thomas,

    they did have a 1k resistor on the output but i removed it as it was causing the overheating. (i didnt include it in the diagram because i had removed it from the board already) I only mentioned it because we were discussing the posibility…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Liam,

    The OPA1652 op amps in your application circuit do not have any significant resistive loads on the output so they shouldn't be consuming much current beyond the quiescent current. They only draw about 2 mA and shouldn't be getting hot to the…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Thomas,

    So today i tried my other board...i removed the cap from the output of opamp a and the resistor from the output of opamp b . I also removed the feedback from 2 out of the three instances of the circuit on this new board. I then powered and…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Thomas,

    Thanks again for the help. Yesterday i removed the feedback from opamp B to the inverting input of opamp A and the DAC was able to reach 5v so im now sure that it is the feedback between the opamps that is causing the issue. The board i am…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Liam,

    Thank you for providing the DAC information. I don't find any reason why it should have an issue directly driving the OPA1652 input in a properly functioning circuit. 

    Our op amp products are fully analyzed and then tested for latch-up behavior…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Thomas,

    Yes this was what was making me think the op amp is damaged or in latchup. the DAC im using is a MAX5216. i have tried it with the outpit disconnected from the opamp input and i can see the output go from 0-5v as i would expect. its only with…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Liam,

    The OPA1652 input following the DAC should not load its output. It has an extremely high input impedance. What is the DAC part number that you are using in the circuit? Is it truly a voltage output DAC?

    Regards, Thomas

    Precision Amplifiers Applications…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Thomas,

    thanks for getting back to me. The supply is +-15v. I have removed the 100nF cap from the output of the first opamp and it doesnt seem to have made much difference. The opamps arent getting hot any more after i removed a 1k pull down resistor…

  • RE: OPA1652: Constant current sink design...opamp pulls down 5v dac on inverting input to 1v. Is my feedback configuration viable?

    Hi Liam,

    What supply voltages are you applying to the OPA1652 supply pins, and the using to power the solenoid? This circuit may have stability problems due to the design. The OPA1652 is very likely to become unstable with a 100 nF capacitor, and the…

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