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Original question:

INA137: Can i using external resistor to In+ and In- to further reduce the gain ?

INA1650: XLR receiver schematics review

PYTsai
Genius 9315 points
Part Number: INA1650

Hi 

Would you help review my INA1650 XLR receiver schematics below, is it looks ok or any suggestion ?

  • 0
    TI__Genius 10850 points

    Hi PYTsai,

    Thanks for your post. I have reviewed this and it looks good. My only concern is the C7 filter capacitor of 1µF at VMID(IN), this can lead to a time constant of 0.5 seconds or more. If this is unacceptable, consider adding a zener diode as shown in section 8.1.3 of the INA1650 datasheet to reduce this start-up time.

    The section I am referring to can be found on pages 19 and 20 of the datasheet.

    INA1650 datasheet: http://www.ti.com/lit/ds/symlink/ina1650.pdf