• I am measuring ~3.2Ω between Output and GND pin on one failed OP727. Current ~35mA under 12V power, although inputs at 0. Could I have some clues concerning the possible cause of this failure, or an internal diagram of the OP727 output please?

    I am measuring ~3.2Ω between Output and GND pin on one failed OP727.

    Current ~35mA under 12V power, although inputs at 0.

    Could I have some clues concerning the possible cause of this failure, or an internal diagram of the OP727 output please?

  • Noise optimizing AD8599 &&

    Good day,

    I have a task to optimize noise in BW 10Hz - 10kHz.

    Voltage gain shall be around 20..50. OA connected directly to source of signal,

    which has impedance 1kOm DC and 50Om AC. OA connected to middle point of R1/R2 divider,

    where R1 connected…

  • AD7192对参考电压驱动的要求

    设计中使用电阻分压并通过OP777缓冲后得到2.5v基准电压. 因该基准同时作为激励源的基准,故对其精度要求不高.  但测试中发现, Vref上出现周期约为600KHz, 幅度超过100mv的的负脉冲,推测为AD7192的采样引起.  换用AD440+0.1uf作为参考电压则其电压几乎无类似脉冲出现.  是否OP727输出阻抗过大?  因系统并无参考电压精度要求, 考虑成本原因, 能否推荐其它合适的运放做缓冲器? 或者更廉价但驱动能力较强的电压参考来驱动ADC?

  • TAGS LIST: Amplifiers

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