• 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?

  • 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

    AD600
    AD602
    AD603
    AD604
    AD605
    AD8264
    AD8330
    AD8331
    AD8332
    AD8334
    AD8335
    AD8336
    AD8337
    AD8338
    ADL5246
    ADL5330
    ADL5331
    LTC6412
    HMC6187G
    HMC997G
    HMC996
    HMC694G
    AD8368
    AD8351
    AD8367
    AD75071
    AD552…
  • 使用运算放大器实现直流耦合电池供电电路中的问题

    AN-581_cn.pdf

    参考ADI 应用笔记AN_581《单电源应用中的偏置和去耦运算放大器》设计直流耦合电池供电电路,在P6底部提到电路中 RA,RB电阻阻值的选择需要查看AD663A 数据手册,我查过后发现没有AD663A这款芯片,AD6634/6635/6636是已经停产了的模数转换器,数据手册中也没看到这一部分的内容,这个要怎么解决呢?

    问题2:该电路中,使用了一个跟随器电路,它是起隔离的作用吗?但是为什么反相端和输出端之间连接了一个110k欧姆的电阻呢?

  • ADI运算放大器选型指南

    ADI运算放大器选型指南

  • 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…