• RE: AD8138低温需要更高工作电压的问题


  • AD8138

    Hi there,

    I am using AD8138 to make differential input for my ADC which does not have a S&H. The problem I have is the two differential signals are not balanced! Although the output of the AD8138 is balanced when I test it without having chip on my evaluation…

  • RE: AD7934 full-differential mode

    Thanx for reply,

    Following way I've connected AD8138 (ADC driver) to AD7934.

    pin-4(AD8138) connected to pin-25 (AD7934)

    pin-5(AD8138) connected to pin-26 (AD7934)

    When I checked signal between VIN0-VIN1 of AD7934 it is coming as expected diff…

  • RE: AD9218

    Hello zhe-xin,

    Please note that the capacitor you reference in the AD8138 circuit is not across the differential input, but is actually between the Vocm input and ground.  A capacitor across the AD8138 differential input will cause problems, so this should…

  • RE: About ADC

    Hi Tom,

    Yes, I was able to review the AD8138 and AD9214 schematic blocks provided in your .png image files. I was unable to open the Altium Designer file provided in your .zip archive.

    By connecting the AD9214 REF output (1.25V) to the AD8138 VOCM pin…

  • AD8318 followed by AD8138

    I have an AD8318 Log Detector followed by an AD8138 Differential Driver.  The log detector is behaving correctly, as VOUT goes between 0.8-4.0VDC over the dynamic range of the input RF signal.  However, the AD8138 used to translate from single-ended to…

  • RE: AD9434 Analog Input Issues


    Yes, in Figure 41 the Output Common Mode Voltage (Vocm) of the AD8138 amplifier is established by the direct connection between the AD8138 Vocm input pin and the AD9434 CML output pin. It looks like the Vocm pin label was inadvertently left off the…

  • RE: ADL5511 envelope interface to AD9288

    Yes.  The Venv pin can be used as single-ended output, because the envelope information is only on Venv pin.  You can also connect both Venv and Eref pins to the AD8138 as similar to figure 42 circuit of the AD8138 datasheet page 16.  While the Venv is single…

  • AD8138S: absolute maximum rating of  supply voltage

    I have a question to the absolute maximum ratings of AD8138S. When using the
    AD8138S with a +/-5V supply everything is clear from the data sheet. The
    absolute maximum rating is +-5.5V for the supply voltages. The point that in
    not fully…