• LTC2157-14 conversion errors at 250MHz sampling rate

    I am using LTC2157-14 in a design.

    In the last production run (10 units) i get conversion errors on all boards when sampling at 250MHz.

    What i call a conversion error is a single sample with very high amplitude when measuring noise (shorted input), typically…

  • LTC2157 Software Reset time


    My customer is considering the LTC2157.

    I have a question about the software reset function.
    How long time from writing 1 to register A0 until the reset is completed?

    Best regards


  • LTC2157 2-Tone IM3 at 140MHz?

    What is LTC2157 Two-Tone Input IM3 at 140MHz? 

    I don't see any IM3 info in the datasheet, and I only see one spectral plot with a 2-tone input around 70MHz.

    Are there more 2 tone plots or IM3 versus input frequency data available anywhere?


  • 2011-01-10 14:14:47     workqueue

    2011-01-10 14:14:47     workqueue

    Chris Brissette (UNITED STATES)

    Message: 97302   

    I have been hunting a random lockup, happens about once a week. Seems like it has something to do with the using the ttybf1 uart.  I have been looking to where workqueue…

  • [LTM9006-14]

    The Vcm on My Demo board DC1751 doesn't have output,is it wrong?And what the output type of FR and DCO ?LVDS?

  • RE: ADF4356 for ADMV1013/14


    The ADMV1013 should still work (i.e there will be conversion gain) but at a decreased level along with decreased linearity (OP1dB and OIP3). At 25C there will be only a small difference in conversion gain. These effects will be more pronounced at…

  • RE: LTC2153-14 CLKOUT

    The CLKOUT will follow the ENC signal with a small delay.  If ENC is high then CLKOUT will be high shortly after that. 

    The default it 0 degree phase shift

    There is no reason to dynamically change the phase of the output clock.  It is something you set…

  • RE: LTC2314-14 not working

    NCS should not go high and then low in between the two groups of 8 SCK pulses.

    Please provide a waveform for SDO.

    There is 1 cycle of latency on this part, so the first conversion result will always be garbage. If multiple conversions are done, do all…

  • LTC2258-14 No output or CLKOUT

    We are trying to use the ltc2258-14 with the serial programming mode, Double data rate CMOS.  We can not get any output on the clkout line or any of the data lines.  We have also been unable to read any of the mode registers.

    Any thoughts as to why we wouldn…