Sample and Hold IC LF398

Discussion in 'General Electronics Chat' started by syee10, Mar 1, 2011.

  1. syee10

    Thread Starter Member

    Mar 26, 2010
    59
    0
    Hi,

    Anyone here can tell me how to connect a Sample and Hold IC LF398 in practical so that i can get a V(out) waveform as shown in the attached file? The V(in) and V(sample) is shown in the attached file also. Please provide me a simple schematic diagram if possible. The datasheet can be found in the following links:

    http://pdf1.alldatasheet.com/datasheet-pdf/view/95569/ETC/LF398.html
     
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  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    If you want to sample when the digital input is low, and hold when it is high as shown in your waveforms, connect a voltage divider to pin 8 so that the voltage is 3.9V. The resistors can be on the order of tens of kohms. Apply the digital signal to pin 7.
     
  3. syee10

    Thread Starter Member

    Mar 26, 2010
    59
    0
    Ron,

    Can you draw a simple schematic diagram to me? Thanks alot!
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    I copied this from page 5 on the National datasheet, and made a few changes.
     
  5. syee10

    Thread Starter Member

    Mar 26, 2010
    59
    0
    Thanks i can get the result already
     
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