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  • TI Thinks Resolved

BUF602: Voltage follower for a clock signal with very low drive capability (25 pF)

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Part Number: BUF602

Hello everyone,

I'm designing a Final Test board for a new DC-DC converter. This device has two SYNC pins which are I/O pins that either output a clock @ 500KHz or take in an

external input clock.

When its configured as an output, Here are the specs:-

  • The drive capability for this pin is 25 pF. It can probably drive around 100 pF without serious deformation of the signal.
  • The rise time of this device is 100ns and the fall time is around 10 ns. 
  • The Amplitude is 3V min and 7V max.

With this in mind, I'm planning to connect a voltage follower in series with this pin to be able to measure the signal accurately. 

Is there a voltage follower from TI catalog that works for this? I'm looking at BUF602 as a possible contender.

Please let me know if there are others that are better suited for this. 

Thanks,

Ravi.

  • Hi Ravi and welcome to E2E,

    Are you sure you need a buffer? If it is a clock signal and a square wave, you may get better performance from a high speed comparator such as the LMx19.

    Best regards,

    Sean

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