0

I am going through datasheet of TXKTPCSANF-32.000000. I require a clipped sine-wave TCXO with 1.8 Vpp maximum. However, the datasheet of the TCXO doesn't state the maximum Vpp. They have mentioned 0.8Vpp as minimum.

Find the screenshot of the datesheet below:

enter image description here

Am I missing something? Is there any standard to calculate max vpp of the TCXO? Or I assume it is the Vdd supplied to the TCXO?

EDIT:

We have part with 3.3V in stock. I am not sure if I can use the part with RF Front-end (SX1257). Is it possible that 3.3V variant of the TCXO may output less than 1.8 Vpp?

abhiarora
  • 952
  • 1
  • 12
  • 32
  • It shouldn't ever go above the supply voltage. If your 1.8V is a maximum, just give the thing 1.8V and it'll give you less than 1.8V out. – Hearth May 15 '18 at 15:01
  • I have edited my question to clarify my issue in detail. – abhiarora May 15 '18 at 15:05
  • If you have stock, why not test it? then use a C voltage divider if necessary 10pF>20pF – Tony Stewart EE75 May 15 '18 at 15:20
  • I can test it but still want to be sure if this TCXO can exceed 1.8V. May be in the conditions I will check it (like temperature), it behaves properly but can do something nasty in other conditions? – abhiarora May 15 '18 at 15:44
  • To avoid overshoots, insert a 100 Ohm resistor ---- in series with the output pin. Read up on "source termination". – analogsystemsrf May 16 '18 at 03:53
  • Then I need to have 100 ohm transmission line? – abhiarora May 16 '18 at 07:36
  • @analogsystemsrf Do I need 100 ohm transmission line? I have read that sum of source termination impedance and output impedance of source should be equal to characteristic impedance of line. Am I correct? – abhiarora May 29 '18 at 16:28

0 Answers0