DAC38RF80: single ended output from divided clock output differential pins CLKTX+ (A7) & CLKTX-(A6)

LALIT VERMA

Part Number: DAC38RF80

Hi TI,

We are using DAC38RF80 in our design.

We want to use the differential clock output signal CLKTX+ and CLKTX- in single ended mode.

Please suggest us how to do the connection of CLKTX+ and CLKTX- in schematic so that we can use this divided clock output from DAC38RF80 in single ended mode.

Thanks,

Lalit

over 6 years ago

0 dBrock over 6 years ago

TI__Genius 12780 points

Hi Lalit,

We are looking into this question, and will be back with you soon.

Best Regards,

Dan

0 LALIT VERMA over 6 years ago in reply to dBrock

Expert 1695 points

Hi dBrock,

Can you give some update on this?

Thanks,

Lalit

0 LALIT VERMA over 6 years ago in reply to LALIT VERMA

Expert 1695 points

Hi dBrock,

Please respond to this question.

Thanks,

Lalit

0 dBrock over 6 years ago in reply to LALIT VERMA

TI__Genius 12780 points

Hi Lalit,

Thank you for your patience as one of our experts finds the correct answer.

Best Regards,

Dan

0 jim s over 6 years ago

TI__Guru* 91947 points

DAC38RF8xEVM-SCH_E.pdfLalit,

Please see sheet 2 of the attached schematic.

Regards,

Jim

0 LALIT VERMA over 6 years ago in reply to jim s

Expert 1695 points

Hi Jim,

Thanks for the reply.

I have already seen the DAC EVM schematic before. In EVM, balun is used to convert differential clock signal to single ended.

But I don't want to use balun.

I just want to use CLKTX+ pin for single ended output operation and don't want to use CLKTX- pin.

So what you recommend :

Should I left CLKTX- pin floating or terminate it with 50 ohm resistor or some other configuration?

Please suggest.

Thanks,

Lalit

0 jim s over 6 years ago in reply to LALIT VERMA

TI__Guru* 91947 points

Lalit,

I would suggest a series 0.1uF cap to GND on the unused pin.

Regards,

Jim

Data converters

Data converters forum

DAC38RF80: single ended output from divided clock output differential pins CLKTX+ (A7) & CLKTX-(A6)