AFE7950EVM: Can we set DAC outputs to a constant value (as in DAC38RF80) ?

Khusro Saleem

Part Number: AFE7950EVM
Other Parts Discussed in Thread: TEST2, DAC38RF80, AFE7950

Hello,

I am using the AFE9750-TRF1208-EVM in conjunction with the TSW14J56.

I would like to know if it is possible to configure the DACs to generate a constant output value for static test purposes?

This is possible using the DAC38RF80 via the SPIDAC_TEST1 and SPIDAC_TEST2 registers (see page 105 on https://www.ti.com/lit/gpn/dac38rf80). I have looked over the AFE7950 datasheet and can't find a similar register definition, but perhaps it is disguised as something else?

Thank you for your help.

Khusro Saleem

over 2 years ago

+1 David Chaparro over 2 years ago

TI__Genius 14000 points

Hi Khusro,

This is possible on the AFE7950. To enable a constant output you have to add the lines in the file below to the end of your Latte script.

ConstantOutput.txt

for i in [0,1]:
	for j in [0,1]:
		AFE.JESD.DACJESD[i].dacJesdConstantTestPatternValue(1,j,0,16384,0) # enable, channelNum, bandNum, Ival, Qval

Regards,

David Chaparro

0 Khusro Saleem over 2 years ago in reply to David Chaparro

Prodigy 70 points

Many thanks!

RF & microwave

RF & microwave forum

AFE7950EVM: Can we set DAC outputs to a constant value (as in DAC38RF80) ?