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TRF372017EVM: External DC voltage on I/Q input

Genius 11378 points
Part Number: TRF372017EVM
Other Parts Discussed in Thread: TRF372017

Hi Expert,

Good day. Saking your assistance on this query from Cx:

I'm using the EVM board for test the possibility to use the components as phase shifter. Basically the idea is provide a DC voltage on I/Q pins.

We have test and it works. But there is something strange. Let me explain: We set the RF Freq @ 500MHZ. We set to Pup the bit PWD_OUT_BUFF, PWD_LO_DIV, PWD_TX_DIV And in PDn the registers PWD_BB_VCM and PWD_DC_OFF, this because we want to control the phase from external DAC. We set the voltages at the BB PINS and measure the phase between RF OUT and LO OUT, for example we set for be in Phase. We set PWD_LO_DIV to PDn and after PUp, we get that the phase is changed. Same if we turn OFF and ON the PWD_OUT_BUFF. We dont understand why happen.

Thanks for the support.

Archie A.