Other Parts Discussed in Thread: DAC38J84
Hello!
I'm going to interface the DAC38J84 to the TRF370417 I/Q modulator.
I've found an application note SLUA647A "Analog Interfacing Networks for DAC348x and Modulators" and there is an explanation of passive single-supply level translation interface at pages 7-8.
My question is:
1. What is a correct value of TRF370417 input baseband impedance - 5 kOhm (as it written in the TRF370417 datasheet) or 20 kOhm (as it written in the Table 1 of application note)?
2. In case there is a mistake in application note and the correct value is 5 kOhm, how does one re-calculate the R1 - R4 resistors values? Can you please provide the required equations?
Thanks!