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AD8347 VGIN pin

Question asked by pxcheah on Sep 6, 2016
Latest reply on Oct 7, 2016 by stanis

I am using the AD8347 as a mixer to downconvert a RF signal. However, I am operating the chip without using the AGC and the baseband amplifiers, thus my output signals are coming out from the IMXO and QMXO pins. According to the datasheet, it is suggested that VGIN pin is applied from a range of 0.2 to 1.2V.

Due to the reason that I do not need an amplification of the signal, I have applied the pin to 1.25V to obtain 0dB total gain.

My question is whether the 1.25V is an acceptable value to apply onto the VGIN pin? Please feel free to leave any comments regarding my application on this chip. Thanks!!