The datasheet stated that IFIN1 (pin 17) to be connected to ground with a 1500pf capacitor while IFIN2(pin 18) to be connected to the output of 10.7Mhz bandpass filter. However, the MAX1473EVKIT schematic has it reversed. Is this acceptable? Will it affect the circuit operation?
Answer:
The IFIN1 and IFIN2 together are differential inputs, therefore the pins can be used interchangeably. Both the circuits in the datasheet and the evkit datasheet are correct, and neither circuit is affected by the interchanged connections.