Other Parts Discussed in Thread: TRF370333, THS3217
Hi team,
The DAC part of the AFE7225 is a current sink architecture. So a external pull up resistor is required for each DAC output pin.
The voltage divider resistors are to be selected to present the proper impedance that maintains proper current sink current for max voltage swing for DAC output.
We are setting 20mA DAC current sink by connecting recommended BIAS resistors.
The query is ,What is the pull-up and pull-down resistor is required to achieve maximum output swing in each DAC output channel if we connect 5V pullup to DAC output pins.
Currently we have used 115R pullup and 634R pulldown as per AFE7225 reference schematic. Is below connection and resistor values are fine to achieve maximum output swing and sink current??