What this dual 100kΩ digital pot brings to the board
The MAX5405EUB+ from Maxim Integrated is a dual-channel digital potentiometer with a linear taper, 256 wiper taps per channel, and a total end-to-end resistance of 100kΩ. It communicates over an SPI interface, which means the wiper position is set by a simple serial write — no external DAC or op-amp needed for a programmable voltage divider or adjustable reference. The 10-uMAX/uSOP package (3.00 mm body width) fits tight mixed-signal layouts where two independent pots are needed without doubling the footprint.
SPI interface and volatile memory — design constraints at a glance
The wiper setting is volatile, so on power-up the wiper returns to its default mid-scale position. Plan for a hardware reset or a software write in the init routine.
Lifecycle and sourcing — no obsolescence headache here
The MAX5405EUB+ carries an Active product status and is ROHS3 compliant. There is no NRND flag, no last-time-buy notice, and no announced end-of-life. That means it can be specified into new designs today without planning for a future substitution.