What this 12-bit SAR ADC brings to the board
The AD7887ARMZ is a 12-bit SAR ADC sampling at 125k SPS. It accepts a single-ended input via an internal multiplexer and communicates over SPI or DSP interface.
125k SPS — fast enough for most sensor channels, not overkill
At 125k SPS, the ADC handles one channel at full rate or multiplexes between two inputs. The MUX supports one or two channels.
That means Analog Devices is still manufacturing it, and there is no last-time-buy notice on the horizon. The ROHS3 compliance is current, so it passes European and North American environmental requirements without an exemption.
Package and storage — 8-MSOP in tube
It ships in a tube, not tape-and-reel, so if you are populating boards by hand or in small batches, you do not have to deal with a cut-tape fee or reel minimum. Store the tubes in a dry cabinet if the ambient humidity is high — MSOP packages are moisture-sensitive, and a bake before reflow is cheaper than a rework cycle.