What this 12-bit SAR ADC brings to the bench
The MAX1246BCEE+ is a 12-bit successive-approximation (SAR) ADC from Analog Devices, sampling at 133 ksps over an SPI interface. It packs a multiplexer, sample-and-hold, and the ADC core in a single 16-QSOP package — a compact fit for multichannel data-acquisition boards where board space is tight. The part accepts either differential or single-ended inputs, configurable per channel, so one device can handle a mix of sensor bridges and single-ended voltage signals without an external mux.
Supply and signal range — what fits
Both analog and digital supplies run from a single 2.7V to 3.6V rail, which maps cleanly onto a 3.3V system bus. No separate analog supply needed, though a clean 3.3V rail with a ferrite bead and a 1 µF decoupling cap at each supply pin keeps the SAR core quiet. The reference can be internal or external — the internal reference saves a component on the BOM if absolute accuracy isn't critical; for ratiometric measurements or tighter drift, an external reference gives you control.
Housed in a 16-QSOP (0.154" body width, 3.90 mm), this is a fine-pitch SSOP derivative. The package is small enough that thermal mass is low — it lifts clean with a 340°C hot-air nozzle and a gentle twist.
Temperature grade — where it belongs
That puts it in office equipment, benchtop instrumentation, and indoor data loggers — not under the hood or on a factory floor where the ambient hits 85°C. If your design lives in a conditioned space, this is the right cost tier; if it sees an engine bay or a rooftop enclosure, you need the industrial-range sibling.