12-bit SAR ADC with I2C — what it is and where it fits
The Maxim Integrated MAX1363EUB+ is a 12-bit successive-approximation-register (SAR) ADC with an integrated input multiplexer, sample-and-hold, and I2C serial interface. It accepts either differential or single-ended inputs across two or four channels, configurable through the multiplexer. The on-chip reference can be used internally or overridden with an external reference for ratiometric measurements. A selectable I2C address allows multiple devices on the same bus without conflict. The part operates from a single 2.7 V to 3.6 V supply for both analog and digital rails and is rated over the industrial temperature range of -40°C to 85°C, suiting it for outdoor telecom, factory-floor data acquisition, and engine-bay sensor interfaces.
Package and footprint — 10-uMAX/uSOP
Housed in a 10-lead uMAX/uSOP package (3.0 mm body width, 0.118" pitch), this is a surface-mount part intended for dense PCB layouts. The 10-uMAX footprint is shared with several Maxim ADC and DAC parts, so a board layout can often accommodate a drop-in swap if a different resolution or channel count is needed later.
Lifecycle and sourcing reality
ROHS3 compliant. No second-source alternate is listed in the official record, but the selectable I2C address and common footprint mean a functionally equivalent 12-bit I2C SAR ADC from another vendor could be qualified as a dual-source option if the BOM requires supply resilience.