12-bit SAR ADC with SPI — what the ratings mean for your BOM
The Maxim Integrated MAX11634EEE+T is a 12-bit successive-approximation-register (SAR) analog-to-digital converter with an SPI serial interface, sampling at 300k samples per second. Its architecture delivers a clean conversion in a single cycle — no pipeline latency — which matters for control-loop and multiplexed-sensor applications where you need a deterministic result per conversion start. The part accepts either differential or single-ended inputs, configurable per channel, with a 1:1 sample-and-hold-to-ADC ratio. A single 5V supply powers both analog and digital sections, so the digital interface levels are 5V logic — check that against your host MCU's I/O tolerance if running at 3.3V. With two or four input channels (the datasheet configures them as 2 differential or 4 single-ended), this ADC fits industrial sensor front-ends, data-acquisition modules, and portable instrumentation where 12-bit resolution and moderate speed are adequate. The -40°C to 85°C operating range covers factory-floor and outdoor telecom cabinets — no need for extended-temperature screening unless the ambient exceeds that window.
Package and footprint — 16-SSOP / 16-QSOP
The MAX11634EEE+T is supplied in a 16-pin SSOP package (0.154-inch body width, 3.90 mm) and also listed with the supplier device package 16-QSOP — these are footprint-compatible. The SSOP footprint is dense but hand-solderable with a fine tip; for reflow, the MSL rating should be verified from the full datasheet (not carried in this listing), but Maxim typically rates these as MSL 1. Ensure the 5V analog and digital supply pins are decoupled close to the package with a 0.1 µF ceramic capacitor per the application note.
Lifecycle and sourcing reality
This is a standard Maxim catalog part, widely distributed.