12-bit SAR ADC at 420 ksps — what the throughput buys you
The MAX1266BEEI+ is a 12-bit successive-approximation-register (SAR) ADC from Maxim Integrated that samples at 420k samples per second. That throughput, combined with a multiplexed front end (MUX-S/H-ADC) accepting either single-ended or pseudo-differential inputs, makes it a fit for scanning multiple analog channels in industrial control, data-acquisition systems, and instrumentation where moderate speed and 12-bit resolution are the design targets.
Input flexibility and interface
The part supports three or six input channels depending on configuration, with a 1:1 sample-and-hold-to-ADC ratio. The parallel data interface gives deterministic read timing — no serial latency to budget — which matters when the host controller needs a sample on a fixed clock edge. Reference can be internal or external, so you can match the ADC full-scale range to the sensor output without an extra reference IC.
Supply rails and temperature grade
Both the analog and digital supplies run from a single 5 V rail, simplifying the power tree. The -40°C to 85°C operating range covers industrial and outdoor environments — motor drives, remote telemetry, or engine-bay-adjacent electronics — without needing a wider-temperature part. The 28-QSOP package (0.154" body width) is a compact surface-mount footprint that routes well on a 2-layer board.