What the 14 SPS sampling rate buys you
The MCP3551-E/SN: The differential input (Input Type: Differential) means the ADC measures the voltage difference between the two input pins, not the signal relative to ground. That cancels common-mode noise picked up on long sensor leads — a thermocouple run across a motor drive cabinet stays readable.
Supply rails and temperature grade
The -40°C to 125°C operating range covers automotive under-hood and industrial oven-adjacent environments. The part comes in an 8-SOIC package (0.154" body width, 3.90 mm), surface-mount, shipped in a tube. The SPI data interface uses just four wires (SCK, SDO, CS, and the external reference input), so it ties into any microcontroller with a spare SPI port.
The MCP3551-E/SN is listed as Active — Microchip continues to manufacture it. It is RoHS3 compliant.