The MAX191BCNG+ is a 12-bit SAR ADC with a single pseudo-differential input channel, sampling at 100k samples per second. It integrates an internal voltage reference and communicates over SPI or parallel data bus. The through-hole 24-pin DIP package (0.300" body width) makes this ADC a natural fit for socketed prototype boards, MRO replacement in existing equipment, or designs where vibration resistance isn't the primary concern.
Supply rails and signal chain planning
The analog section runs on ±5V bipolar supplies or a single 5V rail, while the digital interface requires a separate 5V supply. That dual-supply architecture means your board needs a clean ±5V analog rail — a switching supply followed by a low-noise LDO or a post-regulator filter stage. The pseudo-differential input accepts a signal referenced to a common-mode point, which helps reject ground noise between the sensor and the ADC when the source is remote.
Lifecycle and sourcing — still an active line
The through-hole DIP package is a mature, non-moisture-sensitive format; store the tubes in a standard ESD-safe cabinet, no dry-bake required before reflow (though reflow doesn't apply here — hand-solder or wave-solder only).