300 ksps, 16-channel, 8-bit SAR ADC in a 24-QSOP
The Analog Devices MAX11642EEG+ is an 8-bit successive-approximation-register (SAR) analog-to-digital converter that multiplexes 16 single-ended inputs through a single conversion core. It samples at 300k samples per second over an SPI serial interface, making it a fit for moderate-speed data acquisition where channel count matters more than high resolution. The part operates from a single 5V supply for both the analog and digital sections, simplifying rail planning. It accepts either an external or internal voltage reference, giving the designer flexibility to match the ADC's full-scale range to the sensor output swing. Housed in a 24-pin SSOP (0.154" body width) and also offered as a 24-QSOP supplier device package, the MAX11642EEG+ is a surface-mount part suited for compact, mixed-signal PCBs where board area is constrained. The operating temperature range of -40°C to +85°C covers industrial and outdoor telecom environments.
16 channels, one conversion engine — what the architecture means
The 1:1 S/H-to-ADC ratio and single-ended input configuration mean all 16 analog inputs share one sample-and-hold and one converter. Channel-to-channel skew is determined by the conversion time plus the multiplexer settling; for the 300 ksps aggregate rate, each channel sees roughly 18.5 µs of conversion time when scanning all inputs sequentially. This matters if the application needs near-simultaneous sampling of multiple signals — a simultaneous-sampling ADC would be a different architecture. The 8-bit resolution yields 256 code steps. For a 5V reference, the LSB size is 19.5 mV. That is adequate for monitoring power-supply rails, temperature thresholds, or potentiometer feedback where 1% accuracy is sufficient, but not for precision instrumentation or audio.
Active lifecycle — no LTB risk for new designs
The MAX11642EEG+ carries an Active product status with ROHS3 compliance. This part can be specified into new production BOMs without near-term obsolescence risk.