16-bit SAR ADC with PGA — one chip does the analog front-end
The MAX1300BEUG+ from Maxim Integrated is a 16-bit successive-approximation-register (SAR) ADC that integrates a programmable gain amplifier (PGA), an input multiplexer, a sample-and-hold, and the ADC core in a single 24-TSSOP package. It accepts either four differential or eight single-ended inputs, selectable through the MUX, and communicates over an SPI interface. The internal reference eliminates the need for an external voltage reference in many designs, though an external reference can also be driven. With a sampling rate of 115k samples per second and a single 5V analog and digital supply, this part is built for precision measurement in industrial control, data acquisition, and sensor interface applications where board space is tight and the signal chain needs to stay simple.
PGA and internal reference — fewer external parts, cleaner BOM
The integrated PGA lets you amplify small sensor signals before conversion, which improves the effective resolution at low input levels. The internal reference is factory trimmed; using it saves a reference IC and its associated bypass capacitors. For designs that need a ratiometric measurement or a different reference voltage, the external reference input is available. The SAR architecture itself gives no pipeline delay, so the output code corresponds to the sample taken at the instant of the conversion start — important for multiplexed systems where channel timing matters.
Industrial temperature range and package
Rated for -40°C to 85°C, this ADC is specified for factory-floor enclosures, outdoor telecom cabinets, and engine-bay-adjacent electronics where commercial-grade parts drift or fail. The 24-TSSOP package (4.4 mm body width) is a common footprint for mixed-signal PCBs; it routes well on a two-layer board if the analog and digital grounds are split cleanly under the part. Supplied in tubes, which is typical for prototype and low-to-medium volume builds — reel options may exist under a different suffix.
Sourcing and lifecycle — active, no obsolescence risk for new designs
The MAX1300BEUG+ carries an active lifecycle status from Maxim (now part of Analog Devices). For a BOM line that needs a 16-bit SAR ADC with PGA and SPI, this part is a straightforward choice without the supply-chain uncertainty of an NRND or obsolete component.