What this op amp is and where it fits
The Maxim MAX4321EUK+T is a single-supply, general-purpose operational amplifier in a SOT-23-5 package. It delivers a 5 MHz gain-bandwidth product and a 2 V/µs slew rate, with rail-to-rail output swing that preserves dynamic range on low-voltage rails. Supply span runs from 2.4 V to 6.5 V, making it a fit for battery-operated instruments, sensor signal conditioning, and portable audio paths where board space is tight.
Key ratings and what they mean for the BOM
The 5 MHz GBP sets the usable closed-loop gain bandwidth. The 2 V/µs slew rate limits full-power response. Rail-to-rail output means the output can swing within millivolts of each supply rail. Input bias current is 50 nA typical. Supply current of 725 µA per amplifier is moderate. It is not the lowest quiescent for always-on sensing, but it is low enough for portable gear that spends most time in sleep and wakes the amp for measurement bursts.
Temperature grade and environment
Rated for -40°C to 85°C, the MAX4321EUK+T covers industrial-temperature environments. The SOT-23-5 footprint keeps the PCB area small.
Lifecycle and sourcing reality
Listed as Active with ROHS3 compliance.
