Single op-amp in SOT-23-5, 5 MHz GBW
The Maxim MAX4122EUK is a single general-purpose operational amplifier in a 5-pin SOT-23-5 surface-mount package. It delivers a 5 MHz gain-bandwidth product and a 2V/µs slew rate, with rail-to-rail output swing. Quiescent current is 725 µA per channel. Output drive capability is 50 mA per channel.
RoHS non-compliant — verify assembly line compatibility
However, it is marked as RoHS non-compliant. This is a critical sourcing constraint: if your assembly process requires lead-free solder and RoHS-compliant materials, this part cannot go through a standard reflow profile without a waiver or exemption. For legacy or exempted military/aerospace builds where tin-lead solder is still permitted, the active status is an advantage — no end-of-life clock is ticking on this order code.
The 2V/µs slew rate limits the large-signal bandwidth to roughly 320 kHz for a 2 V peak-to-peak output swing (slew rate / π × Vpp). For smaller swings the 5 MHz GBW dominates. This is adequate for general-purpose filtering, sensor conditioning, and audio-frequency stages, but too slow for high-speed ADC drivers or video buffers. The rail-to-rail output stage helps preserve dynamic range in low-voltage single-supply designs.
Because the MAX4122EUK is active but RoHS non-compliant, it is not stocked by every distributor. Submit an RFQ for this order code to verify stock position and lead time against your BOM line. The SOT-23-5 footprint is standard and shared with many single op-amps, so if a RoHS-compliant alternative is needed, parts like the MAX4122EUK+ (lead-free suffix) may be cross-shopped — confirm the full order code before substituting.