Micropower op-amp for always-on sensing
The MAX4464EXK+T is a single-channel general-purpose operational amplifier from Analog Devices, built for applications where supply current is the tightest budget line. Its 750 nA quiescent current lets it sit on a battery rail without a load switch — think portable gas detectors, continuous battery monitoring, or wearable sensor front-ends where a microamp matters. The 40 kHz gain-bandwidth product and 0.02 V/µs slew rate confirm this is a low-frequency signal conditioner, not a loop compensator or audio driver. Rail-to-rail output keeps the swing clean at the 1.8 V minimum supply, so a single Li-ion cell or two alkaline cells power the whole stage without a boost converter.
Supply voltage and temperature — where it fits
Rated from 1.8 V to 5.5 V, the MAX4464EXK+T covers the common portable and industrial supply rails without a secondary regulator. The -40°C to 85°C operating range qualifies it for outdoor telecom enclosures, automotive cabin modules, and factory-floor sensor interfaces — not under-hood, but fine for the conditioned environment inside a panel or handheld instrument. Input offset voltage is 500 µV, and input bias current is 200 pA, both adequate for DC-accurate conditioning of thermocouple or bridge signals when the signal bandwidth stays under a few kilohertz.
Package and footprint
Housed in a 5-lead SC-70-5, the part fits into the same footprint as the industry-standard SOT-353. The SC-70 is roughly half the board area of an SOT-23-5 — useful when the sensor amplifier shares a cramped multi-layer board with the MCU and radio. Surface-mount only; the Tape & Reel option suits automated pick-and-place for medium-to-high volume builds.
Lifecycle and sourcing
Marked as Active and ROHS3 compliant. No NRND or EOL notice on record. The part is sourced through independent distribution and quoted to order against an RFQ.