Dual op amp drawing 1 µA per channel — what that means for the BOM
The MAX407ESA+T from Maxim Integrated is a dual general-purpose operational amplifier in an 8-SOIC package, designed for applications where supply current is the primary constraint. Each of the two channels draws 1 µA of supply current, making this part a fit for battery-powered sensor interfaces, portable instrumentation, and always-on signal conditioning where every microamp counts. The rail-to-rail output stage allows the amplifier to swing close to the supply rails, preserving dynamic range in low-voltage systems.
8 kHz gain-bandwidth — the bandwidth budget
With a gain-bandwidth product of 8 kHz, this op amp is intended for low-frequency signals — think DC measurement, thermocouple or RTD conditioning, strain-gauge amplifiers, and low-speed comparator functions. It is not suited for audio or control loops above a few kilohertz. The 0.005 V/µs slew rate reinforces the same message: the part trades speed for extreme power economy.
Supply range and input characteristics
The supply span runs from 2.5 V minimum to 10 V maximum, covering single-cell Li-ion through 9 V battery or regulated 5 V and 10 V rails. Input bias current is 0.1 pA, which is FET-input territory — negligible for high-impedance sources like pH probes or photodiode amplifiers. Input offset voltage is specified at 1 mV, adequate for many general-purpose sensing tasks without external trimming. Each output can source or sink 600 µA.
Temperature grade and package
Rated for the industrial temperature range of -40°C to 85°C, the MAX407ESA+T suits outdoor telecom, factory-floor sensors, and automotive cabin environments. The 8-SOIC package is a standard footprint for dual op amps, making PCB layout and second-sourcing straightforward.
Lifecycle and sourcing posture
The MAX407ESA+T carries an active lifecycle status and is ROHS3 compliant.