Single-supply op-amp for battery-powered signal chains
The MAX4481AXT+T is a single-circuit general-purpose operational amplifier from Analog Devices, designed for low-power, single-supply applications where board space is tight.
140 kHz gain bandwidth and 0.08 V/µs slew rate — what they mean for your circuit
The 140 kHz gain-bandwidth product sets the frequency where the open-loop gain drops to unity. For a closed-loop gain of 10, the usable signal bandwidth is about 14 kHz — adequate for audio-frequency filtering, thermocouple amplification, or low-speed data acquisition. The 0.08 V/µs slew rate limits the large-signal response: a 1 V peak output step slews in roughly 12.5 µs. This rules out fast pulse or square-wave applications above a few kilohertz but is fine for DC or slowly varying analog signals. Input bias current is 0.1 pA typical — the CMOS input stage draws negligible current from the source, so high-impedance sensors (photodiodes, pH probes, piezoelectric elements) see no significant loading error.
17 mA output drive and rail-to-rail swing
The 1 mV typical input offset voltage means the DC error at the output is under 10 mV for gains up to 10 — no external nulling required for most precision analog front-ends.
Housed in a 6-lead SC-70 (SOT-363) package, the MAX4481AXT+T occupies about 2 mm × 2 mm of board area — suitable for dense mixed-signal PCBs where every square millimeter counts.