The MAX4490/MAX4491/MAX4492 is a low-cost CMOS operational amplifier featuring Rail-to-Rail® input and output capability from either a single 2.7V to 5.5V supply or dual ±1.35V to ±2.75V supplies. These amplifiers exhibit a high slew rate of 10V/µs and a gain-bandwidth product of 10MHz. They can drive 2kΩ resistive loads to within 55mV of either supply rail and remain unity-gain stable with capacitive loads up to 300pF. The MAX4490 is offered in the ultra-small, 5-pin SC70 package, which is 50% smaller than the standard 5-pin SOT23 package. Specifications for all parts are guaran- teed over the automotive (-40°C to +125°C) tempera- ture range.
The MAX4490, MAX4491 and MAX4492 are CMOS operational amplifiers offering rail‑to‑rail input and output over a single 2.7 V‑5.5 V supply or dual ±1.35 V‑±2.75 V supplies. They feature a 10 V/µs slew rate, 10 MHz gain‑bandwidth product, and can drive 2 kΩ loads within 55 mV of either rail while remaining unity‑gain stable with capacitive loads up to 300 pF.
These devices are qualified for automotive temperature ranges (‑40 °C to +125 °C) and are offered in ultra‑small 5‑pin SC70 packages (MAX4490) as well as SOT‑23‑5 and TSSOP options for the other variants. The datasheet provides absolute maximum ratings, typical electrical characteristics, pin configurations, and application guidance for low‑power, battery‑powered, and sensor‑amplifier designs.
| Supply Voltage Range (single) | 2.7 V to 5.5 V |
|---|---|
| Supply Voltage Range (dual) | ±1.35 V to ±2.75 V |
| Slew Rate | 10 V/µs |
| Gain‑Bandwidth Product | 10 MHz |
| Input Bias Current | 50 pA |
| Output Short‑Circuit Current | ±50 mA |
| Maximum Capacitive Load | 300 pF |
| Operating Temperature Range | -40 °C to +125 °C |
| Package (MAX4490) | 5‑pin SC70 |
They operate from a single 2.7 V to 5.5 V supply or from dual ±1.35 V to ±2.75 V supplies.
They remain stable with capacitive loads up to 300 pF.
The input bias current is typically 50 pA.
They are guaranteed over the automotive temperature range of –40 °C to +125 °C.