ADA4091-2/ADA4091-4 is a precision micropower, OVP, RRIO operational amplifier with single-supply operation, wide input voltage range, RRIO output swing, low supply current, wide bandwidth, low distortion, low drift, low offset voltage, no phase reversal, overvoltage protection (OVP) and other features. The product is suitable for industrial process control, battery-powered instruments, power supply control and protection, telecommunications, remote sensors, low voltage strain gage amplifiers, DAC output amplifiers and other occasions.
The ADA4091-2 dual and ADA4091-4 quad are micropower, single‑supply operational amplifiers with rail‑to‑rail inputs and outputs. They feature overvoltage protection, low supply current (200 pA/amplifier), a 1.2 MHz bandwidth, 0.46 V/µs slew rate, and a 250 pV maximum offset voltage.
Both devices are offered in surface‑mount packages: the ADA4091-2 in 8‑lead SOIC and 8‑lead LFCSP, and the ADA4091-4 in 14‑lead TSSOP and 16‑lead LFCSP. They are specified for an industrial temperature range of –40 °C to +125 °C. The datasheet includes pin configurations, electrical specifications, absolute maximum ratings, thermal resistance data, and typical performance characteristics.
| Supply voltage range (single‑supply) | 3.0 V to 30 V |
|---|---|
| Supply current per amplifier | 200 µA typical, 300 µA max |
| Slew rate | 0.46 V/µs |
| Gain‑bandwidth product | 1.22 MHz |
| Input offset voltage (typical) | ±250 pV |
| Power‑supply rejection ratio (PSRR) | 108 dB to 126 dB |
| Output voltage high (ADA4091-4, 100 kΩ load) | ≈4.99 V |
| Maximum supply voltage (absolute rating) | 36 V |
It operates from a single supply of 3.0 V to 30 V (or from +1.5 V to +15 V with dual supplies).
The OVP allows input voltage up to 25 V above or below the supply rails at a 5 V supply, and 12 V above or below at a 15 V supply.
The typical slew rate is 0.46 V/µs.
The supply current per amplifier is typically 200 µA and can reach up to 300 µA over temperature.