ISL28278, ISL28478 Dual Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Precision Op-Amp
The ISL28278 (dual‑channel) and ISL28478 (quad‑channel) are micropower precision op‑amps optimized for single‑supply operation down to 2.4 V. They feature rail‑to‑rail input and output, an Input Range Enhancement Circuit that maintains CMRR at the supply rails, and very low supply current while delivering excellent DC‑accuracy, noise performance, and output drive.
Typical applications include battery‑ or solar‑powered systems, handheld consumer products, medical devices, thermocouple amplifiers, photodiode pre‑amps, and pH‑probe amplifiers. Ordering information, pin‑out diagrams, absolute maximum ratings, and detailed electrical specifications are provided, along with package dimensions for the 16‑lead QSOP family.
| Supply Voltage Range | 2.4 V – 5.5 V |
|---|---|
| Input Offset Voltage | ±225 µV (max) |
| Input Bias Current | 30 pA typ |
| Gain Bandwidth Product | 300 kHz |
| Power‑Supply Rejection Ratio (PSRR) | 100 dB typ |
| Common‑Mode Rejection Ratio (CMRR) | 100 dB typ |
| Supply Current (Enabled) | 120 µA typ per channel |
| Package | 16‑lead QSOP |
The devices can operate with a supply voltage as low as 2.4 V.
Yes, they are available in a Pb‑free plus anneal version that is RoHS compliant.
Typical supply current per enabled channel is 120 µA.
Both parts are offered in a 16‑lead QSOP (Quarter‑size Outline Plastic) package.