The OPA227 and OPA228 series op amps combine low noise and wide bandwidth with high precision to make them the ideal choice for applications requiring both ac and precision dc performance. The OPA227 is unity-gain stable and features high slew rate (2.3V/µs) and wide bandwidth (8MHz). The OPA228 is optimized for closed-loop gains of 5 or greater, and offers higher speed with a slew rate of 10V/µs and a bandwidth of 33MHz. The OPA227 and OPA228 series op amps are ideal for professional audio equipment. In addition, low quiescent current and low cost make them ideal for portable applications requiring high precision. The OPA227 and OPA228 series op amps are pin-for-pin replacements for the industry standard OP-27 and OP-37 with substantial improvements across the board. The dual channel OPA4227 and OPA2227 are fully compatible replacements for the single channel OPA227 and OPA228.
The OPA227 and OPA228 operational amplifiers combine low noise, wide bandwidth, and high precision, making them suitable for data acquisition, telecom, audio, and instrumentation applications. Key features include low input bias current, high CMRR, and a wide supply range.
These devices are offered in DIP‑8, SO‑8, DIP‑14, and SO‑14 packages, operate from +2.5 V to +18 V, and are specified for temperatures from –40 °C to +85 °C. The datasheet includes detailed electrical specifications, absolute maximum ratings, mechanical dimensions, and typical performance curves.
| Low Noise | 3 nV/√Hz |
|---|---|
| Bandwidth (OPA227) | 8 MHz |
| Bandwidth (OPA228) | 33 MHz |
| Supply Voltage Range | +2.5 V to +18 V |
| Input Offset Voltage | 5 µV to 75 µV |
| Input Bias Current | ≤ 10 nA |
The devices operate from +2.5 V to +18 V.
They are offered in DIP‑8, SO‑8, DIP‑14, and SO‑14 packages.
The specified operating temperature range is –40 °C to +85 °C.
Typical input offset voltage is between 5 µV and 75 µV.