Packaging information
| Package | Pins SOIC (D) | 8 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the OPA2891
- Ultra-low 0.95nV/√Hz voltage noise
- High speed:
- 180MHz unity gain bandwidth
- 140MHz bandwidth at a gain of 2V/V (–1V/V)
- 105V/µs slew rate
- Very low distortion
- THD = –91dBc (f = 1MHz, RL = 150Ω)
- THD = –100dBc (f = 1MHz, RL = 1kΩ)
- THD+N = –137dBc (f = 1kHz, BW = 80kHz)
- Low 0.2mV (typical) and 1mV (maximum) input offset voltage at 25°C
- 200mA output current drive (typical)
- Typical operation from ±4.5V to ±18V
- Offset nulling pins on the OPA891
Description for the OPA2891
The OPA891 and OPA2891 (OPAx891) are ultra-low voltage noise, high-speed voltage feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communications and imaging. The single-amplifier OPA891 and the dual-amplifier OPA2891 offer very good ac performance with 140MHz bandwidth, gain (G) = 2V/V, 105V/µs slew rate, and 70ns settling time (0.1%). The OPAx891 are unity-gain stable with 180MHz bandwidth. These amplifiers have a high drive capability of 200mA and draw only 7.5mA supply current per channel. With –100dBc of total harmonic distortion (THD) at f = 1MHz and a very low noise of 0.95nV/√Hz, the OPAx891 are designed for applications requiring low distortion and low noise such as buffering analog-to-digital converters.