OPA145 和 OPA2145 (OPAx145) 器件属于低功耗 JFET 输入放大器系列,具有出色的漂移、低电流噪声和皮安级输入偏置电流。这些特性使得 OPAx145 非常适合放大高阻抗传感器产生的小信号。
现代的单电源精密模数转换器 (ADC) 和数模转换器 (DAC) 可实现轨到轨输出摆幅特性。此外,包括 V– 的输入范围可以让设计人员简化电源管理并充分利用单电源低噪声 JFET 架构。
| Number of channels | 1 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 36 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 4.5 |
| Vos (offset voltage at 25°C) (max) (mV) | 0.15 |
| GBW (typ) (MHz) | 5.5 |
| Slew rate (typ) (V/µs) | 20 |
| Rail-to-rail | In to V-, Out |
| Offset drift (typ) (µV/°C) | 0.4 |
| Iq per channel (typ) (mA) | 0.445 |
| Vn at 1 kHz (typ) (nV√Hz) | 7 |
| CMRR (typ) (dB) | 140 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
| Input bias current (max) (pA) | 10 |
| Iout (typ) (A) | 0.02 |
| Architecture | FET |
| Input common mode headroom (to negative supply) (typ) (V) | -0.1 |
| Input common mode headroom (to positive supply) (typ) (V) | -3.5 |
| Output swing headroom (to negative supply) (typ) (V) | 0.1 |
| Output swing headroom (to positive supply) (typ) (V) | -0.1 |
| THD + N at 1 kHz (typ) (%) | 0.0001 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
| SOT-23 (DBV) | 5 | 8.12 mm² 2.9 x 2.8 |
| VSSOP (DGK) | 8 | 14.7 mm² 3 x 4.9 |