OPA189、OPA2189 和 OPA4189 (OPAx189) 高精度运算放大器是超低噪声、快速稳定、零漂移器件,提供轨到轨输出,并具有独特的多路复用友好型架构和受控启动系统。这些功能和出色的交流性能,再加上单通道版本仅 0.4µV 的失调电压和 0.005µV/°C 的温漂,使 OPAx189 成为精密仪器、信号测量和有源滤波应用的理想选择。此外,多路复用器友好型输入架构可在施加较大输入差分电压时防止浪涌电流的产生,从而提高了多通道系统中的建立时间性能,同时还可在运输、操作和组装期间提供强大的 ESD 保护。
所有器件版本的额定工作温度范围为 -40°C 至 +125°C。
| 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) | 0.003 |
| GBW (typ) (MHz) | 14 |
| Features | EMI Hardened, High Cload Drive, MUX Friendly, Zero Drift |
| Slew rate (typ) (V/µs) | 20 |
| Rail-to-rail | In to V-, Out |
| Offset drift (typ) (µV/°C) | 0.005 |
| Iq per channel (typ) (mA) | 1.3 |
| Vn at 1 kHz (typ) (nV√Hz) | 5.2 |
| CMRR (typ) (dB) | 168 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
| Input bias current (max) (pA) | 300 |
| Iout (typ) (A) | 0.065 |
| Architecture | CMOS |
| Input common mode headroom (to negative supply) (typ) (V) | -0.1 |
| Input common mode headroom (to positive supply) (typ) (V) | -2.5 |
| Output swing headroom (to negative supply) (typ) (V) | 0.02 |
| Output swing headroom (to positive supply) (typ) (V) | -0.02 |
| THD + N at 1 kHz (typ) (%) | 0.00006 |
| 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 |