OPA391 和 OPA2391 ( OPAx391) 在高精度放大器中具有高带宽 (1MHz) 和超低静态电流 (24µA) 的独特组合。这些特性加上轨到轨输入和输出,使这些器件成为高增益、低功耗应用的理想选择。10fA 的超低输入偏置电流、仅 45µV 的失调电压(最大值)和 1.2µV/°C 的温漂有助于在具有严苛低功耗要求的比例式传感器和电流分析传感器前端中保持高精度。
OPAx391 使用德州仪器 (TI) 专有的 e‑trim™ 运算放大器技术,实现了超低失调电压和低输入温漂的独特组合,无需任何输入切换或自动置零技术。基于 CMOS 的技术平台还采用现代、稳健的输出级设计,可耐受高输出电容,从而缓解典型低功耗放大器中常见的稳定性问题。
| Number of channels | 1 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 5.5 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 1.7 |
| Vos (offset voltage at 25°C) (max) (mV) | 0.045 |
| GBW (typ) (MHz) | 1 |
| Features | e-Trim™ |
| Slew rate (typ) (V/µs) | 1 |
| Rail-to-rail | In, Out |
| Offset drift (typ) (µV/°C) | 1 |
| Iq per channel (typ) (mA) | 0.0235 |
| Vn at 1 kHz (typ) (nV√Hz) | 60 |
| CMRR (typ) (dB) | 121 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
| Input bias current (max) (pA) | 0.8 |
| Iout (typ) (A) | 0.06 |
| Architecture | CMOS |
| Input common mode headroom (to negative supply) (typ) (V) | -0.1 |
| Input common mode headroom (to positive supply) (typ) (V) | 0.1 |
| Output swing headroom (to negative supply) (typ) (V) | 0.003 |
| Output swing headroom (to positive supply) (typ) (V) | -0.003 |
| THD + N at 1 kHz (typ) (%) | 0.002 |
| SOT-SC70 (DCK) | 5 | 4.2 mm² 2 x 2.1 |