OPAx397 系列运算放大器(OPA397、OPA2397 和 OPA4397)具有超低失调电压、温漂以及输入偏置电流,可提供轨至轨输入和输出操作。除了精密直流精度,交流性能经优化可实现低噪声和快速稳定的瞬态响应。得益于这些特性,OPAx397 成为驱动高精度模数转换器 (ADC) 或缓冲高分辨率数模转换器 (DAC) 输出的理想选择。
OPAx397 采用 TI 的 e-trim™ 运算放大器技术,无需任何输入斩波或自动置零技术,即可实现超低失调电压以及失调电压温漂。此项技术可针对传感器输入或光电二极管电流至电压测量实现超低输入偏置电流,从而为光学模块或医疗仪表创建高性能跨阻级。
| 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) | 0.06 |
| GBW (typ) (MHz) | 13 |
| Features | e-Trim™ |
| Slew rate (typ) (V/µs) | 4.5 |
| Rail-to-rail | In, Out |
| Offset drift (typ) (µV/°C) | 0.16 |
| Iq per channel (typ) (mA) | 1.22 |
| Vn at 1 kHz (typ) (nV√Hz) | 6.5 |
| CMRR (typ) (dB) | 120 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
| Input bias current (max) (pA) | 1 |
| Iout (typ) (A) | 0.065 |
| Architecture | CMOS |
| Input common mode headroom (to negative supply) (typ) (V) | 0 |
| Input common mode headroom (to positive supply) (typ) (V) | 0 |
| Output swing headroom (to negative supply) (typ) (V) | 0.03 |
| Output swing headroom (to positive supply) (typ) (V) | 0.03 |
| THD + N at 1 kHz (typ) (%) | 0.00025 |
| SOT-23 (DBV) | 5 | 8.12 mm² 2.9 x 2.8 |