OPA188 运算放大器采用 TI 的专有自动归零技术,以提供低失调电压(最大为 25µV)并随时间推移和温度变化而实现接近零漂移的性能。此高精度低静态电流微型放大器提供高输入阻抗和摆幅为电源轨 15mV 之内的轨到轨输出。输入共模范围包括负电源轨。单电源或双电源可在 4V 至 36V(±2V 至 ±18V)范围内使用。
单通道版本采用微型 SOT-23-5、MSOP-8 和 SO-8 封装。所有版本的额定工作温度范围均为 -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 |
| Vos (offset voltage at 25°C) (max) (mV) | 0.025 |
| GBW (typ) (MHz) | 2 |
| Features | EMI Hardened, Zero Drift |
| Slew rate (typ) (V/µs) | 0.8 |
| Rail-to-rail | In to V-, Out |
| Offset drift (typ) (µV/°C) | 0.03 |
| Iq per channel (typ) (mA) | 0.425 |
| Vn at 1 kHz (typ) (nV√Hz) | 8.8 |
| CMRR (typ) (dB) | 146 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
| Input bias current (max) (pA) | 1400 |
| Iout (typ) (A) | 0.018 |
| Architecture | CMOS |
| Input common mode headroom (to negative supply) (typ) (V) | 0 |
| Input common mode headroom (to positive supply) (typ) (V) | -1.5 |
| Output swing headroom (to negative supply) (typ) (V) | 0.22 |
| Output swing headroom (to positive supply) (typ) (V) | -0.22 |
| 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 |