OPA4188 运算放大器采用 TI 专有的自动归零技术,可在时间和温度范围内提供低偏移电压(25µV,最大值)以及近似为零的漂移。此类微型、高精度、低静态电流放大器提供高输入阻抗以及不超过
15mV 电源轨电压的轨到轨输出摆幅,非常适用于工业 集成电机驱动器解决方案。。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。
该器件的四路版本采用 14 引脚小外形尺寸集成电路 (SOIC) 封装和 14 引脚薄型小外形尺寸 (TSSOP) 封装。所有器件版本的额定工作温度范围均为 -40°C 至 +125°C。
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| Number of channels | 4 |
| 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) | 0.415 |
| Vn at 1 kHz (typ) (nV√Hz) | 8.8 |
| CMRR (typ) (dB) | 134 |
| 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) | 14 | 51.9 mm² 8.65 x 6 |
| TSSOP (PW) | 14 | 32 mm² 5 x 6.4 |