Analog Devices Inc. AD8418A 电流感应放大器
亚德诺半导体 AD8418A 是一款高压、高分辨率分流放大器，设定的初始增益为 20V/V，在整个温度范围内的最大增益误差为±0.2%。该器件在 40°C 到 +125°C 的整个工作温度范围内都具有优异性能，适合汽车应用。该器件集成 EMI 滤波器和专利电路，在脉冲宽度调制(PWM)类输入共模电压下具有高输出精度。AD8418A 输入失调电压的典型值为 ±200μV，和达 86dB 出色的输入共模抑制比，DC 至 10kHz 范围，采用 2V 到 +70V 的电源电压。 零漂移核心实现整个工作温度和共模电压范围内典型值达 0.1 V/°C 的失调漂移。该设计使 D8418A 电流检测放大器能够在分流电阻上进行双向电流的测量，适合各种汽车和工业应用，包括电机控制、电池管理和电磁阀控制等。
The EMI filters and patented circuitry enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. AD8418A offers a typical input offset voltage of ±200μV and an excellent input common-mode rejection ratio of 86dB, dc to 10kHz from −2V to +70V. The zero drift core leads to a typical offset drift of 0.1μV/°C throughout the operating temperature and the common-mode voltage range.
The design makes the AD8418A Current Sense Amplifiers ideal for performing bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications including motor control, power management, and solenoid control.
特性
- Typical 0.1μV/°C offset drift
- Maximum ±400μV voltage offset over full temperature range
- 2.7V to 5.5V power supply operating range
- Electromagnetic interference (EMI) filters included
- High common-mode input voltage range
- Common-mode rejection ratio (CMRR): 86dB, dc to 10kHz
- Initial gain = 20V/V
- Wide operating temperature range:
- AD8418AWB: −40°C to +125°C
- AD8418AWH:−40°C to +150°C
- Bidirectional operation
- Available in 8-lead SOIC and 8-lead MSOP
- Qualified for automotive applications
