Analog Devices Inc. AD8418 电流检测放大器
Analog Devices AD8418 电流检测放大器的设定初始增益为20V/V，在整个温度范围内的最大增益误差为 ±0.15%。缓冲输出电压可以直接与任何典型转换器连接。AD8418在输入共模电压处于-2V至+70V范围时，具有出色的输入共模抑制性能。它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。在-40℃至+125℃的整个温度范围内，AD8418都能提供极佳的性能。它采用零漂移内核，在整个工作温度范围和共模电压范围内，失调漂移典型值为0.1μV/℃。Analog Devices AD8418完全符合汽车应用规范，集成了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。
The AD8418 offers breakthrough performance throughout the -40°C to +125°C temperature range. It features a zero drift core, which leads to a typical offset drift of 0.1µV/°C throughout the operating temperature range and the common-mode voltage range. Analog Devices AD8418 current sense amplifier is fully qualified for automotive applications and includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages.
特性
- Typical 0.1µV/°C offset drift
- Maximum ±400µV voltage offset over full temperature range
- 2.7 V to 5.5V power supply operating range
- Electromagnetic interference (EMI) filters Included
- Initial gain = 20V/V
- -40°C to +125°C temperature range
- Bidirectional operation
- Available in 8-lead SOIC and 8-lead MSOP
- Common-mode rejection ratio (CMRR) of 86dB, dc to 10kHz
- Qualified for automotive applications
应用
- High-side current sensing
- Low-side current sensing
- Diagnostic protection
Associated Evaluation Board
The AD8418-EVALZ Evaluation Board is designed to aid in the evaluation of the AD8418 current sense amplifiers. AD8418-EVALZ enables quick breadboarding/protoyping of AD8418 current sense amplifiers and is easily configurable for unidirectional or bidirectional operation.