LMP8278Q-Q1
- TCVos ±15μV/°C Max
- CMRR 80 dB Min
- Input Offset Voltage ±2 mV max
- CMVR −2V to 40V
- Operating Ambient Temperature Range −40°C to 125°C
- Single Supply Operation
- Min / Max Limits 100% Tested unless Otherwise Noted
- LMP8278Q Available in Automotive AEC-Q100 Grade 1 Qualified Version
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The LMP8278 is a fixed 14x gain precision current sense amplifier. The part amplifies and filters small differential signals in the presence of high common mode voltages. The part operates from a single 5V supply voltage. With an input common mode voltage range from -2V to +28V the gain is very precise (±0.5%). The part can handle common mode voltages in the range -2V to +40V with relaxed specifications. The LMP8278 is a member of the Linear Monolithic Precision (LMP) family and is ideal for unidirectional current sensing applications. The parameter values that are shown in the Electrical Characteristics table are 100% tested and all bold values are also 100% tested over temperature, unless otherwise noted.
The part has a precise gain of 14x which is adequate in most targeted applications to drive an ADC to its full scale value. The fixed gain is achieved in two separate stages, a preamplifier with a gain of 7x and an output stage buffer amplifier with a gain of 2x. The connection between the two stages of the signal path is brought out on two pins to enable the possibility to create an additional filter network around the output buffer amplifier. These pins can also be used for alternative configurations with different gain as described in .
The LMP8278Q incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies. Reliability qualification is compliant with the requirements and temperature grades defined in the AEC Q100 standard.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LMP8278Q High Mode, 14 x Gain, Precision Sensing Amplifier 数据表 (Rev. A) | 2013-3-22 | |||
| 应用手册 | 将印刷电路板覆铜迹线用作电流检测 分流电阻器 | PDF | HTML | PDF | HTML | 2026-5-6 | ||
| 应用手册 | 电流检测放大器的 ESD、EOS 和闩锁效应事件的风险和预防 | PDF | HTML | 英语版 | PDF | HTML | 2024-12-11 | |
| 电子书 | An Engineer's Guide to Current Sensing (Rev. B) | 2022-4-12 | ||||
| 电子书 | 简化电流感应 (Rev. A) | 2020-1-9 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
LMP8278MMEVAL — LMP8278MM 评估板
The LMP8278Q Evaluation Board is designed to evaluate the LMP8278Q current sense amplifier.
CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool
TIDA-00302 — 具有瞬态稳定性的电流分流监控器参考设计
这种高压侧电流分流监测器用于测量电流通过电流传感电阻器时电流传感电阻器两端产生的电压。
此外，还采用了外部保护电路来提供浪涌和快速瞬态保护，并展示 IEC61000-4-4 和 IEC61000-4-5 的不同抗扰度等级。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |