LMP8480-Q1
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the
Following Results:
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C6
- Bidirectional or Unidirectional Sensing
- Common Mode Voltage Range: 4.0 V to 76 V
- Supply Voltage Range: 4.5 V to 76 V
- Fixed Gains: 20, 60, and 100 V/V
- Gain Accuracy: ±0.1%
- Offset: ±80 µV
- Bandwidth (–3 dB): 270 kHz
- Quiescent Current: < 100 µA
- Buffered High-Current Output: > 5 mA
- Input Bias Current: 7 µA
- PSRR (DC): 122 dB
- CMRR (DC): 124 dB
The automotive-qualified LMP8480-Q1 and LMP8481-Q1 devices are precision, high-side, current-sense amplifiers that amplify a small differential voltage developed across a current-sense resistor in the presence of high input common-mode voltages. These amplifiers are designed for bidirectional (LMP8481-Q1) or unidirectional (LMP8480-Q1) current applications and accept input signals with a common-mode voltage range from 4 V to 76 V with a bandwidth of 270 kHz. Because the operating power-supply range overlaps the input common-mode voltage range, the LMP848x-Q1 can be powered by the same voltage that is being monitored. This benefit eliminates the need for an intermediate supply voltage to be routed to the point of load where the current is being monitored, resulting in reduced component count and board space.
The LMP848x-Q1 family consists of fixed gains of 20, 60, and 100 for applications that demand high accuracy over temperature. The low-input offset voltage allows the use of smaller sense resistors without sacrificing system error. The LMP8480-Q1 and LMP8481-Q1 are pin-for-pin replacements for the MAX4080 and MAX4081 devices, offering improved offset voltage, wider reference adjust range, and higher output drive capabilities. The LMP8480-Q1 and LMP8481-Q1 are available in an 8-pin VSSOP package.
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 | LMP848x-Q1 Automotive, 76-V, High-Side, High-Speed, Current-Sense Amplifier 数据表 (Rev. A) | PDF | HTML | 2017-2-24 | ||
| 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 | ||
| 用户指南 | LMP8480EVM Current Shunt Monitors Guide (Rev. A) | 2013-3-19 |
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）。
LMP848XMMEVM-X — LMP8480 和 LMP8481 评估工具
德州仪器 (TI) 的 LMP8480/81 评估模块 (EVM) 可帮助设计人员快速评估 LMP8480/81 76V 精密高侧电流感应放大器的操作和性能。EVM 可随时通过板载终端与电源、负载和测试仪表相连。
EVM 包含一个 LMP8480 或 LMP8481 高侧评估电路。EVM 在出厂时已预先装配好，安装了 LMP8480/81 器件、0.1O 感应电阻器、旁路电容器和连接终端。双向 EVM 包含 JP1 和 JP2 参考跳线和终端。
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 |