REF1925参考设计电路|低漂移、低功率电压基准应用电路

REF1925低漂移、低功率电压基准提供出色的温漂（最大值25ppm/°C）和初始精度（0.1%）（在VREF和VBIAS两个输出端），同时工作时静态电流小于430µA。此篇主要介绍了REF1925特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

REF1925特性：低压差：10mV；高输出电流：±20mA；线性调节率：3ppm/V；负载调节率：8ppm/mA

REF1925典型应用范围：功率逆变器；电机控制；电流检测；工业过程控制；数据采集系统

REF1925参考设计应用电路：

图1REF1925内部结构图

The REF19xx offers excellent temperature drift (25 ppm/°C, max) and initial accuracy (0.1%) on both the VREF and VBIAS outputs while operating at a quiescent current less than 430 碌A. In addition, the VREF and VBIAS outputs track each other with a precision of 6 ppm/°C (max) across the temperature range of –40°C to 85°C.

图2REF1925参考设计图

The low-drift, bidirectional, single-supply, low-side, current-sensing solution described in this section can accurately detect load currents from –2.5 A to 2.5 A. The linear range of the output is from 250 mV to 2.75 V. Positive current is represented by output voltages from 1.5 V to 2.75 V, whereas negative current is represented by output voltages from 250 mV to 1.5 V.

REF1925中文数据手册:点击下载

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