Linear LTC2992双路电源电压电流和功率监测解决方案
Linear公司的LTC2992是可测量两个电源电流,电压和功率的双路电源监测器,工作电压2.7V-100V,采用并联电阻可测量到大于100V电源,集成的两个8/12位ADC,不调整总误差小于±0.3%,主要用在通信基础设备,工业设备,汽车电子,计算机系统和服务器.本文介绍了LTC2992主要特性,框图,多种应用电路,以及演示板DC2561A主要特性,建立图,电路图,材料清单和PCB设计图.
The LTCR2992 is a rail-to-rail system monitor that measurescurrent, voltage, and power of two supplies. Itfeatures an operating range of 2.7V to 100V and includesa shunt regulator for supplies above 100V. The voltagemeasurement range of 0V to 100V is independent of theinput supply. Two ADCs simultaneously measure eachsupply’s current. A third ADC monitors the input voltagesand four auxiliary external voltages. Each supply’s currentand power is added for total system consumption. Minimumand maximum values are stored and an overrangealert with programmable thresholds minimizes the needfor software polling. Data is reported via a standard I2Cinterface. Shutdown mode reduces current consumptionto 25μA typically.
The LTC2992 I2C interface includes separate data inputand output pins for use with standard or opto-isolated I2Cconnections. The LTC2992-1 has an inverted data outputfor use with inverting opto-isolator configurations.
LTC2992主要特性:
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