Linear LTC2991八路I2C电压电流和温度监测方案

2011年09月24日 22:23 发布者：1046235000

Linear公司的LTC2991是八路I2C串口的系统电压,电流和温度监测器,温度测量精度为0.7度C,分辨率为0.06度C,PWM温度输出,采用14位ADC来测量电压/电流,工作电压3V到5.5V,内部有10ppm/℃的基准电压,主要用在温度测量,电源监测,电流测量,遥控数据采集和环境监测.本文介绍了LTC2991主要特性,方框图,以及包括马达保护和调整电路, 计算机电压和温度监测电路与电池监测电路在内的多种应用电路.

LTC2991: Octal I2C Voltage, Current, and Temperature Monitor

The LTC.2991 is used to monitor system temperatures, voltages and currents. Through the I2C serial interface, the eight monitors can individually measure supply voltages and can be paired for differential measurements of current sense resistors or temperature sensing transistors.

Additional measurements include internal temperature and internal VCC. The internal 10ppm reference minimizes the number of supporting components and area required.Selectable address and configurable functionality give the LTC2991 flexibility to be incorporated in various systems needing temperature, voltage or current data. The LTC2991 fits well in systems needing submillivolt voltage resolution, 1% current measurement and 1℃ temperature accuracy or any combination of the three.

LTC2991主要特性:

Measures Voltage, Current, Temperature

Measures Four Remote Diode Temperatures

0.7℃ (Typ) Accuracy, 0.06℃ Resolution

1℃ (Typ) Internal Temperature Sensor

Series Resistance Cancellation

14-Bit ADC Measures Voltage/Current

PWM Temperature Output

3V to 5.5V Supply Operating Voltage

Eight Selectable Addresses

Internal 10ppm/℃ Voltage Reference

V1 to V8 Inputs ESD Rated to 6kV HBM

16-Lead MSOP Package

LTC2991应用:

Temperature Measurement

Supply Voltage Monitoring

Current Measurement

Remote Data Acquisition

Environmental Monitoring