Linear LTC2991八路I2C電壓電流和溫度監測方案

發布時間：2011-9-24 22:23 發布者：1046235000

Linear公司的LTC2991是八路I2C串口的系統電壓,電流和溫度監測器,溫度測量精度為0.7度C,分辨率為0.06度C,PWM溫度輸出,采用14位ADC來測量電壓/電流,工作電壓3V到5.5V,內部有10ppm/℃的基準電壓,主要用在溫度測量,電源監測,電流測量,遙控數據采集和環境監測.本文介紹了LTC2991主要特性,方框圖,以及包括馬達保護和調整電路, 計算機電壓和溫度監測電路與電池監測電路在內的多種應用電路.

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應用:

Temperature Measurement

Supply Voltage Monitoring

Current Measurement

Remote Data Acquisition

Environmental Monitoring