LinearLTC2991 Octal I2C Voltage, Current and Temperature Monitoring Solution

/a>I2C” title=”I2C”>I2C” title=”I2C”>I2C serial port system voltage, current and temperature monitor, temperature measurement accuracy is 0.7 degrees C, resolution is 0.06 degrees C, PWM temperature output, 14-bit ADC is used to measure voltage/current, the working voltage is 3V to 5.5V, and the internal reference voltage is 10ppm/℃. It is mainly used in temperature measurement, power monitoring, current measurement, remote control data acquisition and environmental monitoring. This article introduces the main Features, block diagrams, and various application circuits including motor protection and regulation circuits, computer voltage and temperature monitoring circuits, and battery monitoring circuits.

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 main features:

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 application:

Temperature Measurement

Supply Voltage Monitoring

Current Measurement