LTC2990CMS#TRPBF

Thermal Management Overview

The LTC2990CMS#TRPBF is a quad I2C voltage, current, and temperature monitor housed in a 10-lead MSOP package. It operates on a supply voltage range of 3V to 5.5V with an input supply current of 1.8mA during conversion. The device features a 14-bit ADC for voltage and current measurements, providing sub-millivolt resolution. Temperature accuracy is specified at ±0.5°C typical for remote diodes and ±1°C for the internal sensor. It includes four selectable I2C addresses and an internal 10ppm/°C reference.

Thermal Management Feature Summary

• Monitors system temperatures, voltages, and currents via a single I2C serial interface
• Measures two remote diode temperatures with high precision using internal bias circuitry
• Configurable functionality allows flexible combinations of internal and remote parameter acquisition
• Includes an internal low-drift voltage reference to minimize external supporting components

Thermal Management Applications

• System temperature monitoring
• Supply voltage monitoring
• Current measurement
• Remote data acquisition
• Environmental monitoring

Thermal Management Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the I2C address pins are configured correctly for the target bus topology. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision level.

Thermal Management Selection Notes

Select this component for applications requiring simultaneous multi-parameter monitoring within a compact footprint. The 10-lead MSOP package suits space-constrained designs. Consider the 14-bit resolution for precise differential voltage sensing. Evaluate the I2C interface compatibility with the host microcontroller. Verify that the required temperature sensors match the factory-calibrated ideality factor or allow for software compensation.

Thermal Management Part Context

This part belongs to the LTC2990 series of supervisory circuits designed for comprehensive system health monitoring. It integrates multiple sensing capabilities into a single IC, reducing bill-of-materials complexity. The series supports both standard and fast-mode I2C communication protocols. It is categorized under PMIC and supervisory circuits within power management solutions.

Thermal Management Replacement Considerations

LTC2990IMS#TRPBF: Industrial temperature grade variant (-40°C to 85°C).

Thermal Management FAQ

How does the LTC2990 handle remote diode temperature sensors with non-standard ideality factors?

The device is factory calibrated for an ideality factor of 1.004. For sensors with different factors, the measured Kelvin or Celsius temperature can be scaled using simple fixed-point math equations provided in the datasheet to compensate for the deviation.

What is the maximum differential input voltage allowed for current measurements?

The maximum differential voltage across inputs V1-V2 or V3-V4 is limited to ±300mV. This defines the full-scale input range for current sensing when used with an external sense resistor.