Summary of 30A, PCB-level supply monitor has integrated 300 µΩ sense resistor
### Summary Linear Technology's power monitors address the growing complexity of electronic designs by offering integrated solutions for accurate voltage, current, and power monitoring. These devices combine interfaces, amplifiers, ADCs, and multipliers to ensure efficiency across industrial, telecom, automotive, and consumer applications. Models like the LTC2990/LTC2991 support 3V–5.5V systems with high configurability, while the LTC2945 handles up to 80V, the LTC2946 up to 100V, and the LTC2947 integrates a sense resistor for rails up to ±30A. The LT2940 is designed for AC or instantaneous power measurement in 4V–80V systems.
Parts used in the Linear Technology Power Monitors Project:
- LTC2990 quad/octal I2C power monitor
- LTC2991 quad/octal I2C power monitor
- LTC2945 power monitor (0V to 80V range)
- LTC2946 energy reading monitor (up to 100V)
- LTC2947 power monitor with integrated sense resistor
- LT2940 analog power and current monitor
- Current sense amplifiers
- Analog-to-digital converters (ADCs)
- Multiplexers
- Analog multipliers
- I2C interface
Power Monitors
As today’s electronic designs continue to grow in complexity, managing power consumption and optimizing overall efficiency become even more important. Accurate power supply voltage and current monitoring is crucial to conserving power and guaranteeing reliability in everything from industrial and telecom applications, to automotive and consumer electronics. Measuring power consumption, as well as other critical parameters, and optimizing overall efficiency can be a challenge with discrete solutions. Linear Technology’s power monitors combine the necessary interfaces, current sense amplifiers, ADCs, multiplexers and/or analog multipliers to monitor power, resulting in solutions that have the relevant dynamic range, sensitivity and accessibility to address a wide variety of applications.
One size does not fit all when it comes to power monitors, since each power monitoring application is typically very unique. Nevertheless, Linear Technology’s power monitors provide high configurability without compromising performance or functionality. The LTC2990/LTC2991 quad/octal I2C power monitors can be configured up to 35 different ways, perfect for 3V to 5.5V systems that need simple and accurate digital monitoring of combinations of temperature, voltage and current. If higher voltages are required, then the LTC2945 and its 0V to 80V operating range also allows users to accurately monitor current, voltage and power via an I2C interface. The LTC2946 provides energy readings for rails up to 100V, while the LTC2947 integrates a sense resistor and provides energy readings for rails up to +/-30A. For measuring AC or instantaneous power, the LT2940 analog power and current monitor for 4V to 80V systems brings together the necessary circuits to accurately measure, monitor and control power.
For more detail: 30A, PCB-level supply monitor has integrated 300 µΩ sense resistor
- What is crucial for conserving power in complex electronic designs?
Accurate power supply voltage and current monitoring. - Can Linear Technology power monitors be configured for different applications?
Yes, they provide high configurability without compromising performance or functionality. - How many ways can the LTC2990/LTC2991 be configured?
They can be configured up to 35 different ways. - What is the operating range of the LTC2945?
The LTC2945 has an operating range of 0V to 80V. - Does the LTC2947 integrate a sense resistor?
Yes, the LTC2947 integrates a sense resistor. - For what type of power measurement is the LT2940 designed?
The LT2940 is designed for measuring AC or instantaneous power. - Which system voltages do the LTC2990/LTC2991 support?
They are perfect for 3V to 5.5V systems. - What components do Linear Technology power monitors combine?
They combine interfaces, current sense amplifiers, ADCs, multiplexers, and/or analog multipliers.
