Microchip announces its next generation of energy-measurement analogue front end (AFE), the MCP3911, which features two 24-bit, delta-sigma ADCs that operate at 3V with industry-leading accuracy of 94.5 dB SINAD and 106.5dB THD.
This provides better energy-meter and power-monitoring performance by accurately measuring from start-up to maximum current, and enables faster calibration during production. Four different power modes offer the flexibility of enabling either extremely low-power designs, to 0.8mA per channel, or designs for higher-speed signals and harmonic content. The extended temperature range allows operation from -40°C to +125°C.
The MCP3911 features 2.7 to 3.6V analogue and digital operation, which simplifies the interface by running off the same power rail as the microcontroller. An internal, low-temperature-coefficient voltage reference, along with PGAs on each channel, further enables metering and monitoring designs.
As the global energy-metering infrastructure is being upgraded and the power-monitoring market is growing, designers of energy-measurement and other signal-acquisition applications are looking for ways to increase performance whilst lowering costs. Microchip is meeting these needs with the industry’s most accurate AFEs, which reduce power consumption with their low-power modes, and reduce costs by decreasing the number of power rails and external components.