The MCP3911 features two 24-bit, delta-sigma ADCs that operate at 3V with industry-leading accuracy of 94.5 dB SINAD and 106.5 dB 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 offers the flexibility of enabling either extremely low-power designs, to 0.8 mA 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 also features 2.7 to 3.6V analog and digital operation, which simplifies the interface by running off of 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 while lowering costs. This AFE reduces power consumption with their low-power modes and reduces costs by decreasing the number of required power rails and external components.
|VDD||-0.3V to 4.0V|
|Digital inputs and outputs w.r.t. AGND||-0.3V to 4.0V|
|Analog input w.r.t. AGND||-2V to +2V|
|VREF input w.r.t. AGND||-0.6V to VDD +0.6V|
|Storage temperature||-65°C to +150°C|
|Ambient temp. with power applied||-65°C to +125°C|
|Soldering temperature of leads (10 seconds)||+300°C|
|ESD on the analog inputs (HBM,MM)||4.0 kV, 200V|
|ESD on all other pins (HBM,MM)||4.0 kV, 200V|