Energy measurement AFE; electricity meter technology for IoT applications
The part contains the compute engine (CE) found in Maxim Integrated’s fourth-generation meter system-on-chip (SoC) and an improved analogue-to-digital converter (ADC). It interfaces to a host controller of choice over a SPI interface. The MAX71020A comes in a 28-pin TQFN package.
Features include;
– Optimised embedded algorithms support highly accurate electricity measurements
Voltage, current, and frequency
Active, reactive, and apparent power/energy
Digital temperature compensation
40 Hz–70Hz line frequency range and phase compensation (±10°)
– Advanced AFE with accuracy and temperature stability
Voltage reference temperature coefficient: 40ppm/°C (max)
On-chip digital temperature sensor
24-bit 2nd order delta-sigma ADCs with differential and single-ended inputs
±0.1% Wh accuracy over 2000:1 current range
– Highly integrated features support compact design cycles and reduced bill of materials
28-Pin TQFN package
Digital Temperature compensation
Low power consumption
Less than 5mA (typ) consumption at 3.3V
Simple host interface
SPI slave
Atomic measurements outputs
DIO or SPI-Based status signals
Use the part, Maxim suggests, in building automation systems; grid-friendly appliances and smart plugs; or in power distribution units.
Maxim Integrated; https://www.maximintegrated.com/en/products/industries/metering-energy-measurement/MAX71020A
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