The MAX71020A is a single-chip analog front-end (AFE) for use in embedded energy measurement applications. It contains the compute engine (CE) found in Maxim Integrated’s fourth-generation meter system-on-chip (SoC) and an improved analog-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. Applications * Building Automation Systems * Grid-Friendly Appliances and Smart Plugs * Power Distribution Units * Best-in-Class Embedded Algorithms Support Highly Accurate Electricity Measurements * Voltage, Current, and Frequency * Active, Reactive, and Apparent Power/Energy * Digital Temperature Compensation * 40Hz–70Hz Line Frequency Range and Phase Compensation (±10°) * Advanced AFE with Exceptional 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 * Small, 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