EVALUATION KIT AVAILABLE MAX71020A Energy Measurement AFE General Description Benefits and Features The MAX71020A is a single-chip analog front-end (AFE) Best-in-Class Embedded Algorithms Support Highly for use in embedded energy measurement applica- Accurate Electricity Measurements tions. It contains the compute engine (CE) found in Voltage, Current, and Frequency Maxim Integrateds fourth-generation meter system-on- Active, Reactive, and Apparent Power/Energy chip (SoC) and an improved analog-to-digital converter Digital Temperature Compensation (ADC). It interfaces to a host controller of choice over a 40Hz70Hz Line Frequency Range and Phase SPI interface. Compensation (10) The MAX71020A comes in a 28-pin TQFN package. Advanced AFE with Exceptional Accuracy and Temperature Stability Applications Voltage Reference Temperature Coefficient: 40ppm/C (max) Grid-Friendly Appliances and Smart Plugs On-Chip Digital Temperature Sensor Power Distribution Units 24-Bit 2nd Order Delta-Sigma ADCs with Building Automation Systems 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 Ordering Information appears at end of data sheet. 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 Typical Operating Circuit NEUTRAL LOAD SHUNT LINE POWER SUPPLY LINE V V3P3A 3P3SYS GNDA GNDD IAP IAN RESISTIVE V A VOLTAGE DIVIDER V MAX71020A B IBP IBN COMPUTE ENGINE DIO XIN CS OSCILLATOR/PLL 9.8304MHz HOST CLK SPI MISO XOUT MOSI 19-7675 Rev 0 6/15MAX71020A Energy Measurement AFE Absolute Maximum Ratings (All voltages with respect to GNDA.) Digital Pins Voltage and Current Supplies and Ground Pins Inputs .................................(-10mA to +10mA), (-0.5V to +6V) V , V ...............................................-0.5V to +4.6V Outputs .........(-10mA to +10mA), (-0.5V to (V + 0.5V) 3P3SYS 3P3A 3P3SYS GNDD ...............................................................-0.1V to +0.1V Temperature and ESD Stress Analog Input Pins Operating Junction Temperature (peak, 100ms) .........+140C AP, IAN, IBP, IBN, Operating Junction Temperature (continuous) ............+125C VA, VB ............................(-10mA to +10mA), (-0.5V to +0.5V) Storage Temperature Range ........................ -45C to +165C XIN, XOUT ......................(-10mA to +10mA), (-0.5V to +3.0V) ESD Stress on All Pins .......................................... 4kV, HBM Lead Temperature (soldering, 10s) .............................+300C Soldering Temperature (reflow) ...................................+250C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. (Note 1) Package Thermal Characteristics TQFN Junction-to-Ambient Thermal Resistance ( ) ..........35C/W JA Junction-to-Case Thermal Resistance ( ) .................3C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS RECOMMENDED OPERATING CONDITIONS Precision metering operation 3.0 3.6 V and V Supply 3P3SYS 3P3A V Voltage Digital operation (Notes 2, 3) 2.8 3.6 Operating Temperature -40 +85 C INPUT LOGIC LEVELS Digital High-Level Input 2 V Voltage (V ) IH Digital Low-Level Input 0.8 V Voltage (V ) IL Input Pullup Current (I ) IL V = 3.6V, V = 0V 41 78 115 A 3P3SYS IN RESETZ Input Pullup Current (I ) IL V = 3.6V, V = 0V -1 0 +1 A 3P3SYS IN Other Digital Inputs Input Pulldown Current (I ) IH V = V -1 0 +1 A IN 3P3SYS All Pins Maxim Integrated 2 www.maximintegrated.com