General Description

The MAX71020 is a single-chip analog front-end (AFE) for use in high-performance revenue meters. 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), and interfaces to the host controller of choice over a SPI interface.

The MAX71020 comes in a 28-pin TSSOP package.

Features

♦ 0.1 Accuracy Over 2000:1 Current Range

♦ Exceeds IEC 62053/ANSI C12.20 Standards

♦ Two Differential Current Sensor Inputs

♦ Two Voltage Sensor Inputs

♦ Selectable Gain of 1 or 8.9 for One Current Input to Support a Shunt

♦ High-Speed Wh/VARh Pulse Outputs with Programmable Width

♦ Up to Four Pulse Outputs with Pulse Count

♦ Four-Quadrant Metering

♦ Digital Temperature Compensation

♦ Independent 32-Bit Compute Engine

♦ 45Hz to 65Hz Line Frequency Range with Same Calibration

♦ Phase Compensation (±10°)

♦ Four Multifunction DIO Pins

♦ SPI Interface

♦ -40°C to +85°C Industrial Temperature Range

♦ 28-Pin TSSOP Lead(Pb)-Free Package