SD7211

Overview

SD7211 is a highly integrated power/energy-monitoring analog front end (AFE) IC for power-related measurements in energy-metering applications. It has an internal 8-channel ADC and a programmable DSP to support applications such as metering, power protection, and master/slave devices. SD7211 has internal MTP for storing chip configuration, DSP code, and calibration data. It provides an SPI slave interface for calibrating and programming data or DSP code. The MCU can be accessed through the SPI interface. SD7211 can diagnose power-related data to identify overload, short-circuit, leakage-current, and arcing conditions, enabling additional power-protection functions. It also provides a flexible architecture, low system BOM cost, and programmable solutions to help manufacturers reduce development work and design multifunctional, flexible products. Features: · 2-channel 24-bit Σ-Δ ADC · Internal 3.3V/5V-input, 1.8V-output capacitorless LDO · Internal 1.2V capacitorless VREF (after trimming, 0.1% accuracy over the full temperature range) · Internal 1X ~ 32X PGA (after calibration, 0.1% accuracy over the full temperature range) · Internal 16MHz RC OSC (after trimming, 5% accuracy over the full temperature range) · Internal VDT/POR and temperature sensor · Built-in FIR filter for each individual channel · Channel phase calibration · Programmable 48-bit DSP engine - 512 × 32 program space - 128 × 48 data space - 64 × 48 output buffer - Internal fixed-point-to-floating-point converter · 8KB OTP with 2 banks of DSP code, DSP CFG, and SYS CFG · Supports I2C/SPI/UART (UART supports automatic baud-rate mode) · Supports 38KHz IR carrier removal · Supports up to 9 GPIOs directly controlled by the DSP · 5V-tolerant I/O · Small package: 4 × 4 QFN24 Applications: · Smart plugs / power strips / PDU · Protective equipment / household appliances · Power monitors, hardware monitors

Applications

• Smart Plug/With/PDU
• Protective equipment/household appliances
• power monitor, hardware monitor