TI MSP430F67641AIPZR

The MSP430F676x1A multi-phase metering SoC is a highly integrated and powerful solution for revenue meters. It can achieve accurate metering with few external components and low system cost. The MSP430F676x1A uses a low-power MSP430 CPU and a 32-bit multiplier to perform all energy calculations, enabling metering functions in various applications such as rate management and communication with AMR or AMI modules.

The MSP430F676x1A employs TI's 24-bit Σ - Δ converter technology with an accuracy better than 0.5%. Members of the product family include up to 128KB of flash memory, 8KB of RAM, and an LCD controller supporting up to 320 segments.

The ultra-low power consumption property of the MSP430F676x1A means that the system power supply can be minimized to reduce the overall cost. The lowest standby power means that the standby energy storage can be minimized, and critical data can be retained for a longer time in case of a main power failure.

The MSP430F676x1A series executes TI's energy measurement software library, which can calculate all relevant energy and power results. The energy measurement software library is provided free of charge with the MSP430F676x1A. Industrial standard development tools and hardware platforms can also be used to accelerate the development of meters compliant with all ANSI and IEC standards globally.

• Phase current accuracy <0.5% over a dynamic range exceeding 2000:1, meeting or exceeding ANSI C12.20 and IEC 63053 standards
• Supports multiple sensor types including current transformers, Rogowski coils, and shunts
• Four-quadrant measurement per phase or accumulated phases for power measurement of up to 3 phases, with precise phase angle measurement
• Digital phase correction for current transformers
• 40Hz to 70Hz line frequency range using single-point calibration
• Flexible power supply options with automatic switching support
• During AC mains failure, display operates at ultra-low power: 3μA in LPM3
• RTC module powered by dedicated supply (AUXVCC3) with integrated offset voltage and temperature calibration
• Multiple communication interfaces for smart metering applications
• High-performance 25MHz CPU with 32-bit multiplier
• Up to 128KB flash with single-cycle execution
• Up to 8KB RAM with single-cycle access
• Up to 3 independent 24-bit Σ-Δ ADCs with differential inputs and variable gain
• System ADC: 10-bit, 200ksps, 6 channels with temperature sensor and supply measurement
• Wide supply voltage range: 1.8V to 3.6V
• Ultra-low power during energy measurement – 3.0mW at 10MHz operation (3.0V)
• Multiple low-power modes:
  • Standby mode (LPM3): 2.5μA at 3V, wake-up in 3μs (typical)
  • RTC mode (LPM3.5): 1.24μA at 3V (typical)
  • Shutdown mode (LPM4.5): 0.78μA at 3V (typical)
• LCD driver with up to 320 segments and contrast control
• Password-protected RTC with crystal offset calibration and temperature compensation
• 4 communication ports: configurable among 4 UART, 3 SPI, and 1 I²C interfaces
• Four 16-bit timers, each with 9 capture/compare registers
• 100-pin LQFP (PZ) package with 72 I/O pins
• 80-pin LQFP (PN) package with 52 I/O pins
• Industrial temperature range: -40℃ to 85℃
• Development tools (see also Tools & Software): Polyphase Energy Meter with MSP430F67641 SoC (EVM430-F67641)

• Three-phase electronic energy meter
• Utility meter metering
• Energy monitoring