TI MSP430F67621IPZ

The MSP430F676x1 polyphase metering SoC is a powerful, highly integrated solution for revenue meters that achieves accurate metering with minimal external components at low system cost. The F676x1 uses the low-power MSP430 CPU and a 32-bit multiplier to perform all energy calculations, enabling metering functions across a variety of applications such as tariff management and communication with AMR or AMI modules. The F676x1 incorporates TI's 24-bit Σ-Δ converter technology with accuracy better than 0.5%. Family members include up to 128KB of Flash and 8KB of RAM, along with an LCD controller supporting up to 320 segments.

The ultra-low power characteristics of the F676x1 allow the system power supply to be minimized, reducing overall cost. Minimum standby power means backup energy storage can be minimized and critical data can be retained for longer periods when the main power supply fails. The F676x1 family runs TI's energy management software library, which calculates all relevant energy and power results. The energy management software library is provided free of charge with the F676x1. Industry-standard development tools and hardware platforms are also available to accelerate worldwide development of meters compliant with all ANSI and IEC standards.

• 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
• Power measurement for up to 3 phases; four-quadrant measurement per phase or accumulated phases; precise phase angle measurement; digital phase correction for current transformers
• 40Hz to 70Hz line frequency range with 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 sigma-delta 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 (LPM3): 2.5μA at 3V, wake-up within 3μs (typical) – RTC mode (LPM3.5): 1.24μA at 3V (typical) – Shutdown (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 meters
• Utility metering
• Energy monitoring