Dallas, Tex. – Texas Instruments (TI) has introduced three-phase metering systems-on-chip (SoCs) for smart electricity meters and portable measurement applications. The MSP430F67641 SoCs include high-performance delta-sigma analog-to-digital converters (ADCs) for energy measurement products requiring high accuracy across a wide dynamic range. An integrated 320-segment LCD eliminates the need for external drivers and enables developers to create smart energy measurement devices with detailed displays and extended language support, while still maintaining low-power consumption in sleep mode, said TI.
The MSP430F6779A metering SoCs also include advanced security and electrostatic discharge (ESD) features. A 128-bit Advanced Encryption Standard (AES) hardware-accelerated module speeds encryption time, as well as improves meter security and performance. With more flash memory integrated on-chip, smart grid developers can add more sophisticated metering features like multi-dwelling dynamic pricing, large buffers for interval data, DLMS/COSEM for meter data formatting, and communication stacks for both wired and wireless protocols.
The MSP430F67641 devices provide 0.5 percent accuracy while the MSP430F6779A devices provide Class 0.1 accuracy across a 2000:1 dynamic range through -40 to +85 degrees Celsius. The MSP430F67641 SoCs provide multiple low-power modes and power consumption as low as 0.78µA for developers that need to design ultra-low power metering devices.
Integrated on-chip memory (128KB flash on MSP430F67641 and 512KB flash on MSP430F6779A) allow developers to include communication stacks for both wired and wireless protocols, including ZigBee, wM-Bus, power line communication (PRIME, G3-PLC, IEEE-P1901.2) and RF mesh networks. Free Energy Library code performs all of the energy and power calculations required for ANSI/IEC qualified meters and provides a starting point for customers that are developing utility meter products, said TI.
The devices can be used with TI’s TPS54060 step-down converter that provides a regulated DC supply of 3.3V with low quiescent current to ensure full-speed operation of the MSP430F67641 and MSP430F6779A devices.
Availability: The MSP430F67641 and MSP430F6779A SoCs are available now as well as several development kits.
Pricing: The MSP430F67641 SoCs are priced at $2.85 in quantities of 1,000. Several development kits are available, including the MSP-TS430PEU128 programming and debug board ($117), MSP-FET430U128 flash emulation tool ($175), EVM430-F67641 evaluation module ($299). The MSP430F6779A metering SoCs are priced at $6.90 in quantities of 1,000 with the EVM430-F6779 evaluation module for $299.