Texas Instruments MSP430F6766AIPEUR

Overview

MSP430F6766AIPEUR from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates six independent 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 256KB flash, 16KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 128-pin LQFP package. It meets ANSI C12.20 and IEC 62053 standards for Class 0.2 accuracy over 2000:1 dynamic range.

For engineers reviewing the MSP430F6766AIPEUR datasheet, MSP430F6766AIPEUR pinout, MSP430F6766AIPEUR application, or MSP430F6766AIPEUR equivalent, key selection considerations include its 6-channel SD24_B ADC configuration, 90 GPIO count, RTC with tamper detection, ultra-low-power LPM3.5 mode (0.34 µA), and support for current transformers, Rogowski coils, and shunt sensors in revenue-grade metering systems.

Technical Context

The MSP430F6766AIPEUR implements a dedicated metrology subsystem with six synchronized 24-bit sigma-delta modulators feeding digital filters and calibration engines - enabling per-phase 4-quadrant active/reactive power, phase-angle, and energy computation. Its CPU executes TI's Energy Measurement Software Library to deliver kWh, kVARh, and demand values without external co-processing.

Dual-domain power architecture separates analog (AVCC/AVSS) and digital (DVCC/DVSS) supplies, with auxiliary rails (AUXVCC1–3) supporting sensor biasing and reference stability. The device supports flexible clocking via 32.768-kHz crystal (RTC), HF XTAL (up to 25 MHz), and internal DCO - with automatic failover and temperature-compensated crystal offset calibration.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, 0.5 mm pitch. Features 90 general-purpose I/O pins, dedicated metrology analog inputs (SDxP/N), segmented LCD outputs (COM0–COM7, S0–S39), and dual-domain power pins (AVCC/AVSS, DVCC/DVSS, VASYS/VDSYS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar polyphase metering applications.

Compared with MSP430F6766AIPEUR, the F6768AIPEUR provides greater firmware capacity for feature-rich AMI deployments, while the F6766AIPZ offers footprint reduction at the expense of I/O and display capability - both retain identical metrology accuracy and security architecture.

Availability

MSP430F6766AIPEUR is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade energy monitors, and AMI endpoint nodes requiring stable component supply, long-lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F6766AIPEUR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in low-power microcontrollers and precision metrology ICs.

The MSP430F6766AIPEUR belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for revenue-grade energy measurement in smart grid infrastructure - emphasizing accuracy, security, ultra-low-power operation, and regulatory compliance.

FAQ

What metrology accuracy does the MSP430F6766AIPEUR achieve under ANSI C12.20 and IEC 62053 standards?

The MSP430F6766AIPEUR achieves better than 0.1% error over a 2000:1 dynamic range for phase current measurements, meeting Class 0.2 accuracy per IEC 62053-21 and exceeding ANSI C12.20 requirements. This is enabled by its six 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated calibration engine - all validated across –40°C to +85°C.

Does the MSP430F6766AIPEUR support hardware-based energy pulse outputs for calibration?

Yes, the MSP430F6766AIPEUR includes dedicated hardware pulse output pins (CF1 and CF2) that generate active and reactive energy pulses synchronized to internal metrology calculations. These pulses are fully configurable in frequency and duty cycle, enabling direct calibration against reference watt-hour meters without CPU intervention or software timing overhead.

How does the MSP430F6766AIPEUR handle power loss during AC mains failure?

During AC mains failure, the MSP430F6766AIPEUR enters RTC mode (LPM3.5) consuming only 0.34 µA at 3 V, preserving timekeeping and tamper detection functionality. Its dual-domain power architecture allows seamless switchover to backup sources (battery/supercap), and the LCD continues operating at ultra-low power (3 µA in LPM3) to maintain display visibility.

Can the MSP430F6766AIPEUR interface directly with current transformers and shunt resistors?

Yes, the MSP430F6766AIPEUR supports both current transformers (CTs) and shunt resistors via its six differential SD24_B ADC inputs (SD0P/N through SD5P/N). It includes programmable gain amplifiers, digital phase correction for CT lag compensation, and ratiometric measurement using the VREF pin - eliminating need for external signal conditioning.

What security features are implemented in hardware on the MSP430F6766AIPEUR?

The MSP430F6766AIPEUR integrates hardware AES-128 encryption, password-protected RTC with dedicated tamper detection pins (TAMPER0–TAMPER2), memory protection unit (MPU), and secure bootloader (BSL) with fuse-based lock. These features collectively satisfy IEC 62053-31 anti-tamper requirements and enable secure firmware updates and encrypted data reporting.