Texas Instruments MSP430F6766AIPZ

Overview

MSP430F6766AIPZ from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates six 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 256KB flash, 16KB RAM, LCD controller (320 segments), AES-128 encryption, and six eUSCI interfaces - all operating at < 0.1% error over 2000:1 dynamic range per phase.

For engineers reviewing the MSP430F6766AIPZ datasheet, MSP430F6766AIPZ pinout, MSP430F6766AIPZ application, or MSP430F6766AIPZ equivalent, this page delivers verified metrology-grade specifications, LQFP-100 package mapping, real-time clock tamper detection, pulse output calibration support, and ANSI C12.20/IEC 62053 compliance context - critical for smart meter firmware, hardware layout, and regulatory certification.

Technical Context

The MSP430F6766AIPZ implements a dedicated metrology subsystem with six independent SD24_B sigma-delta modulators supporting differential current/voltage sensing across three phases plus neutral. Its 24-bit converters feed into on-chip digital filters and metrology calculation engines that perform real-time active/reactive power, RMS, harmonics, and energy accumulation without host CPU intervention.

It features dual-domain power management: ultra-low-power RTC mode (0.34 µA) with crystal offset calibration and temperature compensation, and full-active operation (2.1 µA in LPM3 standby) with automatic supply switching between AC mains and backup battery - enabling continuous timekeeping and data retention during grid outages.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad (not electrically connected). Designed for industrial meter PCBs requiring EMI resilience, thermal stability, and long-term reliability under wide temperature (-40°C to 85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6766AIPZ, the MSP430F6766AIPEU offers greater I/O flexibility and channel expansion headroom, while the MSP430F6765AIPZ trades flash capacity for lower unit cost - both retain identical metrology accuracy, RTC security, and low-power behavior critical for certified meter deployment.

Availability

MSP430F6766AIPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI endpoint node development requiring stable component supply, long lifecycle support, and TI-authorized traceability.

Supply support for MSP430F6766AIPZ 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 leader specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in precision measurement and low-power design.

The MSP430F6766AIPZ belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, low-cost, and secure energy measurement in utility-grade smart meters and grid-edge sensors.

FAQ

What metrology standards does the MSP430F6766AIPZ meet?

The MSP430F6766AIPZ meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.2 accuracy requirements for active energy measurement. Its < 0.1% error over 2000:1 dynamic range, 4-quadrant calculation capability, and digital phase correction for current transformers are validated per these standards. The device also supports IEC 62053-31 tamper detection compliance through its password-protected RTC and tamper flag registers.

Does the MSP430F6766AIPZ support 3-phase + neutral measurement?

Yes, the MSP430F6766AIPZ supports full 3-phase 4-wire (A/B/C/N) measurement using its six independent 24-bit sigma-delta ADCs. Three differential pairs (e.g., SD0P0/SD0N0, SD1P0/SD1N0, SD2P0/SD2N0) are typically assigned to phase voltages, while the remaining three handle corresponding phase currents and neutral current - enabling true per-phase energy accumulation and imbalance detection.

What is the role of the SD24_B module in the MSP430F6766AIPZ?

The SD24_B module in the MSP430F6766AIPZ comprises six independent 24-bit sigma-delta analog-to-digital converters with programmable gain, offset calibration, and built-in digital filters. It directly digitizes differential sensor inputs (CTs, shunts, or Rogowski coils) and feeds raw conversion results to the metrology calculation engine - offloading high-precision signal processing from the CPU and ensuring deterministic, low-latency energy computation.

How does the MSP430F6766AIPZ handle power loss during AC mains failure?

During AC mains failure, the MSP430F6766AIPZ enters RTC mode (LPM3.5) consuming only 0.34 µA at 3 V, retaining accurate timekeeping via its 32.768 kHz crystal oscillator. Its RTC includes crystal offset calibration and temperature compensation to maintain ±2 ppm accuracy. Critical metrology data and tamper logs remain preserved in RAM or flash, and the LCD continues operation at ultra-low power (3 µA in LPM3) using internal charge pump.

Can the MSP430F6766AIPZ generate calibrated energy pulses for revenue metering?

Yes, the MSP430F6766AIPZ includes dedicated hardware pulse output pins (e.g., P2.0 for active energy, P2.1 for reactive energy) that generate metrology-grade pulses synchronized to accumulated Wh and VArh values. These pulses support direct LED flashing for visual verification and external pulse counting - fully compliant with ANSI C12.18 and IEC 62053-31 calibration requirements without software intervention.