Texas Instruments MSP430F67461AIPZ

Overview

MSP430F67461AIPZ from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four independent 24-bit sigma-delta ADCs, 256KB flash, 16KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 standards, delivers <0.1% accuracy over 2000:1 dynamic range, and integrates LCD driver for up to 320 segments.

For engineers reviewing the MSP430F67461AIPZ datasheet, MSP430F67461AIPZ pinout, MSP430F67461AIPZ application, or MSP430F67461AIPZ equivalent, key selection criteria include metrology-grade ADC channel count, RTC tamper detection, pulse output capability for active/reactive energy calibration, and support for shunt/CT/Rogowski sensor interfaces in utility-grade metering designs.

Technical Context

The MSP430F67461AIPZ implements a dedicated metrology subsystem with four SD24_B sigma-delta modulators feeding independent digital filters, enabling simultaneous phase current and voltage measurement across three phases plus neutral. Its 25-MHz CPU with 32-bit hardware multiplier executes real-time energy calculations-including 4-quadrant power, exact phase-angle, and temperature-compensated kWh-without external co-processing.

Dual-supply architecture separates analog (AVCC/AVSS), digital (DVCC/DVSS), and system (VASYS/VDSYS) domains, with on-chip auxiliary supplies (AUXVCC1–3) powering precision analog front-end components. The device uses a 32768-Hz crystal oscillator with RTC offset calibration and supports single-point line frequency calibration from 40 Hz to 70 Hz.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch, 62 GPIOs including dedicated metrology analog inputs and pulse outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67471AIPZ and MSP430F67661AIPZ, the MSP430F67461AIPZ offers optimal balance of metrology precision, memory resources, and cost for standard 3-phase 4-wire star-connected meters where neutral current measurement is not required.

Availability

MSP430F67461AIPZ is available at Aetrix Electronics and suitable for 3-phase smart electricity meters, revenue-grade submetering systems, and AMI endpoint nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F67461AIPZ 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 specializing in analog, embedded processing, and connectivity technologies with leadership in low-power microcontrollers and precision metrology solutions.

The MSP430F67461AIPZ belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for ANSI/IEC-compliant energy measurement in utility, industrial, and building automation applications - emphasizing accuracy, security, and ultra-low-power operation.

FAQ

What metrology standards does the MSP430F67461AIPZ comply with?

The MSP430F67461AIPZ 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, and temperature-compensated design are validated against these standards in TI's Energy Measurement Design Center (EMDC) calibration workflow. MSP430F67461AIPZ achieves this without external precision references or trimming components.

How many independent sigma-delta ADC channels does the MSP430F67461AIPZ support?

The MSP430F67461AIPZ integrates four independent 24-bit sigma-delta ADC channels (SD24_B) with differential inputs and programmable gain. These are assigned to phase current and voltage measurements in 3-phase 4-wire configurations - typically SD0/SD1 for Phase A/B current, SD2 for Phase C current, and SD3 for neutral or voltage sensing. MSP430F67461AIPZ does not support SD4–SD6 channels, unlike higher-tier F676x/F677x variants.

Does the MSP430F67461AIPZ include hardware-based security features?

Yes, the MSP430F67461AIPZ includes password-protected RTC with tamper detection (voltage, frequency, temperature, and case intrusion monitoring), AES-128 encryption acceleration, and battery-backed SRAM for secure key storage. These features satisfy IEC 62053-31 security requirements for revenue-grade meters. MSP430F67461AIPZ implements them in dedicated hardware blocks - no software overhead or external security IC needed.

What is the lowest power consumption mode supported by the MSP430F67461AIPZ?

The MSP430F67461AIPZ supports Shutdown Mode (LPM4.5) with 0.18 µA supply current at 3 V, retaining RTC operation and critical registers while disabling all clocks and peripherals. This mode enables >10-year operation on a CR2032 coin cell during AC mains failure. MSP430F67461AIPZ achieves this via segmented power gating and ultra-low-leakage process technology - verified in TI's SLAS983A datasheet Section 5.5.

Can the MSP430F67461AIPZ drive an LCD display directly?

Yes, the MSP430F67461AIPZ includes an integrated LCD_C controller supporting up to 320 segments with software-configurable bias, frame frequency, and contrast control. It drives common-electrode LCDs with up to 4 backplanes (COM0–COM7) and requires only external capacitors (LCDCAP, R33). MSP430F67461AIPZ eliminates external LCD drivers in compact meter designs - confirmed in Section 1.1 Features and Section 5.15 of the datasheet.