Texas Instruments MSP430F6723AIPZR

Overview

MSP430F6723AIPZR from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for single-phase energy metering applications. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver supporting up to 320 segments, three eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B module (I²C/SPI), four 16-bit timers, hardware multiplier, and RTC with crystal offset calibration - all in a 100-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6723AIPZR datasheet, MSP430F6723AIPZR pinout, MSP430F6723AIPZR application, or MSP430F6723AIPZR equivalent, key selection criteria include its dual SD24_B ADC architecture for current/voltage channel separation, auxiliary supply support for backup subsystem operation, low-power RTC modes (LPM3.5 at 1.24 µA), and metering-specific peripherals including SDCLK and SDxP/N inputs for external shunt/CT sensor interfacing.

Technical Context

The MSP430F6723AIPZR implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL stabilization, VLO and REFO internal sources, and XT1 32-kHz crystal support. Its power management includes an integrated LDO with programmable core voltage, supply supervision, brownout reset, and dual auxiliary supply rails (AUXVCC1/2/3) for isolated analog subsystem operation.

Peripherals are organized around metering signal chain requirements: SD24_B converters accept differential PGA inputs with dedicated SDCLK timing control; ADC10_A provides six external channels plus internal temperature sensor; eUSCI modules support automatic baud-rate detection for HART-compatible communication; and the LCD_C module includes integrated contrast control and segment mapping for direct drive of electromechanical or segment-based displays.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, exposed thermal pad not specified. Pinout validated per TI SLASE46A Rev. October 2018, Figure 4-1 and Table 4-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6724AIPZR and MSP430F6721AIPZR, the MSP430F6723AIPZR delivers optimal balance of memory resources and metrology performance - offering sufficient flash for certified meter firmware while maintaining pin-to-pin compatibility and identical low-power behavior across the PZ-package family.

Availability

MSP430F6723AIPZR is available at Aetrix Electronics and suitable for single-phase watt-hour meters, utility grid sensor nodes, and smart energy gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing for IEC 62053-certified designs.

Supply support for MSP430F6723AIPZR 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 for industrial, automotive, and consumer applications.

The MSP430F672xA product line is engineered specifically for precision energy metering, integrating metrology-grade ADCs, RTC with crystal calibration, and low-power LCD drivers to reduce system-level BOM and simplify IEC 62053 compliance.

FAQ

What is the maximum sampling rate supported by the SD24_B converters in the MSP430F6723AIPZR?

The MSP430F6723AIPZR's SD24_B converters support up to 256 kSPS aggregate sampling rate across both channels when configured for 16-bit resolution. At full 24-bit resolution, typical effective sampling rates are 1–4 kSPS per channel depending on oversampling ratio and filter settings - sufficient for 50/60 Hz fundamental and harmonic analysis in Class 0.2 meters.

Does the MSP430F6723AIPZR support crystal-less RTC operation?

No. The MSP430F6723AIPZR requires a 32.768-kHz crystal connected to XIN/XOUT for RTC operation in low-power modes LPM3.5 and LPM4.5. Internal VLO or REFO sources do not meet the timing accuracy requirements for revenue-grade metering; crystal-based RTC achieves ±1 ppm stability after factory calibration.

How many independent LCD commons does the MSP430F6723AIPZR support in 8-mux mode?

The MSP430F6723AIPZR supports eight independent COM outputs (COM0–COM7) in 8-mux mode, enabling direct drive of up to 320 segments (8 commons × 40 segments per common). This eliminates external LCD bias ICs and simplifies layout for front-panel displays in compact meter housings.

Can the MSP430F6723AIPZR perform simultaneous sampling on both SD24_B converters?

Yes. The MSP430F6723AIPZR supports synchronized start of conversion across both SD24_B modules using the SDCLK signal. This ensures phase-aligned sampling of voltage and current channels - essential for accurate power factor and reactive energy calculation without software-induced skew.

What is the function of the AUXVCC1, AUXVCC2, and AUXVCC3 pins on the MSP430F6723AIPZR?

AUXVCC1, AUXVCC2, and AUXVCC3 supply regulated power to the backup subsystem, including the RTC, 4×16-bit backup RAM, and auxiliary oscillators. These pins must be connected to clean, low-noise 3.3-V supplies independent of DVCC to maintain timing integrity and data retention during main supply interruption - a requirement for IEC 62053-21 compliant meters.