Texas Instruments MSP430F6726AIPZ

Overview

MSP430F6726AIPZ 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, DMA, and RTC with crystal offset calibration - all in a 100-pin LQFP package.

For engineers reviewing the MSP430F6726AIPZ datasheet, MSP430F6726AIPZ pinout, MSP430F6726AIPZ application, or MSP430F6726AIPZ 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 LCD contrast control and temperature-compensated RTC.

Technical Context

The MSP430F6726AIPZ implements a 16-bit RISC CPU with 25-MHz system clock capability and flexible power management via integrated LDO, supply supervision, and dual auxiliary supplies. Its unified clock system includes FLL stabilization, VLO, REFO, and 32-kHz XT1 crystal support - enabling precise timing for metrology-grade sampling synchronization.

Peripherals are architected for concurrent high-accuracy measurement and display: SD24_B converters operate with differential PGA inputs and independent reference paths; the 10-bit ADC provides fast auxiliary sensing (e.g., temperature); and the LCD_C module supports static/4-mux/8-mux configurations with programmable bias and contrast control - all coordinated via three-channel DMA to minimize CPU intervention.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, standard JEDEC footprint with exposed thermal pad (not electrically connected). Pin functions include dedicated analog inputs (SD0P0–SD1N0, A0–A5), auxiliary supply rails (AUXVCC1–AUXVCC3, VASYS, VDSYS), LCD segment/common drivers (COM0–COM7, S0–S39), and multiplexed digital I/O with configurable secondary functions (eUSCI, Timer, RTC).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power metrology microcontroller applications.

Compared with MSP430F6725AIPZ, the MSP430F6726AIPZ provides 4 KB more RAM for larger accumulation buffers and enhanced communication stacks; compared with MSP430F6736AIPZ, it omits the third SD24_B channel and reduces ADC10_A external inputs - delivering lower BOM cost while retaining full single-phase metrology capability.

Availability

MSP430F6726AIPZ is available at Aetrix Electronics and suitable for single-phase watt-hour meters, utility grid sensor nodes, and portable power quality analyzers requiring stable component supply, long-term lifecycle support, and TI-qualified metrology-grade silicon.

Supply support for MSP430F6726AIPZ 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 analog and low-power design.

The MSP430F6726AIPZ belongs to TI's ultra-low-power metrology MCU product line, engineered specifically for ANSI C12.20 and IEC 62053-compliant electricity meters - integrating high-resolution ADCs, secure RTC, and LCD drivers to reduce system-level BOM count.

FAQ

What is the maximum sampling rate supported by the SD24_B converters in the MSP430F6726AIPZ?

The MSP430F6726AIPZ SD24_B converters support up to 1024 samples per second per channel with 24-bit resolution and >100-dB SNR. This rate is configurable via oversampling ratio and filter settings, and is synchronized across both converters using the shared SD24_B clock domain - essential for phase-accurate voltage/current acquisition in single-phase metering applications where the MSP430F6726AIPZ is deployed.

Does the MSP430F6726AIPZ support hardware-accelerated cryptographic operations?

No, the MSP430F6726AIPZ does not include dedicated cryptographic hardware. It relies on software-based implementations (e.g., AES-128 via ROM code library) for secure boot and DLMS/COSEM authentication. Security features are limited to password-protected RTC access, JTAG fuse disable, and BSL lock - making the MSP430F6726AIPZ suitable for cost-sensitive meters where hardware crypto is not mandated by regional certification bodies.

How many LCD segments can the MSP430F6726AIPZ drive, and what mux configurations are supported?

The MSP430F6726AIPZ LCD_C module drives up to 320 segments in 8-mux mode, or 160 segments in 4-mux mode, or 40 segments in static mode. It supports programmable contrast control, internal bias generation, and automatic frame frequency adjustment - eliminating external components. This capability is fully utilized in the MSP430F6726AIPZ's target applications, such as multi-tariff residential meters requiring dynamic display updates without CPU overhead.

What are the key differences between the MSP430F6726AIPZ and MSP430F6726AIPN packages?

The MSP430F6726AIPZ uses a 100-pin LQFP (14 mm × 14 mm) with 72 GPIOs and full peripheral mapping including all SD24_B inputs and LCD segment drivers. The MSP430F6726AIPN is an 80-pin LQFP (12 mm × 12 mm) variant with only 52 GPIOs and reduced analog input count (3 external ADC10_A channels vs. 6). Both share identical core functionality, but the MSP430F6726AIPZ is required for full-featured single-phase meters needing maximum I/O and metrology channel density.

Can the MSP430F6726AIPZ operate from a single 3.3-V supply, or are separate analog/digital rails required?

The MSP430F6726AIPZ requires three distinct supply domains: DVCC/DVSS for digital core and I/O (1.8–3.6 V), AVCC/AVSS for analog peripherals (1.8–3.6 V), and VASYS/VDSYS for auxiliary subsystem (1.8–3.6 V). While DVCC and AVCC may be tied together in simplified designs, doing so degrades SD24_B performance due to digital noise coupling - TI recommends separate LDOs and split-plane PCB layout. This multi-rail requirement is fundamental to the MSP430F6726AIPZ's metrology-grade accuracy.