Texas Instruments MSP430F6725AIPN

Overview

MSP430F6725AIPN from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for single-phase electronic watt-hour metering applications. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver supporting up to 320 segments in 8-mux mode, three eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B module (I²C/SPI), and 128 KB flash/4 KB RAM in an 80-pin LQFP package.

For engineers reviewing the MSP430F6725AIPN datasheet, MSP430F6725AIPN pinout, MSP430F6725AIPN application, or MSP430F6725AIPN equivalent, key selection criteria include its dual SD24_B ADC architecture with differential PGA inputs, RTC with crystal offset calibration and temperature compensation, auxiliary supply subsystem for backup operation, and support for energy measurement accuracy compliance (e.g., IEC 62053-21/22).

Technical Context

The MSP430F6725AIPN implements a 16-bit RISC CPU with extended memory addressing and operates at up to 25 MHz using a unified clock system featuring FLL stabilization, VLO, REFO, and 32-kHz XT1 crystal support. Its power management includes an integrated LDO with programmable core voltage, supply supervision, brownout reset, and dual auxiliary power domains for RTC and backup memory.

Peripherals are optimized for metrology: two independent 24-bit SD24_B converters each support up to four differential input channels with programmable gain amplifiers; the 10-bit ADC provides six external and two internal channels (including temperature sensor); and the LCD_C module delivers contrast control with charge-pump bias generation for low-power display driving.

Key Specifications

Pinout & Package

The MSP430F6725AIPN is housed in an 80-pin LQFP (PN) package measuring 12 mm × 12 mm, with 52 general-purpose I/O pins, dedicated analog inputs for SD24_B and ADC10_A, auxiliary supply rails (AUXVCC1–3), and separate AVCC/DVCC domains for noise isolation in metrology designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6726AIPN and MSP430F6724AIPN, the MSP430F6725AIPN offers the optimal balance of memory resources (128 KB flash + 4 KB RAM) for field-upgradable, Class 0.2-compliant meters-providing headroom for security libraries and diagnostic features without over-provisioning RAM or sacrificing flash capacity.

Availability

MSP430F6725AIPN is available at Aetrix Electronics and suitable for single-phase watt-hour meters, utility data loggers, and prepayment meter controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing for global smart-grid deployments.

Supply support for MSP430F6725AIPN 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 analog signal chains.

The MSP430F672xA product line targets utility metering applications, integrating metrology-grade ADCs, RTC, LCD drivers, and ultra-low-power operation to meet international accuracy and longevity standards for revenue-grade energy measurement.

FAQ

What is the maximum operating frequency of the MSP430F6725AIPN?

The MSP430F6725AIPN supports a maximum system clock frequency of 25 MHz, enabled by its integrated FLL-controlled DCO and optional external crystal oscillator. This frequency allows real-time execution of complex metrology algorithms-including harmonic analysis and digital filtering-while maintaining ultra-low active-mode current consumption of 265 µA/MHz at 3.0 V.

How many 24-bit sigma-delta ADCs does the MSP430F6725AIPN integrate?

The MSP430F6725AIPN integrates two independent 24-bit sigma-delta ADCs (SD24_B modules), each supporting differential inputs with programmable gain amplifiers. This dual-converter architecture enables simultaneous sampling of voltage and current channels for accurate active/reactive energy calculation per IEC 62053-21, without time-skew errors inherent in multiplexed single-ADC solutions.

Does the MSP430F6725AIPN support LCD display driving?

Yes, the MSP430F6725AIPN includes an integrated LCD_C peripheral supporting up to 320 segments in 8-mux mode, with programmable contrast control and internal charge-pump bias generation. The LCDCAP pin connects to an external capacitor to generate boosted voltage, eliminating the need for external LCD bias ICs and simplifying design for cost-sensitive meter displays.

What low-power modes are available on the MSP430F6725AIPN?

The MSP430F6725AIPN offers five low-power modes: LPM0–LPM4 plus LPM3.5. Key modes include LPM3 (1.7 µA at 2.2 V) with RTC and watchdog active, LPM4 (1.6 µA at 3.0 V) with full RAM retention, and LPM3.5 (1.24 µA at 3.0 V) with only RTC running-enabling decade-long battery life in backup or tamper-detection scenarios while preserving time accuracy and critical state data.

Is the MSP430F6725AIPN pin-compatible with other devices in the MSP430F672x family?

Yes, the MSP430F6725AIPN shares identical 80-pin LQFP (PN) package pinout and signal mapping with all MSP430F672xAIPN variants-including MSP430F6726AIPN, MSP430F6724AIPN, and MSP430F6723AIPN-allowing direct substitution within the same footprint. Peripheral register compatibility ensures firmware reuse across variants, simplifying design scalability and inventory management.