Texas Instruments MSP430F6725AIPZR

Overview

MSP430F6725AIPZR from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for precision energy metering applications. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver supporting up to 320 segments, real-time clock with crystal offset calibration, and three enhanced USCI modules (two UART/IrDA/SPI + one I²C/SPI) - all in a 100-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6725AIPZR datasheet, MSP430F6725AIPZR pinout, MSP430F6725AIPZR application, or MSP430F6725AIPZR equivalent, key selection criteria include its dual SD24_B ADC architecture for simultaneous voltage/current measurement, integrated RTC with temperature compensation for billing accuracy, low-power LPM3.5 mode (1.24 µA), and dedicated auxiliary supply domain for backup subsystem operation.

Technical Context

The MSP430F6725AIPZR implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL stabilization, VLO/REFO/XT1 sources, and programmable LDO core regulation. Its peripheral set targets single-phase watt-hour metering: dual 24-bit SD24_B ADCs support differential PGA inputs with internal reference, while the 10-bit ADC provides auxiliary sensing including on-chip temperature.

It features four 16-bit timers (one with three capture/compare registers, three with two each), three-channel DMA, hardware multiplier for 32-bit operations, and password-protected RTC with alarm and crystal calibration. The device supports serial onboard programming without external voltage and includes contrast-controlled LCD_C module with 8-mux capability.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), body size 14 mm × 14 mm, lead pitch 0.5 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6726AIPZR, the MSP430F6725AIPZR trades 4 KB RAM for lower unit cost while retaining identical metrology ADC performance; versus MSP430F6735AIPZR, it omits one SD24_B channel but reduces system complexity and power in single-phase designs.

Availability

MSP430F6725AIPZR is available at Aetrix Electronics and suitable for single-phase watt-hour meters, utility smart meter modules, and portable energy analyzers requiring stable component supply across multi-year production cycles.

Supply support for MSP430F6725AIPZR 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 and embedded processing technologies, with decades of expertise in ultra-low-power design and metrology-grade precision analog IP.

The MSP430F672xA family was engineered specifically for revenue-grade energy measurement, integrating metrology-optimized ADCs, RTC, LCD, and low-power modes to replace discrete metering ASICs in cost-sensitive single-phase applications.

FAQ

What is the maximum system clock frequency supported by the MSP430F6725AIPZR?

The MSP430F6725AIPZR supports a maximum system clock frequency of 25 MHz, enabled by its integrated FLL control loop and DCO oscillator. This speed allows real-time execution of metrology algorithms such as RMS, fundamental frequency, and harmonic analysis while maintaining ultra-low active-mode current of 265 µA/MHz at 3.0 V. The MSP430F6725AIPZR achieves this performance without external clock components beyond the required 32-kHz crystal for RTC.

Does the MSP430F6725AIPZR support crystal calibration for the RTC?

Yes, the MSP430F6725AIPZR includes password-protected RTC functionality with built-in crystal offset calibration and temperature compensation. This feature allows the device to maintain time accuracy within ±1 ppm over temperature and aging, critical for revenue-grade billing applications. Calibration data is stored in nonvolatile memory and applied automatically during RTC initialization - no external calibration hardware or host intervention is required for the MSP430F6725AIPZR.

How many independent 24-bit ADC channels does the MSP430F6725AIPZR integrate?

The MSP430F6725AIPZR integrates two independent 24-bit sigma-delta ADCs (SD24_B modules), each supporting differential PGA inputs, programmable gain, and internal reference. These ADCs operate concurrently and are synchronized for phase-accurate voltage and current sampling - a core requirement for Class 0.2 single-phase watt-hour meters. The MSP430F6725AIPZR does not include a third SD24_B channel, distinguishing it from the MSP430F673xA series.

What LCD segment count and mux configuration does the MSP430F6725AIPZR support?

The MSP430F6725AIPZR features the LCD_C peripheral supporting up to 320 segments in 8-mux mode, with integrated contrast control via internal resistor ladder. This eliminates the need for external bias generation circuitry and simplifies PCB layout. The device provides 8 common outputs (COM0–COM7) and supports static or multiplexed drive configurations - enabling direct interface to standard 4-digit, 7-segment + icon displays commonly used in utility meters. All LCD timing and charge-pump functions are managed autonomously by the MSP430F6725AIPZR.

Is the MSP430F6725AIPZR pin-compatible with other devices in the MSP430F672x family?

Yes, the MSP430F6725AIPZR is fully pin-compatible with all 100-pin LQFP (PZ) variants in the MSP430F672x family, including MSP430F6726AIPZR, MSP430F6724AIPZR, and MSP430F6723AIPZR. Pin mapping, power domains, and peripheral signal locations are identical across these devices. This allows drop-in replacement during design iteration or volume production - for example, upgrading to MSP430F6726AIPZR for additional RAM requires no PCB change, and the MSP430F6725AIPZR can be substituted into existing layouts targeting any PZ-package MSP430F672x device.