Texas Instruments MSP430F6726AIPN

Overview

MSP430F6726AIPN 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, real-time clock with crystal offset calibration, and three eUSCI_A modules for UART/IrDA/SPI plus one eUSCI_B for I²C/SPI - all in an 80-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6726AIPN datasheet, MSP430F6726AIPN pinout, MSP430F6726AIPN application, or MSP430F6726AIPN equivalent, key selection criteria include its dual SD24_B ADC architecture for current/voltage channel separation, integrated RTC with temperature compensation for meter accuracy over temperature, low-power standby consumption of 1.7 µA (LPM3), and 52 GPIOs optimized for meter peripheral interfacing and tamper detection.

Technical Context

The MSP430F6726AIPN 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 power management supports multiple low-power modes (LPM3/LPM4/LPM3.5/LPM4.5) with sub-µA shutdown currents and 3-µs wake-up latency.

Peripherals are tightly coupled to metrology requirements: two independent SD24_B converters support simultaneous voltage and current sampling with differential PGA inputs; the 10-bit ADC provides auxiliary sensing (e.g., temperature, supply monitoring); and the LCD_C module includes integrated contrast control and charge pump for direct segment drive without external components.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, exposed thermal pad not present, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6725AIPN, the MSP430F6726AIPN provides double the RAM for larger calibration datasets and secure boot code; versus MSP430F6736AIPN, it trades one SD24_B channel for lower cost and power while retaining full single-phase metrology capability.

Availability

MSP430F6726AIPN is available at Aetrix Electronics and suitable for single-phase energy metering, utility prepayment systems, and smart grid sensor nodes requiring stable component supply, long-term lifecycle support, and TI-qualified metrology-grade silicon.

Supply support for MSP430F6726AIPN 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-optimized peripherals - including dual SD24_B ADCs, temperature-compensated RTC, and LCD driver - to eliminate external components and reduce system-level BOM cost.

FAQ

What is the maximum system clock frequency supported by the MSP430F6726AIPN?

The MSP430F6726AIPN supports a maximum system clock (MCLK) frequency of 25 MHz, enabled by its integrated FLL control loop and DCO oscillator. This allows real-time execution of metrology algorithms, LCD refresh, and communication stacks without external clock sources. The device achieves this speed while maintaining ultra-low active-mode current of 265 µA/MHz at 3.0 V, making it suitable for battery-backed or energy-harvesting meter designs where processing throughput and power efficiency are both critical.

Does the MSP430F6726AIPN include hardware support for AES encryption?

No, the MSP430F6726AIPN does not include dedicated AES hardware acceleration. It relies on software-based cryptographic libraries executed on its 16-bit CPU. However, its hardware multiplier (MPY32) significantly accelerates modular arithmetic operations used in AES-128 key expansion and round functions, enabling acceptable performance for secure token validation in prepayment meters. For higher-throughput security, designers may pair the MSP430F6726AIPN with a companion secure element such as the TI TISCI200.

How many independent 24-bit ADC channels does the MSP430F6726AIPN provide?

The MSP430F6726AIPN integrates two independent 24-bit sigma-delta ADC modules (SD24_B), each with differential PGA inputs and configurable gain settings. These are specifically designed for simultaneous voltage and current sampling in single-phase watt-hour meters. Unlike the MSP430F6736AIPN (which has three SD24_B modules), the MSP430F6726AIPN's dual-channel configuration meets IEC 62053-21 Class 0.5S accuracy requirements while optimizing die size and power consumption for cost-sensitive meter deployments.

Can the MSP430F6726AIPN drive a 320-segment LCD directly without external components?

Yes, the MSP430F6726AIPN's integrated LCD_C peripheral supports up to 320 segments in 8-mux mode using only an external 2.2 µF capacitor on the LCDCAP pin. It includes an internal charge pump, programmable contrast control, and four COM outputs (COM0–COM3), eliminating the need for external LCD bias ICs or discrete resistor networks. This integration reduces BOM count, PCB area, and design validation effort - a key advantage for certified meter designs where component qualification cycles impact time-to-market.

What is the typical current consumption of the MSP430F6726AIPN in RTC-only mode with crystal?

In LPM3.5 (shutdown RTC mode) with 32-kHz crystal active, the MSP430F6726AIPN consumes 1.24 µA at 3.0 V. This mode retains RTC functionality, crystal oscillator, and supply supervisor while powering down the CPU, flash, RAM, and most peripherals. It is designed for battery-backed meter operation where timekeeping accuracy must be maintained for >10 years on a single CR2032 coin cell - meeting ANSI C12.20 and IEC 62053-62 requirements for long-term backup operation.