Texas Instruments MSP430F6726AIPNR

Overview

MSP430F6726AIPNR 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 in 8-mux mode, three eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B module (I²C/SPI), and a password-protected RTC with crystal offset calibration - all operating from 1.8 V to 3.6 V supply.

For engineers reviewing the MSP430F6726AIPNR datasheet, MSP430F6726AIPNR pinout, MSP430F6726AIPNR application, or MSP430F6726AIPNR equivalent, key selection criteria include its dual SD24_B ADC architecture for current/voltage channel separation, auxiliary supply support for backup subsystem operation, LPM3.5 RTC-only shutdown mode (1.24 µA at 3.0 V), and 80-pin LQFP package with 52 GPIOs - critical for metering BOM consolidation and long-life battery-backed operation.

Technical Context

The MSP430F6726AIPNR implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL stabilization, VLO, REFO, and 32-kHz XT1 crystal support, and flexible power management including integrated LDO with programmable core voltage. Its peripheral set is optimized for metrology: SD24_B converters accept differential PGA inputs for high-accuracy current sensing, while the 10-bit ADC provides fast auxiliary measurements including on-chip temperature sensing.

Memory architecture includes 128 KB Flash and 8 KB RAM, with hardware multiplier enabling efficient firmware-based energy calculation (e.g., RMS, active/reactive power). The device supports serial onboard programming without external voltage and features three-channel DMA to offload data movement from CPU during concurrent ADC sampling and LCD refresh cycles.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, exposed thermal pad not specified. Pin functions validated per TI SLASE46A Rev. October 2018, Table 4-4 (PN package) and Figure 4-2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6725AIPNR, the MSP430F6726AIPNR adds integrated LCD driving capability and doubles RAM for complex tariff logic; versus MSP430F6736AIPN, it trades one SD24_B ADC and 20 I/Os for lower cost and smaller footprint - making it optimal for cost-constrained single-phase meters with display.

Availability

MSP430F6726AIPNR is available at Aetrix Electronics and suitable for single-phase electronic watt-hour meters, utility data loggers, and energy monitoring gateways requiring stable component supply, long-term lifecycle support, and TI-qualified metrology-grade silicon.

Supply support for MSP430F6726AIPNR 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 and energy monitoring applications, integrating metrology-optimized ADCs, RTC, LCD, and communication peripherals into a single ultra-low-power SoC to replace multi-chip meter designs.

FAQ

What is the maximum system clock frequency supported by the MSP430F6726AIPNR?

The MSP430F6726AIPNR 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 active power, and harmonic analysis while maintaining ultra-low active-mode current of 265 µA/MHz at 8 MHz and 3.0 V - verified in TI's SLASE46A datasheet Section 5.4.

Does the MSP430F6726AIPNR include hardware for energy calculation, or is firmware required?

The MSP430F6726AIPNR does not include dedicated hardware energy calculation accelerators; it relies on firmware executing on its 16-bit CPU with hardware multiplier support for 32-bit operations. However, its dual SD24_B ADCs, DMA engine, and timer peripherals are architected to minimize CPU load during sampling - enabling certified Class 0.5 metering firmware to run efficiently within its 128 KB Flash and 8 KB RAM resources.

How many analog input channels does the MSP430F6726AIPNR support for metrology-grade measurements?

The MSP430F6726AIPNR supports six external analog input channels plus two internal channels (including temperature sensor) via its 10-bit ADC, and up to eight differential inputs across its two 24-bit SD24_B sigma-delta converters - each SD24_B supports PGA gain settings (1×–32×) and programmable conversion rates up to 128 ksps, meeting IEC 62053-22 requirements for Class 0.5 accuracy.

Can the MSP430F6726AIPNR operate from a single 3.3-V supply, or are separate AVCC/DVCC rails required?

The MSP430F6726AIPNR requires separate analog (AVCC) and digital (DVCC) supply rails, both rated for 1.8 V to 3.6 V operation. AVCC must be decoupled independently from DVCC to maintain SD24_B ADC performance; the device also includes dedicated AUXVCC pins for backup subsystem isolation. Operating from a single 3.3-V rail is possible only if AVCC and DVCC are externally tied with appropriate filtering - but TI recommends independent regulation per SLASE46A Section 5.3.

What development tools are officially supported for the MSP430F6726AIPNR?

Texas Instruments officially supports the MSP430F6726AIPNR with the EVM430-F6736 evaluation module (designed for the F6736A but pin- and firmware-compatible with F6726A), Energy Measurement Design Center software, and Code Composer Studio v12+ with MSP430Ware driver libraries. TI also provides metrology-specific firmware examples, calibration utilities, and IEC 62053-compliant test vectors - all accessible via the MSP430F6726AIPNR product folder on ti.com.