Texas Instruments MSP430F6720AIPZ

Overview

MSP430F6720AIPZ from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for single-phase electronic watt-hour metering. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, three 16-bit timers, four eUSCI modules (three UART/IrDA/SPI and one I²C/SPI), LCD driver supporting up to 320 segments, and RTC with crystal offset calibration - all in a 100-pin LQFP package.

For engineers reviewing the MSP430F6720AIPZ datasheet, MSP430F6720AIPZ pinout, MSP430F6720AIPZ application, or MSP430F6720AIPZ equivalent, key selection criteria include standby current (1.7 µA in LPM3), sigma-delta ADC channel count (2), flash size (16 KB), RAM (1 KB), and support for auxiliary supply subsystems enabling isolated RTC operation.

Technical Context

The MSP430F6720AIPZ implements a 16-bit RISC CPU with extended memory addressing and constant generators for optimized code efficiency. Its unified clock system includes FLL stabilization, VLO and REFO internal sources, and 32-kHz crystal support for precise RTC timing.

Power management features a fully integrated LDO with programmable core voltage, supply supervision with brownout detection, and dual auxiliary power domains - one dedicated to backup subsystem (RTC, XT1, 4×16-bit backup RAM) and another for analog front-end isolation.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body, 0.5 mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6720AIPZ, the MSP430F6721AIPZ and MSP430F6723AIPZ offer scalable flash/RAM while preserving pin compatibility, metrology ADC performance, and low-power modes - enabling hardware reuse across meter tiers without layout changes.

Availability

MSP430F6720AIPZ is available at Aetrix Electronics and suitable for single-phase watt-hour meters, energy monitoring gateways, and utility grid node sensors requiring stable component supply, long-term lifecycle support, and metrology-grade accuracy certification.

Supply support for MSP430F6720AIPZ 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 for industrial, automotive, and consumer applications.

The MSP430F672xA product line targets utility metering and precision sensing, integrating high-resolution sigma-delta ADCs, ultra-low-power operation, and metrology-specific peripherals like password-protected RTC and auxiliary supply domains.

FAQ

What is the maximum system clock frequency supported by the MSP430F6720AIPZ?

The MSP430F6720AIPZ supports a maximum system clock (MCLK) frequency of 25 MHz, enabled by its integrated FLL control loop. This allows real-time execution of metrology algorithms such as RMS calculation, harmonic analysis, and DLMS protocol handling while maintaining ultra-low active-mode current (265 µA/MHz at 8 MHz). The device achieves this performance using its 16-bit RISC CPU and hardware multiplier (MPY32), making the MSP430F6720AIPZ suitable for time-critical metering tasks without compromising power efficiency.

Does the MSP430F6720AIPZ support crystal-based real-time clock operation?

Yes, the MSP430F6720AIPZ supports crystal-based RTC operation using a 32-kHz external tuning-fork crystal connected to XIN/XOUT pins (pins 24 and 25). Its RTC_C module includes crystal offset calibration and temperature compensation features, achieving ±1 ppm accuracy over temperature and aging. In LPM3.5 mode, the RTC remains active with full RAM retention at just 1.24 µA at 3.0 V - a critical capability for time-of-use billing and tamper-event timestamping in the MSP430F6720AIPZ.

How many analog input channels does the MSP430F6720AIPZ support for metrology measurements?

The MSP430F6720AIPZ supports six external analog input channels for the 10-bit ADC and up to six differential inputs across its two 24-bit sigma-delta ADCs (SD24_B). Specifically, it provides dedicated SD0P0/SD0N0, SD1P0/SD1N0, and SD2P0/SD2N0 pins - though SD2P0/SD2N0 are no-connect on this variant. Combined with internal temperature sensor and VCC monitoring channels, the MSP430F6720AIPZ delivers flexible signal acquisition for voltage, current, and auxiliary parameters in single-phase metering designs.

What communication interfaces are integrated into the MSP430F6720AIPZ?

The MSP430F6720AIPZ integrates four enhanced universal serial communication interfaces: three eUSCI_A modules supporting UART, IrDA, and SPI, and one eUSCI_B module supporting I²C and SPI. These enable concurrent communication with optical probes (IrDA), PLC modems (SPI), external security ICs (I²C), and host MCUs (UART). All modules support automatic baud-rate detection and clock source flexibility - essential for interoperability in heterogeneous utility networks where the MSP430F6720AIPZ serves as the primary metrology controller.

Is the MSP430F6720AIPZ pin-compatible with other devices in the MSP430F672x family?

Yes, the MSP430F6720AIPZ is pin-compatible with all 100-pin LQFP (PZ) variants in the MSP430F672x family, including MSP430F6721AIPZ through MSP430F6726AIPZ. They share identical pinouts, power domains, and peripheral mappings - differences are limited to flash/RAM sizes and SD24_B channel count (2 vs. 3). This allows direct PCB reuse across meter performance tiers, simplifying qualification and reducing time-to-market for designs based on the MSP430F6720AIPZ.