Texas Instruments MSP430F47126IPZR

Overview

MSP430F47126IPZR from Texas Instruments is an ultralow-power mixed-signal microcontroller designed for precision electricity metering applications. It integrates six 16-bit sigma-delta ADCs with differential PGA inputs, 56KB Flash/4KB RAM, a 16-bit RISC CPU, integrated LCD driver (160 segments), and four USCI modules supporting UART, IrDA, SPI, and I²C - enabling direct connection to metrology sensors and display interfaces in single-phase energy meters.

For engineers reviewing the MSP430F47126IPZR datasheet, MSP430F47126IPZR pinout, MSP430F47126IPZR application, or MSP430F47126IPZR equivalent, key selection criteria include its six-channel sigma-delta ADC architecture, 100-pin QFP package with dedicated analog input pairs (A0.0± to A5.0±), real-time clock capability, and support for ESD-robust metering environments requiring <0.2 µA off-mode current and <6 µs wake-up time.

Technical Context

The MSP430F47126IPZR implements a 16-bit RISC CPU with constant generators and 16 general-purpose registers, achieving 62.5-ns instruction cycle time at 16 MHz. Its FLL+ system enables fast wake-up from LPM4 (<6 µs) using either internal DCO or external XT1/XT2 crystals.

It features three-channel DMA, dual 16-bit timers (Timer_A3 and Timer_B3), on-chip comparator, hardware multiplier (32×32), brownout detector, and programmable SVS/SVM with level detection - all optimized for deterministic, low-jitter sampling and metrology computation in battery-backed or line-powered meters.

Key Specifications

Pinout & Package

Package: 100-pin plastic quad flatpack (QFP), PZ package, surface-mount, RoHS-compliant. Thermal pad not present; standard JEDEC MS-026 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal microcontroller applications.

Compared with MSP430F47126IPZR, MSP430F47166IPZR offers 36KB more Flash for protocol stacks and security libraries, while MSP430F47176IPZR adds 4KB RAM for waveform buffering - both retain identical ADC performance, pinout, and low-power behavior, making them drop-in upgrades for scalability-critical designs.

Availability

MSP430F47126IPZR is available at Aetrix Electronics and suitable for single-phase electricity meters, revenue-grade energy monitors, smart grid endpoint nodes, and tamper-resistant meter interfaces requiring stable component supply across multi-year production cycles.

Supply support for MSP430F47126IPZR 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, embedded processing, and digital signal technologies with over 50 years of innovation in precision measurement and low-power systems.

The MSP430F471xx product line was engineered specifically for electricity metering, integrating metrology-grade ADCs, LCD drivers, and ultra-low-power operation to replace discrete metrology ASIC + MCU combinations in Class 0.2 and Class 0.5 meters.

FAQ

What is the maximum number of analog input channels supported by the MSP430F47126IPZR?

The MSP430F47126IPZR supports six independent 16-bit sigma-delta analog-to-digital converters (SD16_A), each with differential PGA inputs. These correspond to six analog input channel pairs: A0.0±, A1.0±, A2.0±, A3.0±, A4.0±, and A5.0± - enabling simultaneous sampling of voltage, current, and auxiliary signals in single-phase metering applications. Unused pairs must be shorted and tied to AVSS per TI design guidelines.

Does the MSP430F47126IPZR include an integrated real-time clock (RTC)?

Yes, the MSP430F47126IPZR implements RTC functionality within its Basic Timer module, supporting calendar mode with year/month/day/hour/minute/second registers. It operates from ACLK (typically sourced from a 32.768 kHz watch crystal) and retains timekeeping during LPM3/LPM4 low-power modes. This eliminates the need for an external RTC IC in electricity meter designs requiring time-of-use billing or load profiling.

What LCD configuration does the MSP430F47126IPZR support?

The MSP430F47126IPZR integrates an LCD_A controller supporting up to 160 segments with 1:4 multiplexing. It provides four common outputs (COM0–COM3) and 64 dedicated segment outputs (plus additional GPIO/LCD-capable pins), enabling direct drive of alphanumeric and symbol-based displays in energy meters. Contrast is adjustable via internal resistor ladder or external capacitor (LCDCAP/R33 pin), removing need for external bias generators.

Can the MSP430F47126IPZR operate from a 3.3 V supply while maintaining metrology accuracy?

Yes, the MSP430F47126IPZR operates across 1.8 V to 3.6 V, and its six sigma-delta ADCs maintain specified 16-bit ENOB and linearity performance at 3.3 V. The AVCC and DVCC supplies are independently regulated, and internal reference (VREF) stability is preserved across this range. For Class 0.2 meter compliance, TI recommends using external precision references (e.g., REF5025) with A3.0±–A5.0± inputs when highest accuracy is required.

How many USCI modules does the MSP430F47126IPZR integrate, and what protocols do they support?

The MSP430F47126IPZR integrates four Universal Serial Communication Interface (USCI) modules: USCI_A0 and USCI_A1 support enhanced UART (with auto-baudrate detection), IrDA encoding/decoding, and synchronous SPI; USCI_B0 and USCI_B1 support I²C and synchronous SPI. This enables concurrent communication with optical ports (UART), PLC modems (SPI), sensor hubs (I²C), and HAN gateways - all without external protocol translators.