Texas Instruments MSP430F47126IPZ

Overview

MSP430F47126IPZ from Texas Instruments is an ultralow-power mixed-signal microcontroller designed for polyphase electricity metering, featuring 56KB Flash, 4KB RAM, six 16-bit sigma-delta ADCs with differential PGA inputs, integrated LCD driver for up to 160 segments, and four USCI modules supporting UART, IrDA, SPI, and I²C. It operates from 1.8 V to 3.6 V and supports real-time clock functionality via its Basic Timer.

For engineers reviewing the MSP430F47126IPZ datasheet, MSP430F47126IPZ pinout, MSP430F47126IPZ application, or MSP430F47126IPZ equivalent, key selection criteria include sigma-delta ADC channel count (6), LCD segment drive capability (160), QFP-100 package compatibility, and metering-specific peripherals including SD16_A converters with programmable gain and hardware multiplier support.

Technical Context

The MSP430F47126IPZ implements a 16-bit RISC CPU with 62.5-ns instruction cycle time and three-channel DMA, enabling efficient data movement between its six SD16_A sigma-delta ADCs and memory without CPU intervention. Its FLL+ system clock generator supports fast wake-up (<6 µs) from LPM4, critical for periodic metering sampling.

It integrates dual 16-bit timers (Timer_A3 and Timer_B3), on-chip comparator, supply voltage supervisor with programmable level detection, and Brownout Detector - all optimized for high-accuracy, low-drift energy measurement in utility-grade meters operating across –40°C to +85°C.

Key Specifications

Pinout & Package

Package: 100-pin plastic quad flatpack (QFP), PZ package, surface-mount, 0.5 mm pitch, 14 mm × 14 mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F47166IPZ and MSP430F47176IPZ, the MSP430F47126IPZ provides optimal balance of metrology performance and cost for Class 0.5S single-firmware meters, trading Flash/RAM headroom for lower unit cost without sacrificing ADC count, LCD drive, or communication flexibility.

Availability

MSP430F47126IPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and anti-tampering meter modules requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430F47126IPZ 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 decades of expertise in precision metrology and low-power design.

The MSP430F471xx product line was engineered specifically for electricity metering applications, integrating sigma-delta ADCs, LCD drivers, and metrology-optimized peripherals to replace discrete metrology ASICs and reduce system BOM cost.

FAQ

What is the maximum number of LCD segments supported by the MSP430F47126IPZ?

The MSP430F47126IPZ integrates the LCD_A controller capable of driving up to 160 segments with four commons (COM0–COM3). This supports large-format alphanumeric displays common in Class 0.5S and Class 0.2S electricity meters, eliminating the need for external segment drivers and reducing total system power consumption.

Does the MSP430F47126IPZ support hardware-accelerated energy calculations?

Yes, the MSP430F47126IPZ includes a 32×32 hardware multiplier supporting MPY, MPYS, MAC, and MACS instructions. This enables cycle-efficient computation of real/reactive/apparent power, RMS values, and fundamental frequency components directly in firmware - critical for meeting IEC 62053 accuracy requirements without external DSP.

How many sigma-delta ADC channels does the MSP430F47126IPZ have, and are they independent?

The MSP430F47126IPZ features six independent 16-bit sigma-delta ADC channels (SD16_A), each with differential PGA inputs, programmable gain (1× to 32×), and internal reference. All six channels can operate concurrently with synchronized sampling, enabling full 3-phase + neutral + auxiliary metrology in a single device.

What low-power modes are available on the MSP430F47126IPZ, and what is the fastest wake-up time?

The MSP430F47126IPZ offers five software-selectable low-power modes (LPM0–LPM4). Wake-up from LPM4 to active mode takes less than 6 µs using the FLL+ oscillator, allowing precise, low-duty-cycle sampling for battery-backed meters while maintaining calendar time via the Basic Timer's real-time clock function.

Is the MSP430F47126IPZ pin-compatible with other members of the MSP430F471xx family?

Yes, the MSP430F47126IPZ shares identical 100-pin QFP (PZ) packaging and pinout with MSP430F471x6 variants (e.g., MSP430F47166IPZ, MSP430F47176IPZ). This allows direct PCB reuse across different Flash/RAM configurations, simplifying design scalability and inventory management for meter manufacturers.