Texas Instruments MSP430I2041TRHBT

Overview

MSP430I2041TRHBT from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller optimized for precision energy metering and battery-powered sensing. It integrates four 24-bit sigma-delta ADCs with differential PGA inputs, operates from 2.2 V to 3.6 V, delivers 16.384-MHz system clock via internal DCO, and achieves 75 nA shutdown current-enabling multi-year operation in smart power strips and submeters.

For engineers reviewing the MSP430I2041TRHBT datasheet, MSP430I2041TRHBT pinout, MSP430I2041TRHBT application, or MSP430I2041TRHBT equivalent, key selection criteria include its 32-pin VQFN (RHB) package, four independent SD24 ADC channels with programmable gain, eUSCI_A0 UART/IrDA/SPI and eUSCI_B0 SPI/I²C dual serial interfaces, and support for rapid wake-up (1 µs) from LPM3 standby mode.

Technical Context

The MSP430I2041TRHBT implements a 16-bit RISC CPU with constant generators and hardware multiplier for efficient signal processing in metrology applications. Its analog subsystem centers on four independent SD24 modules-each supporting differential input, PGA gain up to 32×, and oversampling ratios up to 256-enabling simultaneous high-resolution measurement of voltage, current, and auxiliary sensor signals.

Digital peripherals include two 16-bit Timer_A modules (TA0 and TA1), each with three capture/compare registers for PWM generation and time-critical event handling, plus an integrated LDO delivering regulated 1.8-V core supply. Clock management supports internal DCO (16.384 MHz), external resistor tuning, and bypass mode for external crystal or oscillator input.

Key Specifications

Pinout & Package

Package: 32-pin VQFN (RHB), 5 mm × 5 mm, with exposed thermal pad recommended to be connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430I2040TRHBT and MSP430I2031TRHBT, the MSP430I2041TRHBT provides maximum flexibility for complex metrology firmware, full channel redundancy, and future-proofing-making it optimal for premium smart meters and multi-sensor industrial nodes requiring all four SD24 channels.

Availability

MSP430I2041TRHBT is available at Aetrix Electronics and suitable for smart power strips, residential submeters, and industrial sensor nodes requiring stable component supply, long-lifecycle assurance, and TI-authorized traceability.

Supply support for MSP430I2041TRHBT 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 connectivity technologies with over 50 years of innovation in low-power design.

The MSP430™ Metrology and Monitoring product line targets high-precision, battery-operated measurement applications-including energy metering, sensor fusion, and portable medical devices-by integrating ultra-low-power analog and digital subsystems on a single chip.

FAQ

What is the maximum ADC sampling rate supported by the MSP430I2041TRHBT?

The MSP430I2041TRHBT supports up to 256× oversampling per SD24 channel. With a base conversion time of ~100 µs and programmable OSR settings, effective sampling rates range from 125 SPS (OSR=256) to 10 kSPS (OSR=1) per channel. All four ADCs operate independently, enabling concurrent sampling across multiple analog inputs without multiplexer delay-critical for synchronized voltage/current acquisition in energy metering firmware.

Does the MSP430I2041TRHBT support external crystal oscillators?

Yes, the MSP430I2041TRHBT supports external clock sources via the CLKIN function on P2.0. When configured in bypass mode, the device accepts an external 32.768-kHz crystal or CMOS clock signal for ACLK generation-enabling precise timekeeping for energy accumulation and tariff switching. The internal DCO remains available for MCLK/SMCLK, allowing hybrid clock architectures that balance accuracy and power efficiency.

How is the thermal pad on the MSP430I2041TRHBT's RHB package handled in PCB layout?

The exposed thermal pad on the MSP430I2041TRHBT's 32-pin VQFN (RHB) package must be soldered to a solid copper plane connected to DVSS. TI recommends using at least four thermal vias (0.3-mm diameter) under the pad, filled or capped, to ensure low-thermal-resistance conduction to inner-layer ground planes. Failure to connect the thermal pad degrades thermal performance and may cause junction temperature exceedance during sustained ADC or CPU activity.

Can the MSP430I2041TRHBT perform real-time harmonic analysis?

Yes, the MSP430I2041TRHBT can execute real-time harmonic analysis using its hardware multiplier and 16-bit timers. With four synchronized SD24 ADCs sampling at ≥1 kSPS, the onboard DSP-capable CPU processes FFTs up to 39th harmonic (per IEC 61000-4-7) using TI's MSP430 Digital Signal Processing Library. Firmware execution time is optimized by leveraging constant generators and 16-bit register arithmetic-enabling full harmonic spectrum calculation within 100 ms per cycle on standard 16.384-MHz operation.

What development tools are officially supported for the MSP430I2041TRHBT?

TI officially supports the MSP430I2041TRHBT with the EVM430-I2040S evaluation module for metering, the MSP-TS430RHB32A 100-pin target board, and MSP430Ware™ code examples. Development is enabled through Code Composer Studio™ IDE (desktop/cloud), Energy Measurement Design Center framework, and TI Resource Explorer. Debugging uses Spy-Bi-Wire via RST/NMI/SBWTDIO-no external emulator required for basic programming and real-time variable inspection.