Texas Instruments MSP430I2040TRHBR

Overview

MSP430I2040TRHBR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller designed for precision energy metering and analog sensor systems. It integrates four 24-bit sigma-delta ADCs with differential PGA inputs, operates across 2.2 V–3.6 V, delivers 275 µA/MHz active current at 16.384 MHz, and supports wake-up from LPM3 in 1 µs - enabling high-accuracy, battery-operated power monitoring in smart plugs and submeters.

For engineers reviewing the MSP430I2040TRHBR datasheet, MSP430I2040TRHBR pinout, MSP430I2040TRHBR application, or MSP430I2040TRHBR equivalent, key selection criteria include its 32-pin VQFN (RHB) package, four-channel 24-bit SD24 ADC architecture, integrated eUSCI_A0/eUSCI_B0 peripherals (UART/IrDA/SPI/I²C), and support for metrology-grade signal acquisition with internal reference and temperature sensing.

Technical Context

The MSP430I2040TRHBR implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO) tunable to 16.384 MHz, enabling sub-5 µs wake-up from low-power modes. Its analog subsystem centers on four independent SD24 modules, each supporting differential PGA inputs, programmable gain, and oversampling ratios up to 256 - optimized for DC/AC current and voltage measurement in single-phase metering.

Digital peripherals include two 16-bit Timer_A modules (each with three capture/compare registers), a hardware multiplier for 16×16 operations, and dual eUSCI modules: eUSCI_A0 supports enhanced UART with auto-baud detection and IrDA, while eUSCI_B0 handles synchronous SPI and I²C - all coordinated via an integrated LDO delivering 1.8-V core supply and programmable voltage monitoring.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430I2041TRHBR, the MSP430I2040TRHBR trades flash/RAM capacity for lower unit cost without sacrificing metrology precision or interface flexibility; versus MSP430I2030TRHBR, it adds a fourth SD24 channel essential for neutral-current detection in Class 0.5 revenue meters.

Availability

MSP430I2040TRHBR is available at Aetrix Electronics and suitable for smart plug energy monitoring, single-phase electronic metering, and industrial power quality sensors requiring stable component supply and long-lifecycle support.

Supply support for MSP430I2040TRHBR 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 focused on analog, embedded processing, and connectivity technologies, serving industrial, automotive, and consumer markets with high-reliability silicon and system-level expertise.

The MSP430I2040TRHBR belongs to TI's MSP430™ Metrology and Monitoring portfolio - engineered specifically for ultra-low-power, high-accuracy energy measurement in battery-operated and mains-powered metering applications.

FAQ

What is the maximum sampling rate supported by the SD24 ADCs in MSP430I2040TRHBR?

The MSP430I2040TRHBR SD24 modules support configurable data rates up to 16 kS/s per channel when using OSR = 256 and internal reference. Actual achievable rate depends on oversampling ratio and PGA configuration - for example, 4 kS/s at OSR = 1024 for enhanced noise rejection in precision metering. The MSP430I2040TRHBR datasheet specifies timing limits in Section 8.7.7.

Does MSP430I2040TRHBR support hardware-based cryptographic functions?

No, the MSP430I2040TRHBR does not include dedicated cryptographic accelerators or hardware AES/SHA engines. Security relies on software-implemented algorithms; for certified secure boot or data encryption, external secure elements or higher-tier MSP430FRxx FRAM MCUs with TLS stack support are recommended. The MSP430I2040TRHBR focuses on analog accuracy and low-power metrology, not cryptographic processing.

Can MSP430I2040TRHBR operate from a 1.8-V supply?

No, the MSP430I2040TRHBR requires a minimum supply voltage of 2.2 V per its absolute maximum ratings and recommended operating conditions. Operation below 2.2 V may cause unstable ADC performance, SRAM retention loss, or reset assertion. The integrated LDO regulates core voltage to 1.8 V internally, but VCC must remain ≥2.2 V. For true 1.8-V operation, consider MSP430FR2355 or MSP430FR5994 variants.

Is the thermal pad on the RHB package of MSP430I2040TRHBR electrically connected?

Yes, the exposed thermal pad on the MSP430I2040TRHBR RHB package is internally connected to DVSS (digital ground). TI explicitly recommends soldering the pad to a DVSS copper plane for optimal thermal dissipation and analog noise reduction. Failure to connect the pad may degrade SD24 performance and increase junction temperature beyond safe limits under continuous 16-MHz operation.

How many I²C buses does MSP430I2040TRHBR support?

The MSP430I2040TRHBR supports one I²C interface via eUSCI_B0, which can operate in master or slave mode with standard (100 kHz) and fast (400 kHz) modes. It does not include a second hardware I²C peripheral; additional I²C buses require bit-banged GPIO implementations or external I²C multiplexers. This single I²C channel is sufficient for connecting calibration EEPROMs, temperature sensors, or display controllers in typical metering designs.