Texas Instruments MSP4301103IPWR

Overview

MSP4301103IPWR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring three independent 24-bit sigma-delta ADCs, a 16-bit Timer_A with three capture/compare registers, USART (UART/SPI), hardware multiplier, and 11 I/O pins. It operates from 1.8 V to 3.6 V, draws 220 µA at 1 MHz/2.2 V in active mode, and supports single-phase electricity metering and digital power monitoring applications.

For engineers reviewing the MSP4301103IPWR datasheet, MSP4301103IPWR pinout, MSP4301103IPWR application, or MSP4301103IPWR equivalent, key selection criteria include its 24-pin TSSOP package, integrated SD24_A ADC architecture with differential PGA inputs, low-power LPM4 current of 0.1 µA, and compatibility with high-frequency crystal up to 16 MHz for metrology-grade timing accuracy.

Technical Context

The MSP4301103IPWR implements a 16-bit RISC CPU with constant generators and digitally controlled oscillator (DCO), enabling sub-1 µs wake-up from standby mode. Its clock system supports internal DCO (up to 12 MHz), VLO (12 kHz), HF crystal (up to 16 MHz), and external digital clock sources.

It integrates three independent SD24_A sigma-delta ADC modules-each with differential PGA inputs, programmable gain, and built-in voltage reference-targeted specifically for high-precision analog sensing in energy measurement systems. All ADCs share common AVCC/AVSS rails and support synchronous bit-stream output via dedicated SDxDO pins.

Key Specifications

Pinout & Package

The MSP4301103IPWR is housed in a 24-pin TSSOP (PW) package measuring 7.8 mm × 4.4 mm, with exposed thermal pad not electrically connected. Pin functions are validated per TI SLAS701B Rev JUNE 2018.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP4301103IPWR, MSP430AFE253IPW offers greater firmware headroom for evolving standards compliance, while MSP430AFE223IPW provides identical memory and ADC resources at potentially lower unit cost - both maintain pin-to-pin compatibility and identical SD24_A timing behavior.

Availability

MSP4301103IPWR is available at Aetrix Electronics and suitable for single-phase electricity meters, digital power monitors, and sensor signal conditioning systems requiring stable component supply across multi-year production cycles.

Supply support for MSP4301103IPWR 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 specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in precision electronics.

The MSP430AFE2xx product line is designed specifically for high-accuracy energy measurement applications, integrating metrology-grade sigma-delta ADCs, low-drift references, and ultra-low-power operation to meet IEC 62053 and ANSI C12 standards.

FAQ

What is the maximum crystal frequency supported by the MSP4301103IPWR?

The MSP4301103IPWR supports high-frequency crystals up to 16 MHz on the XT2 oscillator pins (P2.6/XT2IN and P2.7/XT2OUT). When using crystals above 12 MHz to source the CPU clock, the MCLK divider must be configured to ensure the core runs below 12 MHz - preserving timing compliance and ADC sampling stability. This capability enables precise timebase generation for IEC 62053-compliant metering firmware.

Does the MSP4301103IPWR include an internal voltage reference for the SD24_A ADCs?

Yes, the MSP4301103IPWR includes an internal 1.2 V bandgap voltage reference accessible via the VREF pin. This reference can be used directly by the SD24_A ADC modules or buffered for external use. It supports temperature compensation and maintains ±1% initial accuracy over the –40°C to 85°C range - critical for maintaining Class 0.5 energy measurement accuracy without external reference components.

How many independent analog input channels does the MSP4301103IPWR support?

The MSP4301103IPWR supports three independent 24-bit sigma-delta ADC channels (SD24_A), each with dedicated differential analog input pairs: A0.0±, A1.0±, and A2.0±. These channels operate concurrently with separate conversion control and bit-stream outputs (SD0DO, SD1DO, SD2DO), enabling true simultaneous sampling of up to six analog signals - essential for phase-aligned power calculations in single-phase meters.

What low-power modes are available on the MSP4301103IPWR and what is the lowest current draw?

The MSP4301103IPWR offers five low-power modes (LPM0–LPM4). In LPM4 - the deepest sleep state with RAM retention and all clocks disabled - it draws just 0.1 µA at 2.2 V and 25°C. This enables multi-year battery operation in portable or tamper-resistant metering endpoints. Wake-up occurs in under 1 µs via external interrupt or timer event, ensuring responsive event handling without sacrificing energy efficiency.

Is the MSP4301103IPWR pin-compatible with other devices in the MSP430AFE2xx family?

Yes, the MSP4301103IPWR is pin-compatible with all 24-pin TSSOP variants in the MSP430AFE2xx family, including MSP430AFE253IPW, MSP430AFE223IPW, and MSP430AFE233IPW. All share identical pin numbering, electrical characteristics, and peripheral mapping - allowing hardware reuse across different memory/ADC configurations. This simplifies design scalability and reduces qualification effort when upgrading firmware or adding features.