Texas Instruments MSP430F2003TRSAR

Overview

MSP430F2003TRSAR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 1 KB + 256 B flash memory, 128 B RAM, and a 16-bit Sigma-Delta A/D converter with differential PGA inputs and internal reference. It integrates Timer_A with two capture/compare registers, Universal Serial Interface (USI) supporting SPI and I2C, and operates from 1.8 V to 3.6 V. It targets battery-powered sensor front ends requiring high-precision analog measurement and minimal power draw.

For engineers reviewing the MSP430F2003TRSAR datasheet, MSP430F2003TRSAR pinout, MSP430F2003TRSAR application, or MSP430F2003TRSAR equivalent, key selection criteria include its 16-bit SD16_A ADC resolution, Spy-Bi-Wire debug interface, TSSOP-14 package footprint, and support for five low-power modes with sub-1 µs wake-up - critical for energy-constrained embedded sensing systems.

Technical Context

The MSP430F2003TRSAR implements a 16-bit RISC CPU with constant generators and six operating modes (AM, LPM0–LPM4), enabling ultra-low active current (220 µA at 1 MHz, 2.2 V) and standby current (0.5 µA). Its basic clock module delivers ACLK, MCLK, and SMCLK using internal DCO (calibrated to ±1% at 1/8/12/16 MHz), 32-kHz crystal, or external digital source.

It features a dedicated SD16_A peripheral with differential input pairs (A0±, A1±, A2±, A3±), programmable gain amplifier, internal 1.2-V reference, and oversampling capability - all accessible via P1.x pins. USI supports full-duplex SPI and 7-bit addressable I2C, sharing pins with JTAG/Spy-Bi-Wire for compact system integration.

Key Specifications

Pinout & Package

Package: 14-pin Plastic Small-Outline Thin (TSSOP), RoHS-compliant, JEDEC MO-153 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F2003TRSAR, MSP430F2013TRSAR offers double flash capacity without altering ADC performance or power profile, while MSP430G2553IPW20 trades 16-bit sigma-delta precision for greater code density and legacy toolchain support - making the former ideal for memory-constrained precision sensing and the latter for feature-rich general-purpose monitoring.

Availability

MSP430F2003TRSAR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, and industrial 4–20 mA transmitters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MSP430F2003TRSAR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The MSP430F20xx series was designed specifically for ultra-low-power, battery-operated sensing applications - integrating precision analog peripherals, efficient 16-bit processing, and aggressive power gating to maximize operational lifetime in resource-constrained environments.

FAQ

What is the maximum operating frequency of the MSP430F2003TRSAR's DCO?

The MSP430F2003TRSAR's digitally controlled oscillator (DCO) is factory-calibrated to four frequencies: 1 MHz, 8 MHz, 12 MHz, and 16 MHz, all within ±1% accuracy. While the DCO can be tuned beyond these points, TI specifies 16 MHz as the maximum guaranteed operating frequency for reliable instruction execution and peripheral timing compliance in the MSP430F2003TRSAR.

Does the MSP430F2003TRSAR support hardware UART communication?

No, the MSP430F2003TRSAR does not include a dedicated hardware UART peripheral. It features a Universal Serial Interface (USI) module that supports SPI and I2C protocols natively. UART functionality must be implemented in software using Timer_A and GPIO pins - a common practice in ultra-low-power designs where asynchronous serial is infrequent and latency-tolerant.

What is the purpose of the VREF pin (P1.3) on the MSP430F2003TRSAR?

On the MSP430F2003TRSAR, P1.3 functions as VREF - serving as both an input for external reference voltage and an output for the internal 1.2-V reference. When configured as output, it supplies the SD16_A ADC's internal reference; when used as input, it enables ratiometric measurements against a stable external source, improving accuracy in varying supply conditions.

Can the MSP430F2003TRSAR operate from a 3.3-V supply without level-shifting external peripherals?

Yes, the MSP430F2003TRSAR operates across 1.8 V to 3.6 V, making 3.3-V direct interfacing fully supported. Its I/O pins are CMOS-compatible and tolerate input voltages up to VCC + 0.3 V, so standard 3.3-V logic peripherals (e.g., I2C sensors, SPI flash) may connect directly without level shifters - provided their output high level meets VIH ≥ 0.7×VCC.

How many analog input channels does the SD16_A ADC support on the MSP430F2003TRSAR?

The SD16_A ADC on the MSP430F2003TRSAR supports four differential input pairs (A0±, A1±, A2±, A3±), totaling eight physical analog input terminals mapped to P1.0 through P1.7. These are configurable as four true differential channels or eight single-ended inputs, with programmable gain and internal reference - enabling flexible sensor interface topologies without external multiplexers.