Texas Instruments TMS320F28031RSHT

Overview

TMS320F28031RSHT from Texas Instruments is a 60-MHz C28x-core real-time microcontroller with integrated control peripherals, designed for digital power and motor control systems. It features 32 KB on-chip Flash, 10 KB SARAM, 12-bit ADC (4.6 MSPS), 14 ePWM channels, and 32-bit CPU timers. Its VQFN-56 package supports compact inverter gate drivers and DC/DC converter control modules.

For engineers reviewing the TMS320F28031RSHT datasheet, TMS320F28031RSHT pinout, TMS320F28031RSHT application, or TMS320F28031RSHT equivalent, key selection criteria include ePWM channel count, HRPWM capability, ADC resolution and sampling rate, CLA absence, and RSH-package thermal performance in high-density power designs.

Technical Context

The TMS320F28031RSHT implements a Harvard-architecture C28x CPU executing at 60 MHz (16.67 ns cycle time) with unified memory model and atomic operations. It lacks the Control Law Accelerator (CLA) present in F28033/F28035 variants but includes full peripheral interrupt expansion (PIE), three 32-bit CPU timers, and dual-edge HRPWM on 7 channels.

Its analog subsystem integrates a 12-bit, 4.6-MSPS ADC with 16 input channels, dual sample-and-hold, internal temperature sensor, and three comparators with DACs. All GPIO pins are multiplexed with peripheral functions including eCAP, eQEP, SPI, I2C, LIN, eCAN, and SCI - with JTAG boundary scan support per IEEE 1149.1.

Key Specifications

Pinout & Package

The TMS320F28031RSHT uses a 56-pin Very Thin Quad Flatpack No-Lead (VQFN) package with exposed thermal pad (RSH). Pin pitch is 0.4 mm; body size is 7.0 mm × 7.0 mm. Thermal resistance θ_JA = 42.5°C/W (JEDEC standard board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar real-time control applications.

Compared with TMS320F28032RSHT, the TMS320F28031RSHT offers two additional ePWM channels and one more ADC input - enabling direct control of auxiliary converters or redundant sensing paths. Versus TMS320F28034RSHT, it omits the CLA but retains identical analog/peripheral specs at lower cost and code footprint.

Availability

TMS320F28031RSHT is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and EV on-board chargers requiring stable component supply across multi-year production cycles.

Supply support for TMS320F28031RSHT 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 industrial and automotive electronics.

The TMS320F2803x family delivers entry-performance real-time control MCUs optimized for cost-sensitive digital power and motor control applications - balancing peripheral richness, analog integration, and code compatibility with legacy C28x designs.

FAQ

What is the maximum ADC sampling rate supported by the TMS320F28031RSHT?

The TMS320F28031RSHT supports a maximum ADC conversion rate of 4.6 million samples per second (MSPS), with a minimum conversion time of 216.67 ns. This performance is achieved using its dual sample-and-hold architecture and is specified under recommended operating conditions (3.3 V supply, –40°C to 105°C). The TMS320F28031RSHT ADC provides 12-bit resolution across 16 input channels, making it suitable for high-fidelity current/voltage sensing in fast-switching power converters.

Does the TMS320F28031RSHT include a Control Law Accelerator (CLA)?

No, the TMS320F28031RSHT does not include a Control Law Accelerator (CLA). According to the official device comparison table, CLA functionality is only present in the TMS320F28033 and TMS320F28035 variants of the F2803x family. The TMS320F28031RSHT relies solely on its 60-MHz C28x CPU for control law execution, which remains fully capable for standard FOC, PFC, and DC/DC control tasks where CLA offload is not required.

What package type and pin count does the TMS320F28031RSHT use?

The TMS320F28031RSHT uses a 56-pin Very Thin Quad Flatpack No-Lead (VQFN) package, designated as RSH. Its body dimensions are 7.0 mm × 7.0 mm with 0.4 mm pin pitch and an exposed thermal pad. This package is optimized for high thermal performance in space-constrained power electronics applications such as gate driver boards and compact DC/DC modules where the TMS320F28031RSHT serves as the primary digital controller.

Can the TMS320F28031RSHT operate from a single 3.3-V supply?

Yes, the TMS320F28031RSHT operates from a single 3.3-V supply. It integrates an internal voltage regulator that generates the required 1.8-V core voltage, eliminating external power sequencing requirements. The device specifies VDD, VDDIO, and VDDA all at 3.3 V nominal, with no need for separate 1.8-V or 5-V rails. This simplifies power design and reduces bill-of-materials cost in applications like industrial inverters and EV charging modules where the TMS320F28031RSHT is deployed.

What communication interfaces are available on the TMS320F28031RSHT?

The TMS320F28031RSHT includes one SCI (UART-compatible), two SPI modules, one I2C module, one LIN module, and one enhanced CAN (eCAN) module. These interfaces are implemented via multiplexed GPIO pins and support concurrent operation. The eCAN and LIN modules are particularly valuable for automotive and industrial networking, while SPI and I2C enable communication with external ADCs, EEPROMs, or isolated gate drivers - all essential in systems where the TMS320F28031RSHT acts as the central real-time controller.