Texas Instruments TMS320F28031PNQ

Overview

TMS320F28031PNQ from Texas Instruments is a 60-MHz C28x-core real-time microcontroller with integrated analog peripherals, designed for closed-loop motor and power control in automotive-grade systems. It delivers 16.67-ns instruction cycle time, 32-bit floating-point CLA acceleration (not present in this variant), 12-bit 4.6-MSPS ADC with 16 channels, 14 ePWM channels, and AEC Q100 qualification (–40°C to 125°C) for EV charging modules and on-board chargers.

For engineers reviewing the TMS320F28031PNQ datasheet, TMS320F28031PNQ pinout, TMS320F28031PNQ application, or TMS320F28031PNQ equivalent, key selection criteria include its 80-pin LQFP package, 3.3-V single-supply operation, eCAN + LIN + dual SPI interfaces, HRPWM capability, and code compatibility with F2803x family for scalable motor control firmware deployment.

Technical Context

The TMS320F28031PNQ implements a Harvard-architecture C28x CPU with atomic operations and fast interrupt response, paired with a Peripheral Interrupt Expansion (PIE) block supporting all on-chip peripherals. Its memory subsystem includes 32KB flash, 10KB SARAM, 8KB boot ROM, and 1KB OTP - all secured via 128-bit key lock and code-security module.

Analog integration centers on a 12-bit, 4.6-MSPS ADC with dual sample-and-hold, internal temperature sensor, three comparators with DACs, and high-resolution PWM (HRPWM) with dual-edge modulation. Clocking uses internal zero-pin oscillators or external crystal/XCLKIN, with watchdog timer and missing-clock detection for functional safety compliance.

Key Specifications

Pinout & Package

Package: 80-pin Low-Profile Quad Flatpack (LQFP), PN suffix, 12.0 mm × 12.0 mm body size, exposed thermal pad (non-electrical).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28031PNQ, the TMS320F28035PNQ adds hardware-accelerated control law execution and expanded memory for complex algorithms, while the TMS320F28034PNQ extends timing precision with HRCAP without increasing computational overhead - both maintain pin-to-pin compatibility in the 80-pin LQFP package.

Availability

TMS320F28031PNQ is available at Aetrix Electronics and suitable for EV on-board chargers, DC fast charging power modules, and industrial servo drive power stages requiring stable component supply across automotive and industrial lifecycles.

Supply support for TMS320F28031PNQ 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The TMS320F2803x family belongs to TI's C2000™ real-time control MCU portfolio, engineered specifically for deterministic, low-latency closed-loop control in power electronics, motor drives, and renewable energy systems.

FAQ

What is the maximum operating frequency and instruction cycle time of the TMS320F28031PNQ?

The TMS320F28031PNQ operates at a maximum CPU frequency of 60 MHz, delivering a 16.67-ns instruction cycle time. This timing is guaranteed across the full –40°C to +125°C temperature range and 3.3-V supply, enabling deterministic execution of high-speed control loops in motor and power conversion applications. The TMS320F28031PNQ achieves this performance using the optimized TMS320C28x core architecture with Harvard bus and zero-wait-state memory access.

Does the TMS320F28031PNQ include a Control Law Accelerator (CLA)?

No, the TMS320F28031PNQ does not include a Control Law Accelerator (CLA). According to the official device comparison table, CLA is only present in the TMS320F28033 and TMS320F28035 variants of the F2803x family. The TMS320F28031PNQ relies solely on the C28x CPU for control law execution, making it suitable for applications where algorithmic complexity fits within the 60-MHz fixed-point processing budget.

What analog peripherals are integrated into the TMS320F28031PNQ?

The TMS320F28031PNQ integrates a 12-bit, 4.6-MSPS ADC with 16 input channels and dual sample-and-hold, three analog comparators with integrated DACs, an on-chip temperature sensor, and high-resolution PWM (HRPWM) modules. These peripherals enable direct current/voltage sensing, overcurrent protection, thermal monitoring, and precise timing control - eliminating the need for external signal conditioning in most motor and power stage designs.

Is the TMS320F28031PNQ pin-compatible with other F2803x devices in the 80-pin LQFP package?

Yes, the TMS320F28031PNQ is pin-compatible with all other F2803x variants offered in the 80-pin PN LQFP package, including TMS320F28030PNQ, TMS320F28032PNQ, TMS320F28033PNQ, TMS320F28034PNQ, and TMS320F28035PNQ. Pin assignments, power/ground locations, and peripheral signal mappings are identical - allowing hardware reuse across different performance tiers within the same family.

What communication interfaces does the TMS320F28031PNQ support?

The TMS320F28031PNQ supports one enhanced Controller Area Network (eCAN) module, one Local Interconnect Network (LIN) module, two Serial Peripheral Interface (SPI) modules, one Inter-Integrated Circuit (I²C) module, and one Serial Communications Interface (SCI) compatible with UART. All interfaces are hardware-implemented and accessible via dedicated or multiplexed GPIO pins, supporting robust communication in automotive and industrial networks without CPU overhead.