Texas Instruments TMS320F28066PFPQ

Overview

TMS320F28066PFPQ from Texas Instruments is a 90-MHz C28x-core real-time microcontroller with integrated FPU, CLA, and 12-bit 3.46-MSPS ADC, designed for closed-loop motor control and digital power conversion in automotive-grade (AEC Q100) applications. It delivers 16 ePWM channels (8 HRPWM-capable), 3 eCAP modules, 4 HRCAP modules, dual-sample-and-hold ADC, and on-chip temperature sensor - all in an 80-pin HTQFP PowerPAD package.

For engineers reviewing the TMS320F28066PFPQ datasheet, TMS320F28066PFPQ pinout, TMS320F28066PFPQ application, or TMS320F28066PFPQ equivalent, key selection criteria include AEC Q100 qualification, single 3.3-V supply operation, 54 GPIOs with input filtering, 6-channel DMA, and USB 2.0 device/host support - critical for EV charging, servo drives, and solar inverters requiring functional safety and high-resolution timing.

Technical Context

The TMS320F28066PFPQ implements a Harvard-architecture C28x CPU with atomic instructions and unified memory model, paired with a dedicated 32-bit floating-point CLA that executes control law code independently of the main CPU. Its VCU extends instruction set for complex math, CRC, and Viterbi operations - enabling deterministic execution of field-oriented control (FOC) algorithms.

Peripheral integration includes dual-sample-and-hold ADC with ratio-metric VREFHI/VREFLO references, analog comparators routed directly to ePWM trip zones, and dual-edge HRPWM modulation for frequency-modulated switching. The device uses internal voltage regulation for single-rail 3.3-V operation and supports IEEE 1149.1 JTAG boundary scan for production test.

Key Specifications

Pinout & Package

80-pin HTQFP PowerPAD (PFP) package with exposed thermal pad soldered to PCB ground plane; requires thermal vias for effective heat dissipation per TI PowerPAD guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28066PFPQ, TMS320F28066PZPQ offers greater I/O scalability but requires PCB redesign, while TMS320F28069PFPQ trades CLA acceleration for larger flash and VCU - making it preferable for memory-bound or CRC-heavy applications rather than ultra-low-latency control loops.

Availability

TMS320F28066PFPQ is available at Aetrix Electronics and suitable for EV charging station power modules, servo drive control modules, and solar string inverters requiring stable component supply, AEC Q100 compliance, and long-term industrial lifecycle support.

Supply support for TMS320F28066PFPQ 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 decades of expertise in real-time control silicon for industrial and automotive markets.

The TMS320F28066PFPQ belongs to TI's C2000™ Premium performance MCU family, engineered specifically for high-precision, low-latency closed-loop control in motor drives, digital power, and renewable energy systems.

FAQ

What is the maximum operating frequency and instruction cycle time of the TMS320F28066PFPQ?

The TMS320F28066PFPQ operates at a maximum CPU frequency of 90 MHz, delivering an instruction cycle time of 11.11 ns. This timing is confirmed in the device comparison table and supported by the on-chip PLL and two internal zero-pin oscillators, enabling deterministic real-time execution for motor control loops with sub-microsecond latency requirements.

Does the TMS320F28066PFPQ include a floating-point unit and programmable control law accelerator?

Yes, the TMS320F28066PFPQ integrates both a native single-precision floating-point unit (FPU) and a 32-bit floating-point programmable control law accelerator (CLA). The CLA executes control code independently of the main C28x CPU, allowing parallel processing of high-priority current loops while the CPU handles communication and diagnostics - a key differentiator for high-performance motor control.

What are the ADC specifications of the TMS320F28066PFPQ, and how many channels does it support?

The TMS320F28066PFPQ features a 12-bit analog-to-digital converter with a maximum sampling rate of 3.46 MSPS and dual sample-and-hold capability. It supports up to 16 input channels (ADCINA0–ADCINA7 and ADCINB0–ADCINB7), with ratio-metric VREFHI/VREFLO referencing for accurate ratiometric measurements in variable-voltage power stage environments.

Is the TMS320F28066PFPQ AEC Q100 qualified, and what temperature grade does it support?

Yes, the TMS320F28066PFPQ carries the "Q" suffix indicating AEC Q100 qualification for automotive applications. It is rated for operation from –40°C to +125°C, meeting Grade 1 requirements for under-hood and powertrain control environments where thermal robustness and long-term reliability are mandatory.

What communication interfaces are integrated into the TMS320F28066PFPQ?

The TMS320F28066PFPQ integrates two SCI/UART modules, two SPI modules, one I2C bus, one McBSP, one enhanced CAN (eCAN), and one USB 2.0 interface supporting full-speed device and host modes. These interfaces enable flexible connectivity for motor control networks, firmware updates, and diagnostic telemetry without external transceivers or bridge ICs.