Texas Instruments TMS320F28066UPFPS

Overview

TMS320F28066UPFPS from Texas Instruments is a 90-MHz C28x-based real-time microcontroller with integrated FPU, CLA, and advanced motor control peripherals including 14 ePWM channels (7 HRPWM-capable), 3 eCAP modules, 4 HRCAP modules, dual-sample-and-hold 12-bit ADC (3.46 MSPS, 12 channels), and eCAN interface - deployed in solar inverters, EV charging power modules, and servo drive control.

For engineers reviewing the TMS320F28066UPFPS datasheet, TMS320F28066UPFPS pinout, TMS320F28066UPFPS application, or TMS320F28066UPFPS equivalent, key selection criteria include HRPWM resolution for digital power timing, CLA offloading capability for real-time current loop execution, ADC sampling rate vs. channel count trade-offs, and USB absence versus eCAN/SCI/SPI/I²C peripheral availability in the 80-pin PFP package.

Technical Context

The TMS320F28066UPFPS implements a Harvard-architecture C28x CPU core with atomic instruction support and unified memory mapping, 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 CRC, complex math, and Viterbi operations.

Peripheral integration includes dual 16-bit ePWM timers per module with high-resolution edge control, three independent eCAP inputs for precise event capture, and a 12-bit ADC with dual S/H supporting simultaneous sampling across up to 12 analog inputs at 3.46 MSPS - all accessible via 6-channel DMA to minimize CPU overhead in closed-loop motor control.

Key Specifications

Pinout & Package

Package: 80-pin HTQFP (PFP) PowerPAD™ thermally enhanced thin quad flatpack (12.0 mm × 12.0 mm); exposed thermal pad requires PCB ground plane connection via thermal vias for effective heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28069PFP and TMS320F280049CPN, the TMS320F28066UPFPS offers optimal balance of CLA-accelerated control, 14-channel PWM, and eCAN for cost-sensitive industrial motor drives - trading flash capacity and USB for deterministic real-time execution and automotive-grade communication.

Availability

TMS320F28066UPFPS is available at Aetrix Electronics and suitable for solar inverter control, EV charging power modules, and servo drive control requiring stable component supply across extended industrial temperature ranges.

Supply support for TMS320F28066UPFPS 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 delivering analog and embedded processing solutions for industrial, automotive, and consumer applications.

The TMS320F28066UPFPS belongs to TI's C2000™ real-time MCU product line, designed specifically for closed-loop control in digital power, motor drives, and energy conversion systems where deterministic timing and analog integration are critical.

FAQ

What is the maximum operating frequency of the TMS320F28066UPFPS?

The TMS320F28066UPFPS operates at a maximum CPU frequency of 90 MHz, corresponding to an 11.11-ns instruction cycle time. This speed is achieved using the internal PLL with either the on-chip oscillators or an external crystal (X1/X2). The device maintains full peripheral functionality-including ADC sampling, ePWM generation, and CLA execution-at this rated frequency under specified voltage and temperature conditions.

Does the TMS320F28066UPFPS include a floating-point unit (FPU)?

Yes, the TMS320F28066UPFPS integrates a native single-precision floating-point unit (FPU) alongside the C28x CPU core. This enables efficient execution of floating-point arithmetic in C/C++ without software emulation, significantly accelerating mathematical operations used in motor control algorithms such as Park/Clarke transforms and PID tuning - a key differentiator from earlier fixed-point-only C2000 devices.

How many ePWM channels does the TMS320F28066UPFPS support, and are they HRPWM-capable?

The TMS320F28066UPFPS supports 14 ePWM output channels across 7 modules, with 7 of those channels designated as high-resolution PWM (HRPWM)-capable. Each HRPWM channel provides 150-ps resolution fine adjustment for dead-time control and phase alignment - essential for minimizing distortion in SiC/GaN-based high-frequency inverters and precision servo amplifiers.

Is USB functionality available on the TMS320F28066UPFPS?

No, USB functionality is not implemented on the TMS320F28066UPFPS. While the pin locations USB0DP and USB0DM exist on the 80-pin PFP package, they are unconnected internally. USB is only available on TMS320F2806xU variants (e.g., TMS320F28069UPFP). For host connectivity, designers must use SCI/UART, SPI, or eCAN interfaces supported by the TMS320F28066UPFPS.

What is the ADC configuration of the TMS320F28066UPFPS?

The TMS320F28066UPFPS features a 12-bit analog-to-digital converter with dual sample-and-hold (S/H) architecture, capable of 3.46 MSPS aggregate throughput and 289-ns conversion time. It supports up to 12 analog input channels (ADCINA0–ADCINA5 and ADCINB0–ADCINB5), with flexible multiplexing and SOC-based triggering - optimized for synchronized current/voltage sampling in 3-phase motor and inverter applications.