Texas Instruments TMS320F28068FPZT

Overview

TMS320F28068FPZT 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 industrial inverters and EV charging modules. It features 64KB flash, 34KB RAM, 8 ePWM channels (4 HRPWM-capable), 3 eCAP, 2 eQEP, USB 2.0, eCAN, and operates from a single 3.3-V supply.

For engineers reviewing the TMS320F28068FPZT datasheet, TMS320F28068FPZT pinout, TMS320F28068FPZT application, or TMS320F28068FPZT equivalent, key selection criteria include HRPWM dual-edge modulation capability, on-chip VCU for CRC/Viterbi acceleration, CLA-independent floating-point execution, and thermal performance in 100-pin HTQFP (PZP) packaging for high-density power stage control designs.

Technical Context

The TMS320F28068FPZT implements a Harvard-architecture C28x CPU with atomic instruction support and unified memory mapping, enabling deterministic real-time interrupt response under 11.11-ns cycle time. Its CLA executes floating-point math independently of the main CPU, while the VCU extends instruction set for complex multiply, CRC, and Viterbi operations-critical for sensorless 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 enhanced HRPWM modules supporting frequency modulation via dual-edge control. The device uses internal voltage regulation for single-rail 3.3-V operation and supports IEEE 1149.1 JTAG boundary scan.

Key Specifications

Pinout & Package

Package: 100-pin HTQFP (PZP) PowerPAD™ thermally enhanced thin quad flatpack, 14.0 mm × 14.0 mm body size. Exposed thermal pad must be soldered to PCB ground plane using thermal vias for effective heat dissipation; pad is not electrically connected to internal VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28068FPZT, TMS320F28069PZP offers greater memory headroom for complex control laws without changing PCB layout, while TMS320F280049CPZT provides next-gen analog integration and configurability at the cost of VCU functionality-making it suitable for precision sensing-focused upgrades rather than drop-in replacement.

Availability

TMS320F28068FPZT is available at Aetrix Electronics and suitable for industrial motor drives, solar power optimizers, and EV charging station power modules requiring stable component supply across extended production lifecycles.

Supply support for TMS320F28068FPZT 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 specializing in analog and embedded processing technologies, with leadership in real-time control, power management, and signal chain solutions.

The TMS320F2806x family belongs to TI's C2000™ real-time MCU portfolio, engineered specifically for high-precision closed-loop control in motor drives, digital power, and renewable energy systems-emphasizing deterministic timing, analog integration, and computational efficiency.

FAQ

What is the maximum ADC sampling rate supported by the TMS320F28068FPZT?

The TMS320F28068FPZT supports a maximum ADC sampling rate of 3.46 MSPS with 12-bit resolution and dual sample-and-hold architecture. This allows simultaneous sampling of up to two analog signals per conversion window, achieving a minimum conversion time of 289 ns-critical for high-bandwidth current sensing in SiC-based inverters. The ADC interface is optimized for low-latency DMA transfers to CLA or CPU memory buffers.

Does the TMS320F28068FPZT include hardware security features?

Yes, the TMS320F28068FPZT integrates a 128-bit password-protected Code Security Module (CSM) and 1KB one-time programmable (OTP) ROM. These features enable secure boot, flash/SARAM encryption, and firmware IP protection against unauthorized read-out or cloning. The CSM enforces access restrictions based on password validation, and OTP stores immutable keys or calibration data essential for certified motor control deployments.

Can the TMS320F28068FPZT operate from a single 3.3-V supply?

Yes, the TMS320F28068FPZT incorporates an internal voltage regulator that allows full operation from a single 3.3-V supply rail. It eliminates external power sequencing requirements and integrates power-on reset (POR) and brownout reset (BOR) circuitry. This simplifies board design for space-constrained applications such as compact OBC modules and integrated servo drives where supply rail count must be minimized.

What peripheral interfaces does the TMS320F28068FPZT support for industrial communication?

The TMS320F28068FPZT supports eCAN, two SCI/UART modules, two SPI modules, one I²C bus, one McBSP, and USB 2.0 (full-speed device/host). These interfaces enable robust connectivity to host controllers, isolated gate drivers, position sensors, BMS units, and diagnostic tools-meeting requirements for industrial automation, grid-tied inverters, and smart charging infrastructure without external protocol bridges.

Is the TMS320F28068FPZT pin-compatible with other F2806x devices?

Yes, the TMS320F28068FPZT in the 100-pin PZP package shares identical pinout and footprint with TMS320F28069PZP, TMS320F28067PZP, and TMS320F28066PZP. All share the same signal assignments, power/ground distribution, and thermal pad layout-allowing hardware reuse across variants when memory or peripheral feature differences are managed in firmware.