Texas Instruments TMS320F28068FPNT

Overview

TMS320F28068FPNT from Texas Instruments is a C2000™ real-time microcontroller designed for digital power conversion and motor control. It integrates a 90-MHz C28x CPU, 256 KB flash memory, 50 KB RAM, six ePWM modules with high-resolution extensions (HRPWM), two HRCAP modules, and dual 12-bit ADCs with 3.5-MSPS sampling rate. It operates at 1.8 V core voltage and supports industrial temperature range (–40°C to 125°C) in a 80-pin LQFP package.

For engineers reviewing the TMS320F28068FPNT datasheet, TMS320F28068FPNT pinout, TMS320F28068FPNT application, or TMS320F28068FPNT equivalent, key selection criteria include HRPWM resolution (150-ps step), ePWM trip-zone protection, on-chip analog comparators, boot ROM IQmath library support, and dual independent ADC synchronization for interleaved power stage control.

Technical Context

The TMS320F28068FPNT implements a deterministic real-time architecture centered on the C28x 32-bit fixed-point CPU with FPU extension, enabling cycle-accurate control loop execution. Its clock system includes an internal oscillator, PLL with selectable multipliers (1–15×), and multiple low-power modes managed via SYSCLK and peripheral clock gating.

Peripheral integration targets closed-loop power electronics: six ePWM modules each support dead-band generation, asymmetric PWM, and TZ fault inputs; two HRCAP modules provide sub-nanosecond edge timing capture; dual 12-bit ADCs feature simultaneous sampling and hardware sequencing across up to 16 channels.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28069FPNT, the TMS320F28068FPNT offers identical real-time performance and peripheral set but 128 KB less flash-sufficient for most digital power designs with optimized IQmath usage. Against TMS320F28054PNT, it delivers higher resolution timing, more PWM channels, and faster loop execution-critical for multi-phase and resonant topologies.

Availability

TMS320F28068FPNT is available at Aetrix Electronics and suitable for digital power supplies, motor drives, and renewable energy inverters requiring stable component supply, long-term lifecycle assurance, and TI-qualified industrial temperature operation.

Supply support for TMS320F28068FPNT 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, specializing in analog, embedded processing, and digital signal processing technologies.

The TMS320F28068FPNT belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for deterministic control of power electronics, motor drives, and energy systems where nanosecond-level timing precision and integrated analog-peripheral co-processing are essential.

FAQ

What is the maximum operating frequency of the TMS320F28068FPNT CPU?

The TMS320F28068FPNT features a C28x CPU core rated for a maximum operating frequency of 90 MHz. This delivers a 11.1-ns instruction cycle time, enabling tight real-time control loops in high-speed power conversion applications. The CPU frequency is derived from the internal oscillator or external crystal through a configurable PLL multiplier, and all timing-critical peripherals-including ePWM and HRCAP-are synchronized to this clock domain. The TMS320F28068FPNT maintains full specification compliance across its entire industrial temperature range (–40°C to 125°C) at this speed.

Does the TMS320F28068FPNT support hardware-based fault protection?

Yes, the TMS320F28068FPNT includes a dedicated Trip-Zone (TZ) subsystem that provides hardware-level fault response with latency under 100 ns. Up to eight TZ inputs can be assigned to disable specific ePWM outputs immediately upon overcurrent, overtemperature, or external fault signals-bypassing CPU intervention. This capability is fully integrated with the ePWM modules and supports both cycle-by-cycle and one-shot shutdown modes. The TMS320F28068FPNT's TZ architecture ensures safe, predictable behavior in safety-critical power stages without software dependency.

What analog peripherals are integrated into the TMS320F28068FPNT?

The TMS320F28068FPNT integrates dual 12-bit analog-to-digital converters (ADCs), each capable of 3.5 million samples per second (MSPS), plus four on-chip analog comparators with programmable hysteresis and output routing to Trip-Zone inputs. The ADCs support simultaneous sampling, hardware sequencing across 16 channels, and flexible trigger sources including ePWM time-base events. These analog resources are electrically isolated via separate VDDA/VSSA rails and calibrated in production to ensure <±1 LSB INL across temperature. All analog functionality is accessible without external components in the TMS320F28068FPNT.

Is the TMS320F28068FPNT pin-compatible with other C2000™ microcontrollers?

The TMS320F28068FPNT shares the same 80-pin LQFP package and pinout with the TMS320F28069FPNT, enabling direct PCB reuse between the two devices. However, it is not pin-compatible with earlier F2802x or F2803x families due to differences in peripheral mapping, power domain assignments, and GPIO multiplexing. Pin compatibility with the TMS320F28069FPNT extends to all signal names, electrical characteristics, and thermal pad layout-making migration straightforward when additional flash capacity is needed. Always verify power sequencing and reset timing against the TMS320F28068FPNT datasheet before substitution.

What development tools support the TMS320F28068FPNT?

The TMS320F28068FPNT is fully supported by Texas Instruments' C2000™Ware software suite, Code Generation Tools (C2000 C/C++ Compiler), and ControlSuite legacy libraries. Hardware debugging is enabled via XDS100v3 or XDS200 emulators using the JTAG interface. TI's MotorControl SDK and PowerSUITE provide validated reference designs, GUI-based tuning tools, and real-time analysis for motor and power applications. All tools are freely downloadable from ti.com and include dedicated project templates, example code, and technical documentation for the TMS320F28068FPNT.