Texas Instruments TMS320F28068PNT

Overview

TMS320F28068PNT 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 3.47-MSPS aggregate sampling rate. It targets closed-loop control in AC inverters, DC/DC converters, and servo drives.

For engineers reviewing the TMS320F28068PNT datasheet, TMS320F28068PNT pinout, TMS320F28068PNT application, or TMS320F28068PNT equivalent, key selection criteria include HRPWM resolution (150-ps step), ePWM dead-band programmability, on-chip VREG/BOR/POR, IQmath library support in ROM, and boot modes via SPI/I2C/eCAN/SCI/GPIO.

Technical Context

The TMS320F28068PNT implements a deterministic real-time architecture centered on the C28x 32-bit CPU core with FPU and TMU, enabling cycle-accurate control loop execution. Its clock system includes an internal oscillator, PLL with 1–12× multiplier, and low-power mode support down to LPM3.

Peripheral integration focuses on power electronics timing: six ePWM modules each support independent TBCLK, AQ actions, DB generation, and TZ fault protection; two HRCAP modules provide sub-nanosecond edge capture resolution; dual 12-bit ADCs feature simultaneous sampling across up to 16 channels with hardware sequencing.

Key Specifications

Pinout & Package

Package: 80-pin Low-Profile Quad Flat Package (LQFP), JEDEC MO-207AD, 12 mm × 12 mm body, 0.5 mm pitch, exposed thermal pad (EP), lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28068PNT, the TMS320F28069MPT offers higher performance in same package while the TMS320F280039CPNQ delivers next-gen features in compact form - both require validation of HRPWM calibration, ADC timing, and boot ROM dependencies before migration.

Availability

TMS320F28068PNT 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-authorized traceability.

Supply support for TMS320F28068PNT 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 TMS320F28068PNT belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for deterministic control of power electronics systems including motor drives, solar inverters, and digital power supplies.

FAQ

What is the maximum operating frequency of the TMS320F28068PNT?

The TMS320F28068PNT operates at a maximum CPU frequency of 90 MHz, achieved via its on-chip PLL with programmable multiplier (1× to 12×) and DIVSEL configuration. This yields a 11.1-ns instruction cycle time, enabling sub-microsecond control loop execution. The device maintains timing integrity across its industrial temperature range (–40°C to 125°C) with guaranteed performance under specified VDD and VDDA conditions. All timing parameters in the TMS320F28068PNT datasheet are validated at this frequency.

Does the TMS320F28068PNT include on-chip flash memory with error correction?

Yes, the TMS320F28068PNT integrates 256 KB of on-chip flash memory with built-in error correction circuitry (ECC) and 4 KB of one-time-programmable (OTP) memory. The flash supports erase/write cycling, sector protection, and secure locking via the Code Security Module (CSM). ECC detects and corrects single-bit errors and detects double-bit errors, ensuring firmware reliability in electrically noisy environments typical of power electronics applications. This flash architecture is fully supported by TI's C2000 Flash API in ROM.

How many high-resolution PWM channels does the TMS320F28068PNT support?

The TMS320F28068PNT supports six ePWM modules, each extended with High-Resolution PWM (HRPWM) capability. Each ePWM module provides two complementary outputs (A/B), resulting in up to 12 HRPWM channels. Each channel achieves 150-ps resolution through microstep modulation of the TBPRD and CMPA registers, enabling precise dead-time control and phase-shift tuning essential for SiC/GaN-based resonant converters. HRPWM operation is calibrated using the Scale Factor Optimizer (SFO) library included in ROM.

What ADC performance specifications apply to the TMS320F28068PNT?

The TMS320F28068PNT features two independent 12-bit successive-approximation register (SAR) ADCs with a combined sampling rate of 3.47 MSPS. Each ADC supports up to 16 input channels via multiplexer, with hardware sequencing, simultaneous sampling capability, and programmable sample-and-hold window. Integral nonlinearity is ±1 LSB, and effective number of bits (ENOB) is 11.2 bits at 1-MHz input frequency. These ADCs are synchronized to the system clock and support triggered acquisition from ePWM and timer events - critical for current-loop sampling in motor control.

Is the TMS320F28068PNT compatible with TI's C2000Ware software framework?

Yes, the TMS320F28068PNT is fully supported by TI's C2000Ware software development kit, including device-specific drivers, control law libraries (e.g., PID, FOC, SVM), and example projects for digital power and motor control. C2000Ware provides register-level abstraction, HALCoGen-compatible configuration tools, and integration with CCS IDE and TI's IQmath library. All peripheral initialization, interrupt handling, and HRPWM calibration routines for the TMS320F28068PNT are validated and documented in the latest C2000Ware release.