Texas Instruments TMS320F28068UPZPS

Overview

TMS320F28068UPZPS from Texas Instruments is a C2000™ real-time microcontroller designed for digital power conversion and motor control. It features a 90-MHz C28x CPU, 256 KB flash memory, 50 KB RAM, integrated ePWM (16 channels), HRPWM (6 channels with 150-ps resolution), and eCAP/HRCAP modules. Used in industrial inverters, DC/DC converters, and servo drives where precise timing and high-resolution modulation are critical.

For engineers reviewing the TMS320F28068UPZPS datasheet, TMS320F28068UPZPS pinout, TMS320F28068UPZPS application, or TMS320F28068UPZPS equivalent, key selection criteria include PWM resolution, on-chip analog interfaces (12-bit ADC with 3.47-MSPS sampling), real-time control latency, and support for closed-loop field-oriented control (FOC) in PMSM/BLDC systems.

Technical Context

The TMS320F28068UPZPS implements a deterministic real-time architecture centered on the C28x 32-bit CPU core with IEEE-754 single-precision FPU and TMU (Trigonometric Math Unit). Its clock system includes an internal 10-MHz oscillator, PLL with 1–10× multiplier, and multiple low-power modes managed by the System Control module.

Peripheral integration targets high-fidelity power stage control: dual 12-bit ADCs (16-channel, simultaneous sampling), 16 ePWM channels with dead-band, trip-zone, and event-trigger logic, plus six HRPWM outputs enabling sub-nanosecond duty-cycle adjustment via microstep control and SFO calibration.

Key Specifications

Pinout & Package

TMS320F28068UPZPS is housed in a 100-pin LQFP (PZP) package with 0.5-mm pitch, thermal pad, and JEDEC-standard footprint. Pin functions are defined per TI SPRUH18I Rev. J (June 2022), Section 4.3.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28068UPZPS, the F28069M offers more flash for complex safety-certified firmware, while the F280049C trades HRPWM capability for higher ADC resolution and CLA acceleration-making it optimal for high-bandwidth current control but unsuitable for ZVS-critical designs.

Availability

TMS320F28068UPZPS is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and EV onboard chargers requiring stable component supply and long-term production continuity.

Supply support for TMS320F28068UPZPS 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 digital signal processing technologies, with over 90 years of innovation in industrial and automotive electronics.

The TMS320F2806x series belongs to TI's C2000™ real-time microcontroller portfolio, engineered specifically for high-precision digital power and motor control applications demanding deterministic timing, high-resolution PWM, and integrated analog signal chain.

FAQ

What is the maximum operating frequency of the TMS320F28068UPZPS CPU?

The TMS320F28068UPZPS CPU operates at a maximum frequency of 90 MHz, delivering a 11.1-ns instruction cycle time. This speed enables sub-microsecond execution of motor control algorithms such as field-oriented control (FOC) and digital power compensation loops. The device achieves this via an internal PLL with selectable multipliers and a stable 10-MHz crystal or external clock source. All timing-critical peripherals-including ePWM, HRPWM, and ADC-are synchronized to this clock domain.

Does the TMS320F28068UPZPS support hardware-based encryption or secure boot?

The TMS320F28068UPZPS includes a Code Security Module (CSM) that provides 128-bit password protection for on-chip flash and OTP memory. While it does not implement AES or SHA cryptographic engines, the CSM prevents unauthorized readout of firmware and supports secure emulation through debug authentication. Boot ROM contains trusted initialization code, and the device supports secure serial boot via SCI, SPI, or I²C with checksum verification-ensuring authenticated firmware loading before execution of TMS320F28068UPZPS application code.

How many high-resolution PWM channels does the TMS320F28068UPZPS provide?

The TMS320F28068UPZPS integrates six independent High-Resolution PWM (HRPWM) channels, each capable of 150-ps resolution via microstep control and calibrated using the Scale Factor Optimizer (SFO) library. These HRPWM outputs are paired with standard ePWM modules (EPWM7–EPWM12) and support phase-shifted operation, dead-band insertion, and trip-zone protection. This configuration enables precise control of resonant converters like LLC and phase-shifted full-bridge topologies where nanosecond-level timing accuracy directly impacts ZVS performance and efficiency in TMS320F28068UPZPS-based designs.

What analog-to-digital converter specifications does the TMS320F28068UPZPS include?

The TMS320F28068UPZPS features two independent 12-bit analog-to-digital converters (ADCs), each supporting up to 16 input channels and simultaneous sampling at up to 3.47 MSPS aggregate rate. Each ADC includes programmable gain (1×/2×/4×), hardware sequencing, and dedicated sample-and-hold circuits. Inter-channel sampling skew is less than 100 ns, making it suitable for three-phase current reconstruction in motor control. Calibration data is stored in OTP, and conversion results are accessible via DMA or CPU polling-critical for real-time feedback in TMS320F28068UPZPS control loops.

Is the TMS320F28068UPZPS pin-compatible with other C2000™ microcontrollers in the F2806x family?

Yes, the TMS320F28068UPZPS is pin-compatible with other 100-pin LQFP variants in the F2806x family, including TMS320F28062UPZPS, TMS320F28063UPZPS, and TMS320F28069MPZPS. All share identical pin assignments for power, ground, GPIO, ePWM, eCAP, ADC, and communication interfaces. Differences lie in internal memory size, HRPWM channel count, and feature enablement-not physical layout. This allows direct PCB reuse across firmware-optimized variants, simplifying design migration and inventory management for TMS320F28068UPZPS-based platforms.