Texas Instruments TMS320F28068PZT

Overview

TMS320F28068PZT from Texas Instruments is a C2000™ real-time microcontroller featuring a 90-MHz C28x CPU, 256 KB flash memory, and integrated high-resolution PWM (HRPWM) with 150-ps resolution for precision motor control and power conversion. It includes six ePWM modules, two HRPWM channels, two HRCAP modules, and supports sensorless FOC via on-chip CLA acceleration.

For engineers reviewing the TMS320F28068PZT datasheet, TMS320F28068PZT pinout, TMS320F28068PZT application, or TMS320F28068PZT equivalent, key selection criteria include HRPWM timing resolution, CLA offload capability, analog-to-digital converter latency, flash security configuration, and ePWM trip-zone response time in closed-loop power systems.

Technical Context

The TMS320F28068PZT implements a dual-clock domain architecture: the C28x CPU runs at 90 MHz while the HRPWM subsystem operates with independent 150-ps fine-resolution timing control. Its Control Law Accelerator (CLA) executes floating-point math independently of the main CPU, enabling deterministic execution of field-oriented control (FOC) loops within 1.2 μs.

On-chip peripherals include a 12-bit, 3.5-MSPS ADC with 16-channel input multiplexer and hardware sequencer, dual 32-bit CPU timers, and a configurable PIE interrupt controller supporting up to 96 peripheral interrupts with vectorized dispatch. The device boots from internal ROM with configurable boot modes including SPI, I²C, and CAN.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad (PZT suffix); 100-pin square leaded quad flat pack, 14 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28068PZT, the F28069PZT provides enhanced CPU-level floating-point throughput at marginally higher cost and power, while the F280049CPTT trades HRPWM precision for higher ADC resolution and modern peripheral integration - choice depends on whether nanosecond-level PWM timing or high-fidelity analog acquisition dominates system requirements.

Availability

TMS320F28068PZT is available at Aetrix Electronics and suitable for motor drives, industrial power supplies, renewable energy inverters, and EV onboard chargers requiring stable component supply across extended production lifecycles.

Supply support for TMS320F28068PZT 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 consumer markets since 1930.

The TMS320F28068PZT belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for digital power and motor control applications demanding deterministic low-latency execution, high-resolution timing, and integrated analog signal chain support.

FAQ

What is the maximum operating frequency of the TMS320F28068PZT CPU?

The TMS320F28068PZT features a C28x CPU core rated for 90 MHz operation. This frequency is achieved using an internal PLL with configurable multiplier/divider settings and requires stable 3.3-V supply rails and proper decoupling. All timing-critical peripherals-including HRPWM, ePWM, and ADC-scale synchronously with this clock, ensuring deterministic real-time behavior in closed-loop control applications.

Does the TMS320F28068PZT include hardware-based security features?

Yes, the TMS320F28068PZT integrates a Code Security Module (CSM) that supports 128-bit password protection for flash memory. Once enabled, CSM prevents unauthorized readout or reprogramming of secured flash sectors and locks access to critical registers. The device also includes secure boot ROM with encrypted firmware validation, making it suitable for applications requiring intellectual property protection and anti-tampering compliance.

How many high-resolution PWM channels does the TMS320F28068PZT support?

The TMS320F28068PZT supports two independent HRPWM channels, each capable of 150-ps resolution for duty cycle and phase control. These channels operate alongside six standard ePWM modules and can be configured to enhance specific PWM outputs (e.g., EPWM1A/B) with fine-grained timing adjustments-critical for minimizing dead-time errors in high-frequency resonant converters.

What analog-to-digital converter specifications apply to the TMS320F28068PZT?

The TMS320F28068PZT integrates a 12-bit, 3.5-MSPS ADC with 16 input channels, hardware sequencer, and simultaneous sampling capability across up to four channels. Conversion latency is ≤100 ns, and effective number of bits (ENOB) exceeds 11.2 bits under typical industrial conditions. Dedicated analog supply (VDDA/VSSA) and internal reference ensure stability across temperature and supply variations.

Is the TMS320F28068PZT pin-compatible with other C2000 microcontrollers in the F2806x family?

Yes, the TMS320F28068PZT shares identical LQFP-100 (PZT) package pinout with TMS320F28062PZT, TMS320F28063PZT, and TMS320F28069PZT. This enables direct PCB reuse across variants differing only in flash size, RAM allocation, or CPU feature set-such as presence of FPU-without layout changes or adapter boards.