Texas Instruments TMS320F28068MPZT

Overview

TMS320F28068MPZT from Texas Instruments is a C2000™ real-time microcontroller featuring a 90-MHz C28x CPU, 256 KB flash memory, 50 KB RAM, integrated ePWM (16 channels), HRPWM (6 channels), eCAP (3 modules), and HRCAP (2 modules). It targets digital power control in AC-DC, DC-DC, and motor drive systems requiring high-resolution timing and deterministic interrupt response.

For engineers reviewing the TMS320F28068MPZT datasheet, TMS320F28068MPZT pinout, TMS320F28068MPZT application, or TMS320F28068MPZT equivalent, key selection criteria include PWM resolution (150-ps HRPWM step), analog integration (12-bit ADC with 3.47-MSPS sampling), real-time control latency (<100 ns GPIO toggle), and on-chip boot ROM with IQmath libraries for fast control loop implementation.

Technical Context

The TMS320F28068MPZT implements a deterministic real-time architecture centered on the C28x 32-bit fixed-point CPU core with Harvard memory bus, hardware loop support, and single-cycle 32×32-bit MAC. Its clock system includes an internal 10-MHz oscillator, PLL with 1–15× multiplication, and multiple low-power modes (IDLE, STANDBY, HALT) managed by the system control module.

Peripheral coordination is handled via the PIE interrupt controller supporting 96 vectorized interrupts across 12 groups, while the ePWM subsystem provides independent time-base counters, dead-band generation, trip-zone protection, and high-resolution phase-shift control-enabling precise gate driving for multi-phase interleaved converters and resonant topologies like ZVSFB.

Key Specifications

Pinout & Package

Package: 100-pin Low-Profile Quad Flat Package (LQFP), body size 14 mm × 14 mm, 0.5-mm pitch, RoHS-compliant, thermal pad exposed on underside.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28069MPZT and TMS320F280039CPMQR, the TMS320F28068MPZT delivers the highest HRPWM resolution (150 ps) in a mature 100-pin LQFP package, making it ideal for legacy-replacement and high-precision digital power designs where PCB footprint and timing fidelity are critical.

Availability

TMS320F28068MPZT is available at Aetrix Electronics and suitable for AC-DC server power supplies, industrial motor drives, and solar microinverters requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.

Supply support for TMS320F28068MPZT 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 wireless technologies with over 90 years of innovation in industrial and automotive electronics.

The TMS320F28068MPZT belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for digital power conversion, motor control, and energy infrastructure applications demanding deterministic timing, high-resolution PWM, and integrated analog peripherals.

FAQ

What is the maximum operating frequency of the TMS320F28068MPZT CPU core?

The TMS320F28068MPZT features a C28x CPU core rated for 90 MHz operation. This frequency is achieved using the on-chip PLL with configurable multiplication factor (1× to 15×) driven by the internal 10-MHz oscillator or an external clock source. All timing-critical peripherals-including ePWM, HRPWM, and ADC-are synchronized to this system clock, enabling deterministic real-time control loop execution within strict deadlines.

Does the TMS320F28068MPZT support hardware-based code security?

Yes, the TMS320F28068MPZT integrates a Code Security Module (CSM) that allows users to lock flash memory blocks using a 128-bit password. Once enabled, unauthorized read or write access to secured flash regions is blocked at the hardware level. The CSM also protects OTP memory and restricts access to certain registers, providing tamper-resistant firmware protection essential for commercial and industrial power products.

How many high-resolution PWM channels does the TMS320F28068MPZT provide?

The TMS320F28068MPZT includes six independent High-Resolution PWM (HRPWM) channels, each capable of 150-ps resolution for fine pulse-width adjustment. These channels operate alongside the standard 16-channel ePWM module and share time-base resources, allowing simultaneous use in applications such as multi-phase interleaved DC-DC converters where both coarse and fine timing control are required.

What analog-to-digital conversion capability does the TMS320F28068MPZT offer?

The TMS320F28068MPZT integrates a 12-bit successive-approximation register (SAR) ADC with up to 16 input channels and a maximum sampling rate of 3.47 million samples per second (MSPS). It supports simultaneous sampling across multiple channels using dual sample-and-hold circuits, and its internal reference and calibration features ensure <1 LSB integral nonlinearity across temperature and supply variations-critical for accurate current/voltage sensing in power electronics.

Is the TMS320F28068MPZT pin-compatible with other devices in the TMS320F2806x family?

Yes, the TMS320F28068MPZT is pin-compatible with the TMS320F28069MPZT in the same 100-pin LQFP (PZT) package. Both share identical pin assignments, electrical characteristics, and peripheral mapping, enabling drop-in replacement where increased flash (384 KB) or RAM (66 KB) is needed. However, it is not pin-compatible with devices in different packages (e.g., TQFP or VQFN variants) or unrelated families such as the F28003x series.