Texas Instruments TMS320F28068MPFPQ

Overview

TMS320F28068MPFPQ from Texas Instruments is a 90-MHz C28x-core real-time microcontroller with integrated FPU, CLA, and VCU, designed for high-precision motor control and digital power conversion. It delivers 11.11-ns instruction cycle time, 12-bit 3.46-MSPS ADC with dual sample-and-hold, and 16 ePWM channels (8 HRPWM-capable), deployed in EV charging station power modules and solar string inverters.

For engineers reviewing the TMS320F28068MPFPQ datasheet, TMS320F28068MPFPQ pinout, TMS320F28068MPFPQ application, or TMS320F28068MPFPQ equivalent, key selection criteria include its AEC Q100-qualified automotive temperature range (–40°C to 125°C), 80-pin HTQFP PowerPAD™ package, on-chip security key, and USB 2.0 device/host support.

Technical Context

The TMS320F28068MPFPQ implements a Harvard bus architecture with atomic operations and unified memory programming, enabling deterministic real-time control. Its CLA executes floating-point math independently of the main CPU, while the VCU accelerates complex multiply, Viterbi, and CRC operations-critical for field-oriented control (FOC) algorithms.

Peripheral integration includes three eCAP modules, four HRCAP modules, two eQEP interfaces, and dual 4-level FIFO SCI/UARTs. The ADC supports ratio-metric references (VREFHI/VREFLO) and DMA-accessible result registers, minimizing software overhead in closed-loop timing-critical applications.

Key Specifications

Pinout & Package

Package: 80-pin HTQFP PowerPAD™ (PFP), thermally enhanced with exposed die pad requiring PCB ground connection for thermal management. Pin count and signal mapping match TI's official 80-pin PFP pinout diagram (Figure 6-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28069PFPQ, the TMS320F28068MPFPQ trades flash/RAM capacity and VCU for cost-sensitive automotive OBC and inverter applications; versus TMS320F280049CPZPR, it retains USB and simplifies migration from legacy F2806x designs without requiring CLB re-architecting.

Availability

TMS320F28068MPFPQ is available at Aetrix Electronics and suitable for EV charging station power modules, solar string inverters, and automotive on-board chargers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TMS320F28068MPFPQ 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The TMS320F28068M belongs to TI's C2000™ real-time MCU product line, engineered specifically for closed-loop control in motor drives, digital power, and energy conversion systems where deterministic timing and analog integration are critical.

FAQ

What is the maximum operating frequency and instruction cycle time of the TMS320F28068MPFPQ?

The TMS320F28068MPFPQ operates at a maximum CPU frequency of 90 MHz, yielding an instruction cycle time of 11.11 ns. This timing is guaranteed across its full AEC Q100 temperature range (–40°C to 125°C) and 3.3-V supply, enabling deterministic execution of time-critical control loops in motor and power applications. The TMS320F28068MPFPQ achieves this performance using a C28x core with Harvard architecture and zero-wait-state memory access.

Does the TMS320F28068MPFPQ support USB functionality, and what modes are available?

Yes, the TMS320F28068MPFPQ integrates a full-speed USB 2.0 controller supporting both device mode and full-speed or low-speed host mode. Its USB0DP and USB0DM pins implement the differential physical layer, and the peripheral is DMA-accessible to minimize CPU load during data transfer. This capability is confirmed in the Device Comparison table and applies specifically to the 'M' variant (TMS320F28068M), including the TMS320F28068MPFPQ.

How does the CLA in the TMS320F28068MPFPQ improve real-time control performance?

The CLA in the TMS320F28068MPFPQ is a 32-bit floating-point math accelerator that executes control law code independently of the main C28x CPU. It accesses shared memory and peripherals-including ePWM, ADC, and GPIO-enabling parallel execution of inner-loop control (e.g., FOC current regulation) while the CPU handles communication, diagnostics, and supervisory tasks. This architecture reduces total loop latency and improves system responsiveness without increasing CPU utilization. The TMS320F28068MPFPQ uses this CLA to sustain sub-microsecond control cycles in demanding applications like servo drives.

What analog features distinguish the TMS320F28068MPFPQ from entry-level C2000 MCUs?

The TMS320F28068MPFPQ includes a 12-bit, 3.46-MSPS ADC with dual sample-and-hold, 16 input channels, and ratio-metric reference support (VREFHI/VREFLO). It also integrates three analog comparators with internal 10-bit DAC references, directly routable to ePWM trip zones for hardware-fault response. Unlike entry-level F2802x/F2803x devices, the TMS320F28068MPFPQ adds VCU acceleration for complex math and CRC, and supports simultaneous high-speed analog acquisition and PWM update-key for multi-sensor motor control. These features are documented in the SPRS698J datasheet for the F28068M variant.

Is the TMS320F28068MPFPQ pin-compatible with other F2806x family members in the same package?

Yes, the TMS320F28068MPFPQ shares identical pinout and electrical characteristics with other 80-pin PFP variants in the F2806x family-including TMS320F28069PFPQ and TMS320F28067PFPQ-as confirmed by TI's Device Comparison table and Figure 6-1 pin diagram. Signal assignments, power domains, and peripheral mappings are consistent across these PFP-packaged devices, enabling hardware reuse and simplified migration. However, functional differences (e.g., flash size, VCU presence) require firmware validation during replacement.