Texas Instruments TMS320F28035PNT

Overview

TMS320F28035PNT from Texas Instruments is a 32-bit real-time microcontroller featuring a 60-MHz C28x CPU, integrated Control Law Accelerator (CLA), 64KB on-chip flash, 10KB SARAM, and high-resolution PWM (HRPWM) for closed-loop motor control. It operates from a single 3.3V supply, includes an on-chip voltage regulator, and supports industrial temperature range (–40°C to 105°C) in an 80-pin LQFP package.

For engineers reviewing the TMS320F28035PNT datasheet, TMS320F28035PNT pinout, TMS320F28035PNT application, or TMS320F28035PNT equivalent, key selection criteria include CLA-accelerated control loop execution, dual-edge HRPWM timing resolution, 12-bit ADC with 4.6 MSPS sampling, eCAN/LIN/SCI serial interfaces, and code-security module with 128-bit key protection.

Technical Context

The TMS320F28035PNT implements a Harvard-architecture C28x CPU with atomic instruction support and zero-wait-state memory access, enabling deterministic real-time interrupt response. Its CLA executes floating-point control law code independently of the main CPU, reducing latency in servo and inverter feedback loops.

Peripheral integration includes three 32-bit CPU timers, 14 ePWM channels (7 with HRPWM), 16-channel 12-bit ADC with dual sample-and-hold, three comparators with integrated DACs, and dedicated capture modules (eCAP/HRCAP/eQEP) for position and timing measurement in motor drives.

Key Specifications

Pinout & Package

Package: 80-pin Low-Profile Quad Flatpack (LQFP), 12.0 mm × 12.0 mm body, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28034PNT and TMS320F28035PAG, the TMS320F28035PNT delivers maximum peripheral density (45 GPIO, 14 ePWM, 2 HRCAP, 1 eQEP) and largest memory (64KB flash/10KB SARAM) in the F2803x family, making it optimal for complex multi-axis servo drives and high-channel-count solar optimizers.

Availability

TMS320F28035PNT is available at Aetrix Electronics and suitable for industrial motor drives, solar inverter power modules, and EV on-board charger designs requiring stable component supply across multi-year production cycles.

Supply support for TMS320F28035PNT 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 TMS320F2803x product line is designed specifically for real-time digital control in power electronics applications-including motor drives, renewable energy inverters, and industrial power supplies-emphasizing deterministic timing, analog integration, and computational acceleration.

FAQ

What is the maximum operating frequency of the TMS320F28035PNT CPU core?

The TMS320F28035PNT features a C28x 32-bit CPU core rated for 60 MHz operation, corresponding to a 16.67 ns instruction cycle time. This frequency is fully supported across the specified industrial temperature range (–40°C to 105°C) and is enabled by on-chip PLL circuitry with external crystal or oscillator input. All timing-critical peripherals-including ePWM, ADC, and CLA-are synchronized to this clock domain.

Does the TMS320F28035PNT include hardware-based security features?

Yes, the TMS320F28035PNT integrates a dedicated code-security module with 128-bit encryption key storage and lock mechanism. This module protects on-chip flash, SARAM, and OTP memory blocks from unauthorized read/write access. The security key is programmed once during manufacturing or initial programming and cannot be retrieved or overwritten, ensuring firmware intellectual property protection in deployed systems.

How many high-resolution PWM (HRPWM) channels does the TMS320F28035PNT support?

The TMS320F28035PNT supports seven high-resolution ePWM channels (EPWM1–EPWM7), each capable of sub-nanosecond timing adjustment via dual-edge control. These HRPWM outputs are implemented within the standard ePWM module and share the same 14 total ePWM channels available on the device. HRPWM functionality is enabled per-channel through dedicated control registers and requires no additional hardware resources.

What analog-to-digital converter (ADC) performance does the TMS320F28035PNT provide?

The TMS320F28035PNT includes a 12-bit successive-approximation register (SAR) ADC with 16 input channels, 4.6 MSPS sampling rate, and 216.67 ns conversion time. It supports dual sample-and-hold for simultaneous sampling, ratio-metric reference (VREFHI/VREFLO), and direct routing to ePWM trip zones. The ADC operates across the full 0–3.3V input range and is optimized for low-latency current/voltage sensing in power conversion applications.

Is the TMS320F28035PNT pin-compatible with other devices in the F2803x family?

Within the same package variant, the TMS320F28035PNT is pin-compatible with other 80-pin LQFP (PN) devices in the F2803x family-including TMS320F28034PNT and TMS320F28033PNT-sharing identical pin assignments, electrical characteristics, and mechanical footprint. However, peripheral enablement (e.g., CLA, HRCAP, eQEP count) and memory size differ between variants, requiring firmware validation for full feature utilization.