Texas Instruments TMS320F28035PNQ

Overview

TMS320F28035PNQ from Texas Instruments is a 60-MHz C28x-core real-time microcontroller with integrated Control Law Accelerator (CLA), 64KB flash, 10KB SARAM, 12-bit ADC (4.6 MSPS), 14 ePWM channels, and AEC Q100-qualified automotive-grade operation (–40°C to 125°C). It targets high-precision motor control in EV charging power modules and solar string inverters.

For engineers reviewing the TMS320F28035PNQ datasheet, TMS320F28035PNQ pinout, TMS320F28035PNQ application, or TMS320F28035PNQ equivalent, key selection considerations include CLA-accelerated closed-loop timing, HRPWM dual-edge modulation capability, on-chip comparator routing to PWM, 3.3V single-rail operation, and LQFP-80 package compatibility with industrial thermal and layout constraints.

Technical Context

The TMS320F28035PNQ implements a Harvard-architecture C28x CPU with atomic instructions and zero-wait-state memory access, enabling deterministic 16.67 ns cycle-time execution. Its CLA operates independently of the main CPU using 32-bit floating-point math, offloading time-critical control loops such as field-oriented control (FOC) commutation.

Peripheral integration includes ePWM modules with high-resolution extensions (HRPWM), eCAP/HRCAP for precise edge capture, eQEP for position feedback, and an ADC with dual sample-and-hold supporting synchronized multi-channel sampling. All analog inputs are referenced to VREFHI/VREFLO with fixed 0–3.3V full-scale range.

Key Specifications

Pinout & Package

Package: Low-Profile Quad Flatpack (LQFP), 80-pin, body size 12.0 mm × 12.0 mm, RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28035PNQ, the TMS320F28035PAG offers identical real-time performance in a smaller footprint but sacrifices GPIO flexibility and HRCAP functionality, while the TMS320F28034PN reduces cost and complexity by omitting CLA and HRPWM-making it suitable only for less demanding closed-loop timing requirements.

Availability

TMS320F28035PNQ is available at Aetrix Electronics and suitable for EV on-board chargers, solar string inverters, and industrial AC drive control requiring stable component supply, long-term automotive qualification, and production-ready firmware security.

Supply support for TMS320F28035PNQ 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 connectivity technologies with over 90 years of innovation in power management and real-time control.

The TMS320F28035PNQ belongs to TI's C2000™ real-time control MCU product line, designed specifically for high-precision, low-latency closed-loop systems in motor control, digital power, and renewable energy conversion.

FAQ

What is the maximum operating frequency and instruction cycle time of the TMS320F28035PNQ?

The TMS320F28035PNQ operates at a maximum CPU frequency of 60 MHz, delivering a 16.67 ns instruction cycle time. This timing is guaranteed across its full automotive temperature range (–40°C to 125°C) and supports deterministic real-time execution for control loops requiring sub-microsecond latency. The TMS320F28035PNQ achieves this with zero-wait-state access to on-chip SARAM and optimized Harvard bus architecture.

Does the TMS320F28035PNQ include a Control Law Accelerator (CLA), and what functions does it support?

Yes, the TMS320F28035PNQ includes a dedicated 32-bit floating-point Control Law Accelerator (CLA) that executes control algorithms independently of the main C28x CPU. It supports real-time tasks such as Park/Clarke transforms, PI regulators, space-vector modulation, and observer-based estimators-enabling parallel loop execution without CPU resource contention. The CLA is accessible only on the TMS320F28033 and TMS320F28035 variants within the F2803x family.

What ADC performance specifications apply to the TMS320F28035PNQ?

The TMS320F28035PNQ features a 12-bit analog-to-digital converter with 4.6 MSPS sampling rate, 216.67 ns conversion time, and dual sample-and-hold capability. It supports up to 16 input channels with fixed 0–3.3V full-scale range and ratio-metric referencing via VREFHI/VREFLO. This ADC is optimized for synchronized multi-channel acquisition in motor current sensing and grid voltage monitoring applications.

Is the TMS320F28035PNQ pin-compatible with other devices in the F2803x family?

No, the TMS320F28035PNQ is not universally pin-compatible across the F2803x family. While it shares the same 80-pin LQFP (PN) package footprint with TMS320F28030PN through TMS320F28034PN, peripheral pin mappings differ-for example, HRCAP modules and certain comparator outputs are only available on TMS320F28035PNQ and TMS320F28033PNQ. Board reuse requires verification of signal routing against the specific variant's pin diagram.

What automotive qualification does the TMS320F28035PNQ hold, and what does the 'Q' suffix indicate?

The 'Q' suffix in TMS320F28035PNQ denotes AEC Q100 qualification for automotive applications, specifically Grade 1 (–40°C to 125°C). This certification covers stress testing for reliability, failure mechanisms, and robustness under automotive environmental conditions-including thermal cycling, humidity bias, and ESD. The TMS320F28035PNQ is approved for use in safety-critical subsystems such as on-board chargers and traction inverter gate drivers.