Texas Instruments TMS320F28069UPNT

Overview

TMS320F28069UPNT from Texas Instruments is a 90-MHz C28x-core real-time microcontroller with integrated FPU, CLA, and VCU, designed for closed-loop motor control and digital power applications. It delivers 11.11-ns instruction cycle time, 128KB flash, 50KB RAM, 16-channel 12-bit ADC at 3.46 MSPS, and 16 ePWM outputs (8 HRPWM-capable), operating from a single 3.3-V supply in industrial temperature range (–40°C to 105°C).

For engineers reviewing the TMS320F28069UPNT datasheet, TMS320F28069UPNT pinout, TMS320F28069UPNT application, or TMS320F28069UPNT equivalent, key selection criteria include HRPWM dual-edge modulation capability, on-chip analog comparators with DACs routed to ePWM trip zones, USB 2.0 device/host support, and CLA-accelerated floating-point control law execution independent of the main CPU.

Technical Context

The TMS320F28069UPNT implements a Harvard bus architecture with atomic instruction execution and unified memory programming model, enabling deterministic real-time response. Its C28x CPU executes native single-precision floating-point operations via dedicated FPU and offloads control loops to the independent 32-bit CLA core, which accesses shared DPSARAM and peripherals via dedicated buses.

Peripheral integration includes dual-sample-and-hold 12-bit ADC with ratio-metric VREFHI/VREFLO references, three eCAP modules, four HRCAP modules, two eQEP interfaces, and full-speed USB 2.0 with DMA support-enabling synchronized sensor acquisition, high-resolution position capture, and host communication without CPU intervention.

Key Specifications

Pinout & Package

The TMS320F28069UPNT is packaged in a 100-pin HTQFP (PZP) with PowerPAD™ thermally enhanced construction (14.0 mm × 14.0 mm body). The exposed thermal pad must be soldered to PCB ground plane using thermal vias for effective heat dissipation; it is not electrically connected to internal VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F280049C and TMS320F28379D, the TMS320F28069UPNT provides optimal balance of USB-enabled field serviceability, HRPWM precision, and industrial temperature reliability in compact 100-pin HTQFP-making it ideal for cost-sensitive, space-constrained motor and power control designs where single-core performance suffices.

Availability

TMS320F28069UPNT is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and EV on-board chargers requiring stable component supply across extended product lifecycles.

Supply support for TMS320F28069UPNT 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 consumer applications.

The TMS320F28069UPNT belongs to TI's C2000™ real-time MCU product line, engineered specifically for deterministic closed-loop control in motor drives, digital power, and energy systems-emphasizing analog integration, computational throughput, and functional safety readiness.

FAQ

What is the maximum ADC sampling rate supported by the TMS320F28069UPNT?

The TMS320F28069UPNT supports a maximum ADC throughput of 3.46 MSPS with 289-ns conversion time per sample. Its dual sample-and-hold architecture allows simultaneous sampling across up to 16 channels, and the ADC is DMA-accessible to minimize CPU overhead during high-rate acquisition sequences used in motor current reconstruction and grid synchronization.

Does the TMS320F28069UPNT include hardware security features?

Yes, the TMS320F28069UPNT integrates a Code Security Module (CSM) with 128-bit password protection for on-chip flash, RAM, and OTP memory. It also includes secure boot and one-time programmable (OTP) ROM for cryptographic key storage, preventing unauthorized firmware access or reverse engineering-critical for protecting proprietary motor control algorithms in industrial deployments.

Can the TMS320F28069UPNT operate without an external crystal?

Yes, the TMS320F28069UPNT contains two internal zero-pin oscillators (INTOSC1 and INTOSC2) that enable full functionality-including USB clocking-without any external crystal. An external crystal (1–20 MHz) or clock source may be used via X1/X2 pins for improved frequency stability, but it is optional for most industrial applications where ±1% timing tolerance is acceptable.

What peripheral resources does the TMS320F28069UPNT provide for motor position feedback?

The TMS320F28069UPNT provides two eQEP modules supporting quadrature encoder inputs, three eCAP modules for pulse-width or period measurement, and four HRCAP modules offering nanosecond-level capture resolution. These interfaces directly connect to resolver-to-digital converters, Hall sensors, or optical encoders-enabling precise rotor position estimation for FOC and commutation in BLDC and PMSM drives.

Is USB functionality available on all TMS320F28069UPNT variants?

Yes, USB 2.0 full-speed device/host capability is confirmed for the TMS320F28069U variant family, including the TMS320F28069UPNT. This is explicitly documented in Table 5-1 of the SPRS698J datasheet, where "USB" is marked "1(2)" for all U-series devices, with footnote (2) stating "USB is present on TMS320F2806xU, TMS320F2806xM, and TMS320F2806xF devices."