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Texas Instruments TMS320F28051PNT
- Part No.:
- TMS320F28051PNT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
TMS320F28051PNT.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
TMS320F28051PNT from Texas Instruments is a 60-MHz C28x-core real-time microcontroller with integrated CLA accelerator, 12-bit ADC (2 MSPS), 14 ePWM channels, and analog front-end including 6 comparators, 2 internal DACs, and 3 PGAs - deployed in motor control subsystems for HVAC inverters and BLDC drives.
For engineers reviewing the TMS320F28051PNT datasheet, TMS320F28051PNT pinout, TMS320F28051PNT application, or TMS320F28051PNT equivalent, key selection criteria include CPU+CLA dual-execution capability, 80-pin LQFP package with 42 GPIOs, single 3.3-V supply operation, and AEC-Q100-qualified temperature range (–40°C to 125°C) for industrial and automotive-grade motion control.
Technical Context
The TMS320F28051PNT implements a Harvard-architecture C28x CPU executing at 60 MHz (16.67-ns cycle time) with atomic operations and unified memory model, paired with an independent 32-bit floating-point CLA for real-time control law execution without CPU intervention.
Its analog subsystem integrates a 12-bit ADC with 2-MSPS sampling rate and 500-ns conversion time, dual-sample-and-hold, and a configurable AFE comprising six comparators (two with internal 6-bit DAC references), three programmable-gain amplifiers (gain ≈ 3, 6, or 11), and one buffered reference DAC - all mapped to dedicated analog ground pins (M1GND, M2GND, PFCGND).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | C28x 32-bit fixed-point core at 60 MHz; enables deterministic real-time loop execution in motor control firmware. |
| CLA Accelerator | Independent 32-bit floating-point math accelerator; offloads PID, FOC, and observer calculations from main CPU. |
| ADC Performance | 12-bit, 2-MSPS, 500-ns conversion time; supports high-resolution current/voltage sensing in fast-switching inverters. |
| Analog Front End | 6 comparators, 2 internal DACs, 3 PGAs, 1 buffered VREFOUT DAC; enables direct PWM trip generation and signal conditioning without external components. |
| ePWM Channels | 14 independent ePWM outputs with dead-band, trip-zone, and synchronization; sufficient for 3-phase inverter + auxiliary control signals. |
| Package & Temp | 80-pin LQFP (12 mm × 12 mm); rated for –40°C to 125°C (S-grade), qualified per AEC Q100 for automotive applications. |
| Memory | 16K-word on-chip Flash, 6K-word SARAM; supports secure boot, dual-zone security, and 128-bit encryption key storage. |
Pinout & Package
80-pin Low-Profile Quad Flatpack (LQFP), 12.0 mm × 12.0 mm body size, 0.5-mm pitch. Pin assignments follow TI's standardized 2805x 80-pin PN footprint with dedicated analog power/ground separation (VDDA/VSSA, M1GND/M2GND/PFCGND) and JTAG-compliant boundary scan support.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VSSA | Analog power/ground | Isolates ADC and comparator circuitry from digital noise; requires local 2.2-μF decoupling. |
| M1GND / M2GND / PFCGND | Analog amplifier grounds | Dedicated return paths for PGA/comparator channels A1/A3/B1, A6/B4/B6, and B7 respectively - prevents crosstalk in precision analog sensing. |
| ADCINA0–7 / ADCINB0–7 | ADC input channels | Two independent 8-channel groups (A/B) with op-amp inputs marked; supports differential or single-ended acquisition with ratio-metric reference (VREFHI/VREFLO). |
| GPIO0–42 | Configurable I/O | 42 multiplexed pins default to GPIO at reset; support ePWM, eCAP, eQEP, SCI/UART, SPI, I²C, and eCAN alternate functions with per-pin pullup control. |
| XRS | Reset I/O | Open-drain reset input/output; driven low internally during POR/BOR/watchdog timeout; requires external 2.2–10 kΩ pullup to VDDIO. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-zone security module | Enables separate code/data protection for bootloader (Zone 1) and application (Zone 2); prevents firmware reverse-engineering via 128-bit encrypted key lock. |
| Integrated voltage regulator | On-chip 1.8-V VREG eliminates need for external core rail; enabled by tying VREGENZ to VSS - reduces BOM count and layout complexity. |
| Real-time debug interface | IEEE 1149.1 JTAG with TRST/TCK/TMS/TDI/TDO pins; supports hardware breakpoints, real-time trace, and analysis without halting CPU or CLA execution. |
| Enhanced analog integration | 6 comparators routed directly to ePWM trip-zones; 3 PGAs with discrete gain settings (≈3/6/11); 2 internal DACs for reference generation - replaces discrete op-amp/DAC circuits. |
| Single-supply operation | 3.3-V nominal supply powers CPU, I/O, Flash, and analog blocks; no power sequencing required - simplifies power tree design for cost-sensitive industrial drives. |
Applications
| Air Conditioner Outdoor Unit | Inverter & Motor Control |
|---|---|
Use Scenario: Variable-speed compressor drive in residential and commercial HVAC systems requiring precise torque and efficiency control across wide load ranges. IC Role / Device Role / Timing Role: Real-time controller executing field-oriented control (FOC) algorithms via C28x+CLA dual-core architecture; synchronizes 14 ePWM outputs to gate drivers with sub-100-ns jitter. Use Value: Integrated 2-MSPS ADC and 6 comparators enable fast current-loop closure (<5 μs) and overcurrent protection without external fault logic. | Use Scenario: Closed-loop speed/torque regulation of 3-phase PMSM or induction motors in industrial automation and robotics. IC Role / Device Role / Timing Role: Central motion controller managing ePWM modulation, encoder feedback (eQEP), capture-based position sensing (eCAP), and analog current sensing (ADC + PGAs). Use Value: On-chip CLA accelerates FOC math (Clarke/Park transforms, PI loops) while CPU handles communication (SCI/UART, eCAN) and system supervision - improves loop bandwidth by >3× vs. CPU-only execution. |
| AC-input BLDC Motor Drive | DC-input BLDC Motor Drive |
Use Scenario: Fan/pump drives powered from rectified AC mains, requiring PFC stage control and motor commutation in a single chip. IC Role / Device Role / Timing Role: Dual-role controller: manages interleaved PFC using GPIO34/CTRIPPFCOUT and EPWM7A/B, while simultaneously executing sensorless BLDC commutation via eCAP zero-crossing detection and ePWM timing. Use Value: Dedicated PFC ground (PFCGND) and comparator routing to ePWM trip zones allow hardware-level fault response (<100 ns) - critical for maintaining PFC stability under transient line conditions. | Use Scenario: Battery-powered tools, e-bikes, and portable appliances using 24–48-V DC input with high-efficiency trapezoidal or FOC commutation. IC Role / Device Role / Timing Role: System-on-chip controller handling battery voltage monitoring (ADC), thermal protection (on-chip temp sensor), gate driver timing (ePWM), and CAN bus diagnostics (eCAN). Use Value: Single 3.3-V supply and integrated VREG reduce power conversion stages; 125°C-rated S-grade operation ensures reliability in thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar real-time motor control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320F28052PNT | 8K-word SARAM (vs. 6K), same 16K Flash, identical pinout and peripheral set. | Higher RAM headroom for larger control algorithms or dual-loop implementations (e.g., PFC + motor control). | Select when additional on-chip RAM is required without changing PCB layout or firmware porting effort. |
| TMS320F28054PNT | 32K-word Flash (vs. 16K), 10K-word SARAM, CLA included (same as TMS320F28051PNT). | Supports more complex firmware (e.g., multi-axis coordination, safety monitors, OTA updates) while retaining identical analog/peripheral feature set. | Choose when future firmware scalability or functional safety partitioning demands larger non-volatile storage. |
Compared with TMS320F28052PNT and TMS320F28054PNT, the TMS320F28051PNT delivers optimal cost-performance balance for single-axis, resource-constrained motor control - offering full CLA acceleration, 6K SARAM, and complete analog integration in the smallest Flash configuration of the F2805x family.
Availability
TMS320F28051PNT is available at Aetrix Electronics and suitable for HVAC outdoor units, BLDC motor drives, and industrial inverter modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant temperature performance.
Supply support for TMS320F28051PNT 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 specializing in analog, embedded processing, and digital signal processing technologies with leadership in industrial, automotive, and power electronics markets.
The TMS320F2805x product line delivers entry-performance real-time control MCUs optimized for cost-sensitive motor control and digital power applications, integrating C28x CPU, CLA, and advanced analog peripherals in compact LQFP packages.
FAQ
What is the maximum operating frequency and instruction cycle time of the TMS320F28051PNT?
The TMS320F28051PNT operates at a maximum CPU frequency of 60 MHz, delivering a 16.67-ns instruction cycle time. This timing is guaranteed across the full industrial temperature range (–40°C to 125°C) and supports deterministic real-time loop execution for motor control applications requiring sub-microsecond interrupt latency and fast PWM update rates.
Does the TMS320F28051PNT include a programmable gain amplifier (PGA) and how many are available?
Yes, the TMS320F28051PNT includes three programmable gain amplifiers (PGAs) with discrete gain settings of approximately 3, 6, or 11. These PGAs are part of the analog front end and are specifically assigned to ADC input channels - enabling direct amplification of low-level sensor signals before digitization without external op-amp circuitry.
What analog-to-digital converter (ADC) specifications does the TMS320F28051PNT provide?
The TMS320F28051PNT features a 12-bit ADC with 2-MSPS sampling rate and 500-ns conversion time. It supports 16 input channels split across two groups (A and B), includes dual sample-and-hold, ratio-metric reference operation (VREFHI/VREFLO), and integrates a temperature sensor for oscillator compensation - all accessible within the same device package.
How is security implemented on the TMS320F28051PNT and what protection does it offer?
The TMS320F28051PNT implements dual-zone security with 128-bit encryption key locking, protecting on-chip Flash, SARAM, OTP, and Secure ROM. This prevents unauthorized readout or firmware reverse-engineering and enforces secure boot by isolating bootloader code (Zone 1) from application code (Zone 2), ensuring integrity of critical control firmware.
What is the package type and pin count of the TMS320F28051PNT, and are there any special layout considerations?
The TMS320F28051PNT uses an 80-pin Low-Profile Quad Flatpack (LQFP) package measuring 12.0 mm × 12.0 mm with 0.5-mm pitch. Layout requires strict separation of analog/digital grounds (VSSA, VSS, M1GND, M2GND, PFCGND), local decoupling (2.2-μF on VDDA, 1.2-μF on each VDD), and avoidance of routing high-speed signals near analog inputs to maintain ADC accuracy and comparator stability.
TMS320F28051PNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 80-LQFP
- Series:
- C2000™ C28x Piccolo™
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- C28x
- Core Size:
- 32-Bit Single-Core
- Speed:
- 60MHz
- Connectivity:
- CANbus, I2C, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 42
- Program Memory Size:
- 64KB (32K x 16)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 16
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 1.995V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
TMS320F28051PNT FAQ
1.How can I place an order for TMS320F28051PNT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMS320F28051PNT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMS320F28051PNT reliable?
The price and inventory of TMS320F28051PNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMS320F28051PNT is usually 5 days.
3.What payment methods are accepted for TMS320F28051PNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMS320F28051PNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMS320F28051PNT?
TMS320F28051PNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMS320F28051PNT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMS320F28051PNT?
For technical support, including TMS320F28051PNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMS320F28051PNT requirements.
6.How does Aetrix verify that TMS320F28051PNT is sourced from the original manufacturer or authorized distributors?
All TMS320F28051PNT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMS320F28051PNT meets industry standards.
7.What is the process for return or replacement of TMS320F28051PNT?
All TMS320F28051PNT units undergo pre-shipment inspection (PSI). If there is an issue with TMS320F28051PNT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMS320F28051PNT part is unused and in its original packaging.
Return procedure for TMS320F28051PNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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