Texas Instruments TMS320F2811PBKS

Overview

TMS320F2811PBKS from Texas Instruments is a 150-MHz C28x-based digital signal processor optimized for real-time motor control and power electronics applications. It integrates 128K × 16 flash, 18K × 16 SARAM, dual 12-bit ADCs (16 channels, 80 ns conversion), two Event Managers (EVA/EVB), eCAN, SPI, dual SCIs, McBSP, and 56 GPIO pins in a 128-pin LQFP package rated for –40°C to 125°C operation.

For engineers reviewing the TMS320F2811PBKS datasheet, TMS320F2811PBKS pinout, TMS320F2811PBKS application, or TMS320F2811PBKS equivalent, this page delivers verified technical context, validated pin functions, confirmed memory map, real-time peripheral timing constraints, and precise thermal and voltage operating conditions per TI SPRS174V (Feb 2021).

Technical Context

The TMS320F2811PBKS implements a Harvard-architecture 32-bit C28x CPU with atomic instruction execution, 4M linear address space, and little-endian data organization. Its clock system includes an on-chip oscillator, PLL-based clock module (configurable up to 150 MHz), and programmable low-power modes (IDLE/STANDBY/HALT) with individual peripheral clock gating.

Peripheral integration centers on deterministic real-time control: two Event Managers provide 16 PWM outputs, 6 capture/QEP inputs, and trip-zone protection; the 12-bit ADC supports simultaneous sampling across two 8-channel multiplexers with dedicated sample-and-hold circuits and 12.5 MSPS throughput; eCAN conforms to ISO 11898-1 with 32 message objects and time-stamped receive buffers.

Key Specifications

Pinout & Package

128-pin Low-Profile Quad Flatpack (LQFP), PBK package, 14.0 mm × 14.0 mm body size, 0.4-mm pitch, RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal controller applications.

Compared with TMS320F2812PGF, TMS320F2811PBKS removes XINTF to reduce pin count and cost while retaining identical real-time control peripherals; versus TMS320F28335PGF, it trades floating-point capability and CLA acceleration for lower power, smaller footprint, and proven qualification in automotive powertrain applications.

Availability

TMS320F2811PBKS is available at Aetrix Electronics and suitable for industrial motor drives, electric vehicle powertrain controllers, and grid-tied solar inverters requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 qualified operation from –40°C to 125°C.

Supply support for TMS320F2811PBKS 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 industrial, automotive, and power electronics.

The TMS320F281x series was designed specifically for real-time digital control of power converters and motor drives, emphasizing deterministic interrupt latency, integrated analog front-ends, and robust packaging for harsh environments.

FAQ

What is the maximum operating frequency and core voltage of the TMS320F2811PBKS?

The TMS320F2811PBKS operates at a maximum CPU frequency of 150 MHz with a core supply voltage of 1.9 V. This specification is validated per TI's SPRS174V datasheet (Rev V, Feb 2021) under recommended operating conditions. The device also supports 135 MHz operation at 1.8 V core voltage. Both configurations maintain full functionality of all peripherals including ADC, eCAN, and Event Managers.

Does the TMS320F2811PBKS include an external memory interface (XINTF)?

No, the TMS320F2811PBKS does not include an external memory interface. The XINTF is present only on the TMS320F2812 devices (e.g., PGF and GHH packages). The PBK package variant-used by both TMS320F2810 and TMS320F2811-is explicitly defined in the datasheet as lacking XINTF signals, confirmed by pin diagrams and signal descriptions in Section 7.1 and Table 7-1.

How many ADC channels and what sampling rate does the TMS320F2811PBKS support?

The TMS320F2811PBKS integrates two independent 12-bit ADC modules (ADC A and ADC B), each with eight input channels, for a total of 16 analog inputs. It achieves a minimum conversion time of 80 ns (12.5 MSPS), supporting both single and simultaneous sampling modes. Simultaneous acquisition across both ADCs enables synchronized current/voltage measurement critical for three-phase motor control.

What is the purpose of the 128-bit security key in the TMS320F2811PBKS?

The 128-bit security key in the TMS320F2811PBKS protects on-chip flash memory, OTP ROM, and L0/L1 SARAM blocks from unauthorized read access or firmware extraction. Once enabled, it prevents reverse engineering and cloning of proprietary control algorithms. The security module is implemented in hardware and enforced at boot time and during debug access, as documented in Section 9.5 of the SPRS174V datasheet.

Which communication interfaces are available on the TMS320F2811PBKS?

The TMS320F2811PBKS provides eCAN (ISO 11898-1 compliant), two independent SCIs (UART), SPI, and McBSP. All are fully functional in the PBK package. Notably, it lacks USB, Ethernet, or PCIe interfaces-those appear only in later-generation C2000 devices like the F2837xD series. The eCAN interface supports 32 message objects and hardware timestamping for deterministic networked control.