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Texas Instruments LM3S2948-IBZ50-A2
- Part No.:
- LM3S2948-IBZ50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S2948-IBZ50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S2948-IBZ50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, 12-bit ADC (8-channel), and dual UARTs. It operates at 50 MHz, supports hibernation mode with RTC and battery-backed memory, and targets industrial motor control and embedded automation systems.
For engineers reviewing the LM3S2948-IBZ50-A2 datasheet, LM3S2948-IBZ50-A2 pinout, LM3S2948-IBZ50-A2 application, or LM3S2948-IBZ50-A2 equivalent, key selection criteria include its 50 MHz CPU clock, CAN interface compliance, hibernation power management, and QFP-100 package compatibility for space-constrained industrial PCBs.
Technical Context
The LM3S2948-IBZ50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic real-time interrupt handling and memory protection. Its peripheral set includes two UARTs with IrDA/SIR support, one I²C master/slave, one SSI, and a dedicated CAN 2.0A/B controller with 32 message objects and programmable FIFO buffering.
On-chip analog subsystem comprises an 8-channel, 12-bit ADC with hardware averaging and internal temperature sensor; digital I/O includes 68 GPIOs with configurable slew rate, pull-up/down, and edge-triggered interrupts. Clock system integrates PLL, precision oscillator, and hibernation module with external crystal or internal RC source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set and bit-band addressing for atomic peripheral register access |
| Max Clock Speed | 50 MHz - enables deterministic real-time response in motor control loops with ≤20 ns instruction cycle time |
| Flash / SRAM | 256 KB flash (programmable in 1 KB sectors) + 64 KB SRAM - sufficient for bootloader, application code, and real-time data buffers |
| CAN Interface | CAN 2.0A/B compliant controller with 32 message objects, programmable FIFO, and automatic retransmission - supports industrial fieldbus communication without external transceiver logic |
| ADC | 12-bit SAR ADC with 8 input channels, 1 MSPS sampling rate, and hardware averaging up to 64 samples - suitable for precision current/voltage sensing in motor drives |
| Hibernation Mode | Sub-μA deep-sleep state with RTC, battery-backed RAM (2 KB), and wake-on-external-pin or RTC-match - extends battery life in remote monitoring nodes |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and provides full peripheral pinout accessibility |
Pinout & Package
LM3S2948-IBZ50-A2 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, JEDEC MS-026AC compliant. Pin functions are defined per TI SPMS060I datasheet Rev I, Section 5.1 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital (3.3 V), analog (3.3 V), and core (1.2 V) rails - require separate decoupling to meet noise immunity specs for ADC and PLL operation |
| GND, GNDA, GNDC | Ground returns | Analog/digital/core ground separation prevents coupling of switching noise into sensitive analog measurements |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7, PH0–PH7, PK0–PK7 | GPIO banks | 68 total GPIOs with individual direction, open-drain, pull-up/down, and interrupt enable controls - support encoder inputs, PWM outputs, and status signaling |
| PA0–PA7, PB0–PB7 | UART0/1, SSI0/1, I²C0, CAN0 | Multiplexed peripheral signals - e.g., PA0/PA1 = UART0 Rx/Tx; PB4/PB5 = CAN0 Rx/Tx; requires software-configurable GPIO AFSEL register setup |
| OSC0, OSC1 | Clock input | Accepts 1–25 MHz crystal or external clock - feeds PLL for 50 MHz system clock or directly drives hibernation module RTC |
| HIB, RTCCLK, HIBRST | Hibernation control | Enable hibernation entry/exit, select RTC clock source (crystal or internal 32 kHz RC), and reset hibernation logic independently of main reset |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0A/B Controller | Eliminates need for external CAN transceiver interface logic; supports bit rates up to 1 Mbps and automatic error confinement per ISO 11898-1 |
| Hibernation Module with RTC | Enables sub-1 μA sleep current with timekeeping and wake-on-event capability - critical for battery-powered industrial sensors |
| Hardware ADC Averaging | Reduces firmware overhead by performing up to 64-sample averaging in hardware - improves SNR for low-level analog signal acquisition |
| Memory Protection Unit (MPU) | Provides runtime enforcement of memory access permissions across flash, SRAM, and peripheral regions - enhances reliability in safety-critical firmware |
| Programmable GPIO Slew Rate | Allows optimization of EMI and signal integrity on high-speed outputs - selectable fast/normal/slow drive strength per pin |
Applications
| Industrial Motor Control | Building Automation Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, ADC sampling of phase currents, and generation of synchronized PWM waveforms via GPTM modules. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware ADC averaging enable <10 μs current loop update - meeting IEC 61800-3 timing requirements. | Use Scenario: Distributed HVAC sensor node collecting temperature, humidity, and CO₂ data while communicating over CAN bus to central controller. IC Role / Device Role / Timing Role: Sensor interface hub with multi-channel ADC, CAN protocol stack host, and hibernation-based duty-cycled operation. Use Value: Sub-μA hibernation current and integrated CAN reduce BOM count and extend battery life to >5 years in wireless sensor deployments. |
| Programmable Logic Controller (PLC) I/O Module | Energy Metering Gateway |
Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, relay driving, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol translation engine between fieldbus (CAN/RS-485) and backplane interface, managing GPIO debounce, watchdog supervision, and nonvolatile configuration storage. Use Value: On-chip 256 KB flash stores dual firmware images and parameter tables; GPIO commit registers prevent spurious output transitions during configuration updates. | Use Scenario: Smart meter concentrator aggregating pulse-count data from multiple mechanical meters via opto-isolated inputs and forwarding via CAN to utility head-end system. IC Role / Device Role / Timing Role: Pulse capture and timestamping unit with RTC-synchronized event logging, CAN message framing, and secure flash-based firmware update handling. Use Value: Hardware RTC match interrupts and 32-message-object CAN FIFO ensure accurate time-stamped meter readings without CPU polling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor device with same Cortex-M4F core, higher clock (80 MHz), enhanced CAN FD support, and larger 256 KB SRAM | Requires updated BSP and toolchain; supports floating-point math and advanced filtering not available on LM3S2948 | Select when migrating legacy Stellaris designs to extended performance or CAN FD capability |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but lacks native CAN 2.0B and hibernation module with battery-backed RAM | Requires external CAN transceiver and RTC chip for equivalent functionality; lower cost in high-volume consumer applications | Select when CAN is optional and cost sensitivity outweighs integration benefits |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S2948-IBZ50-A2 delivers unique value in legacy industrial systems requiring proven CAN 2.0B integration, ultra-low-power hibernation with RTC, and drop-in compatibility with existing StellarisWare firmware - without requiring architectural migration or external component additions.
Availability
LM3S2948-IBZ50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation nodes, PLC I/O modules, and energy metering gateways requiring stable component supply and long-term lifecycle support.
Supply support for LM3S2948-IBZ50-A2 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 decades of industrial-grade product validation and automotive qualification experience.
The Stellaris LM3S family was designed specifically for deterministic real-time embedded control in harsh environments - integrating CAN, hibernation, and robust analog peripherals to reduce system-level BOM and improve reliability in factory automation and infrastructure equipment.
FAQ
What is the maximum operating frequency of the LM3S2948-IBZ50-A2?
The LM3S2948-IBZ50-A2 operates at a maximum system clock frequency of 50 MHz, achieved via its integrated PLL that multiplies the input crystal or external clock source. This frequency is fully supported across all peripherals including CAN, ADC, and timers, and is validated under industrial temperature range (–40°C to +85°C) per TI SPMS060I datasheet Section 6.1.
Does the LM3S2948-IBZ50-A2 include a hardware CAN controller?
Yes, the LM3S2948-IBZ50-A2 integrates a fully compliant CAN 2.0A/B controller with 32 message objects, programmable FIFO, automatic retransmission, and error confinement. It supports bit rates up to 1 Mbps and requires only an external CAN transceiver (e.g., SN65HVD230) for physical layer connection - no additional protocol logic is needed.
What power modes does the LM3S2948-IBZ50-A2 support?
The LM3S2948-IBZ50-A2 supports five power modes: Run, Sleep, Deep-Sleep, Hibernate, and Shutdown. Hibernate mode draws less than 1 μA with RTC running and 2 KB of battery-backed SRAM retained. Entry and exit are controlled via the Hibernation Module registers (HIBCTL, HIBRTCLD) as documented in Section 6 of the SPMS060I datasheet.
How many ADC channels does the LM3S2948-IBZ50-A2 provide, and what is its resolution?
The LM3S2948-IBZ50-A2 features a single 12-bit successive-approximation ADC with eight analog input channels (AIN0–AIN7). It achieves up to 1 MSPS sampling rate and supports hardware sample averaging across 2–64 conversions per sequence - improving effective resolution and reducing noise in precision current/voltage measurement applications.
Is the LM3S2948-IBZ50-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S2948-IBZ50-A2 is not pin-compatible with other LM3S devices due to its unique peripheral mapping and 100-pin LQFP footprint. For example, LM3S8962 uses 64-pin QFP and lacks CAN; LM3S9B92 uses 108-pin TQFP with different GPIO and peripheral assignments. Migration requires PCB layout revision and firmware adaptation.
LM3S2948-IBZ50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2948-IBZ50-A2 FAQ
1.How can I place an order for LM3S2948-IBZ50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2948-IBZ50-A2 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 LM3S2948-IBZ50-A2 reliable?
The price and inventory of LM3S2948-IBZ50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2948-IBZ50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2948-IBZ50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2948-IBZ50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2948-IBZ50-A2?
LM3S2948-IBZ50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2948-IBZ50-A2 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 LM3S2948-IBZ50-A2?
For technical support, including LM3S2948-IBZ50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2948-IBZ50-A2 requirements.
6.How does Aetrix verify that LM3S2948-IBZ50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2948-IBZ50-A2 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 LM3S2948-IBZ50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2948-IBZ50-A2?
All LM3S2948-IBZ50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2948-IBZ50-A2, 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 LM3S2948-IBZ50-A2 part is unused and in its original packaging.
Return procedure for LM3S2948-IBZ50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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