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Texas Instruments LM3S811-IGZ50-C2
- Part No.:
- LM3S811-IGZ50-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
LM3S811-IGZ50-C2.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
LM3S811-IGZ50-C2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 64 KB flash, 8 KB SRAM, integrated ADC (10-bit, 8-channel), UART, I²C, SSI, PWM, and analog comparator-designed for real-time industrial control in compact embedded systems such as motor drive supervision and sensor node firmware.
For engineers reviewing the LM3S811-IGZ50-C2 datasheet, LM3S811-IGZ50-C2 pinout, LM3S811-IGZ50-C2 application, or LM3S811-IGZ50-C2 equivalent, key selection criteria include its 50 MHz operation, QFP-48 package, -40°C to +85°C industrial temperature grade, and lack of Ethernet/USB peripherals compared to higher-tier Stellaris variants.
Technical Context
The LM3S811-IGZ50-C2 implements the ARMv7-M architecture with NVIC-based interrupt handling, SysTick timer, and MPU for memory protection-enabling deterministic real-time response. It supports Thumb-2 instruction set, 3-stage pipeline, and hardware divide instructions.
Peripherals are clock-gated via the system control block and mapped into APB bus space; ADC sampling uses sequencer-driven hardware averaging up to 64 samples, while PWM modules support dead-band generation and fault shutdown-critical for motor control safety compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation-enables deterministic interrupt latency & efficient C code execution for control loops. |
| Flash Memory | 64 KB on-chip flash with 128-bit wide interface-sufficient for bootloader + application firmware with field-upgrade capability. |
| SRAM | 8 KB on-chip SRAM-supports real-time stack, peripheral buffers, and small data logging without external memory. |
| ADC | 10-bit SAR ADC, 8 channels, 1 MSPS sample rate-meets resolution/speed requirements for voltage/current sensing in power electronics. |
| Timers | Two 32-bit or four 16-bit general-purpose timers + watchdog-provides flexible timing for PWM generation, pulse counting, and system supervision. |
| Communication | 2× UART, 1× I²C, 1× SSI-supports serial telemetry, sensor interfacing, and SPI-compatible displays or ADCs. |
| Operating Temp | -40°C to +85°C-qualified for industrial environments including factory automation and outdoor metering. |
Pinout & Package
LM3S811-IGZ50-C2 is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS150J datasheet Rev J, Table 17.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated domains for digital core, analog, and clock circuitry-require separate decoupling to meet noise immunity specs. |
| GND, GNDA, GNDC | Ground returns | Isolated ground paths prevent analog reference contamination and clock jitter from digital switching noise. |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO pins with alternate functions | Configurable as UART/I²C/SSI signals or direct I/O-enables flexible board routing and peripheral sharing. |
| PA0–PA7, PB0–PB7 | Analog input / timer capture / PWM output | Shared pins support simultaneous ADC sampling and PWM-triggered acquisition-essential for closed-loop motor control timing. |
| nRST | Active-low reset input | Asynchronous reset with internal pull-up-requires external RC network for power-on reset timing compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Comparator | Two independent comparators with programmable reference-enables overvoltage/undervoltage detection without external components. |
| Hardware-Averaged ADC | Up to 64-sample hardware averaging per conversion-reduces software filtering overhead and improves SNR in noisy industrial settings. |
| PWM Dead-Band Generator | Programmable delay between complementary outputs-prevents shoot-through in H-bridge drivers without external logic. |
| Nested Vectored Interrupt Controller | 8 priority levels, 32 interrupt sources-guarantees sub-1 µs latency for critical events like fault shutdown or encoder zero-crossing. |
| Memory Protection Unit (MPU) | 8-region configurable MPU-enforces privilege separation between bootloader and application code for functional safety compliance. |
Applications
| Motor Drive Supervision | Sensor Node Firmware |
|---|---|
Use Scenario: Real-time monitoring of DC motor current, temperature, and position feedback in HVAC blower systems. IC Role / Device Role / Timing Role: Central controller executing PID loop at 10 kHz, triggering ADC conversions synchronized to PWM edges. Use Value: Integrated PWM dead-band and hardware-averaged ADC eliminate external signal conditioning, reducing BOM count and layout area. | Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and light data for wireless transmission every 30 seconds. IC Role / Device Role / Timing Role: Low-power coordinator managing sleep/wake cycles, sensor polling, and UART-to-RF bridge protocol translation. Use Value: 8 KB SRAM retains calibration data across deep-sleep modes; 50 MHz CPU enables fast wake-from-sleep (<10 µs) and rapid sensor initialization. |
| Industrial PLC I/O Module | Power Supply Monitoring |
Use Scenario: DIN-rail mounted module digitizing 4–20 mA analog inputs and driving relay outputs in factory control cabinets. IC Role / Device Role / Timing Role: Isolated analog front-end interface with GPIO-controlled optocoupler drivers and watchdog supervision. Use Value: Dual UARTs support Modbus RTU master/slave operation; internal temperature sensor validates ambient operating conditions. | Use Scenario: Monitoring rail voltages and fan tachometer signals in telecom rectifier units to trigger graceful shutdown on overtemperature. IC Role / Device Role / Timing Role: Standalone supervisor detecting out-of-spec conditions and asserting hardware reset or alert lines. Use Value: Analog comparators with internal reference provide autonomous voltage threshold detection without external resistive dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IGZ50-C2 | 128 KB flash, 32 KB SRAM, added Ethernet MAC + PHY, USB OTG-larger footprint (100-pin LQFP). | Supports networked control and host/device USB connectivity-unsuitable where size/cost constraints prohibit extra peripherals. | Select when Ethernet or USB device functionality is required; not drop-in compatible due to pin count and peripheral mapping differences. |
| TM4C123GH6PM | Same Cortex-M4F core, 256 KB flash, 32 KB SRAM, FPU, enhanced PWM and ADC features-requires PCB redesign (64-pin LQFP). | Enables floating-point math for advanced motor algorithms and higher-resolution ADC sampling-ideal for next-generation designs requiring scalability. | Choose for migration path with FPU and larger memory; requires firmware adaptation and new layout-no pin compatibility with LM3S811-IGZ50-C2. |
Compared with LM3S811-IGZ50-C2, LM3S1968-IGZ50-C2 adds Ethernet but increases cost and board area, while TM4C123GH6PM delivers computational headroom and precision at the expense of legacy code portability and layout reuse.
Availability
LM3S811-IGZ50-C2 is available at Aetrix Electronics and suitable for industrial motor control, sensor node deployment, and power supply supervision requiring stable component supply and long-term lifecycle support.
Supply support for LM3S811-IGZ50-C2 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The Stellaris LM3S series was designed as an entry-level ARM Cortex-M3 platform for cost-sensitive, real-time embedded applications-prioritizing peripheral integration, low-power operation, and ease of firmware development over high-speed compute or connectivity expansion.
FAQ
What is the maximum operating frequency of the LM3S811-IGZ50-C2?
The LM3S811-IGZ50-C2 operates at a maximum system clock frequency of 50 MHz, derived from an internal PLL that multiplies the 4–25 MHz crystal or external clock input. This frequency is specified across the full industrial temperature range (-40°C to +85°C) and supports deterministic real-time execution for control applications.
Does the LM3S811-IGZ50-C2 include a hardware floating-point unit?
No, the LM3S811-IGZ50-C2 does not include a hardware floating-point unit. It implements the ARM Cortex-M3 core, which supports only integer and fixed-point arithmetic. Floating-point operations must be performed in software using CMSIS-DSP libraries or compiler-generated routines-this is confirmed in the TI SPMS150J datasheet Section 1.4.1 and processor documentation.
What debug interface does the LM3S811-IGZ50-C2 support?
The LM3S811-IGZ50-C2 supports JTAG debugging via dedicated TCK, TMS, TDI, TDO, and nTRST pins. It does not support SWD (Serial Wire Debug). The JTAG interface enables full boundary-scan, flash programming, and real-time debugging through TI's ICDI or third-party JTAG adapters compatible with ARM CoreSight standards.
Can the LM3S811-IGZ50-C2 operate from a single 3.3 V supply?
Yes, the LM3S811-IGZ50-C2 is designed to operate from a single 3.3 V nominal supply applied to VDD, VDDA, and VDDC pins. Internal regulators generate required lower voltages; however, separate 100 nF decoupling capacitors are mandatory on each supply domain per TI layout guidelines in the SPMS150J datasheet Section 16.
Is the LM3S811-IGZ50-C2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S811-IGZ50-C2 is not pin-compatible with other LM3S family members. Its 48-pin LQFP package and peripheral pin mapping (e.g., ADC inputs on PA0–PA7, UART on PD0/PD1) differ from larger variants like the LM3S1968 (100-pin) or LM3S3748 (64-pin). Pin compatibility is not claimed in any TI documentation for this part.
LM3S811-IGZ50-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Stellaris® ARM® Cortex®-M3S 800
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S811-IGZ50-C2 FAQ
1.How can I place an order for LM3S811-IGZ50-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S811-IGZ50-C2 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 LM3S811-IGZ50-C2 reliable?
The price and inventory of LM3S811-IGZ50-C2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S811-IGZ50-C2 is usually 5 days.
3.What payment methods are accepted for LM3S811-IGZ50-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S811-IGZ50-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S811-IGZ50-C2?
LM3S811-IGZ50-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S811-IGZ50-C2 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 LM3S811-IGZ50-C2?
For technical support, including LM3S811-IGZ50-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S811-IGZ50-C2 requirements.
6.How does Aetrix verify that LM3S811-IGZ50-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S811-IGZ50-C2 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 LM3S811-IGZ50-C2 meets industry standards.
7.What is the process for return or replacement of LM3S811-IGZ50-C2?
All LM3S811-IGZ50-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S811-IGZ50-C2, 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 LM3S811-IGZ50-C2 part is unused and in its original packaging.
Return procedure for LM3S811-IGZ50-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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