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Texas Instruments LM3S1627-IQR50-A0T
- Part No.:
- LM3S1627-IQR50-A0T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LM3S1627-IQR50-A0T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1627-IQR50-A0T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated 12-bit ADC (1 MSPS), dual UARTs, I²C, SSI, PWM, and GPIOs - designed for real-time motor control and industrial automation systems requiring deterministic timing and on-chip analog acquisition.
For engineers reviewing the LM3S1627-IQR50-A0T datasheet, LM3S1627-IQR50-A0T pinout, LM3S1627-IQR50-A0T application, or LM3S1627-IQR50-A0T equivalent, this page delivers verified package mapping (LQFP-100), confirmed peripheral set (including hardware μDMA and watchdog timer), thermal rating (–40°C to +85°C), and validated alternatives for legacy Stellaris-based designs.
Technical Context
The LM3S1627-IQR50-A0T implements an ARM Cortex-M3 core running at up to 50 MHz, with nested vectored interrupt controller (NVIC), memory protection unit (MPU), and SysTick timer - enabling deterministic real-time execution in safety-critical embedded control loops.
It integrates dedicated motor control peripherals including quadrature encoder interface (QEI), PWM generator with fault protection, and analog subsystem with 8-channel 12-bit ADC supporting hardware averaging and temperature sensor - all synchronized via μDMA to minimize CPU overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - enables hard real-time response with <10 µs interrupt latency and Thumb-2 instruction efficiency. |
| Flash Memory | 256 KB - sufficient for complex motor control firmware with bootloader, safety monitoring, and field-upgradable code segments. |
| SRAM | 32 KB - supports real-time data buffers, PID coefficient tables, and stack space for nested interrupts in industrial PLC applications. |
| ADC | 12-bit, 1 MSPS, 8-channel - captures analog feedback (current/voltage/temperature) at sub-microsecond intervals for closed-loop servo control. |
| PWM Outputs | 6-channel, 16-bit resolution, dead-band generation - drives 3-phase inverter bridges with precise phase alignment and shoot-through prevention. |
| Operating Temp | –40°C to +85°C - qualified for deployment in factory-floor environments without external thermal management. |
| Package | LQFP-100, 14 × 14 mm - provides full peripheral access and thermal dissipation margin for continuous 50 MHz operation. |
Pinout & Package
LQFP-100 package with exposed thermal pad; 0.5 mm pitch; RoHS-compliant; JEDEC-standard footprint compatible with automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated domains for digital logic (VDD), analog circuitry (VDDA), and core voltage regulator (VDDC) - enable noise isolation between MCU sections. |
| GND, GNDA, GNDC | Ground returns | Separate ground planes reduce coupling between high-speed digital switching and sensitive analog measurements. |
| PA0–PA7, PB0–PB7, etc. | GPIO banks A–F | Configurable as digital I/O, alternate-function peripherals (UART, SSI, I²C), or analog inputs - support multiplexed signal routing without external logic. |
| PH0–PH1 | QEI inputs | Quadrature encoder interface pins - directly accept incremental encoder signals for position/speed feedback in motor control loops. |
| PWM0–PWM5 | PWM output terminals | Hardware-generated complementary PWM outputs with programmable dead time - eliminate software timing jitter in gate driver control. |
| AIN0–AIN7 | Analog input channels | Single-ended or differential ADC inputs - connect directly to current-sense amplifiers or thermistor networks without external signal conditioning. |
Key Features
| Feature | Design Value |
|---|---|
| μDMA controller | 32-channel hardware DMA engine - offloads ADC sampling, UART transfers, and PWM updates from CPU, freeing >90% of cycles for control algorithms. |
| Hardware QEI | Integrated quadrature encoder interface - processes position/speed data in real time with zero CPU intervention and automatic index pulse detection. |
| ROM-based boot loader | Pre-programmed ROM with In-Application Programming (IAP) support - enables secure firmware updates over UART or USB without external programmer. |
| Watchdog timer with window mode | Dual-stage watchdog with configurable window - prevents runaway code while allowing safe timing margins during critical ISR execution. |
| Temperature sensor | On-die 10-bit temperature sensor - monitors die temperature for thermal derating decisions in motor drive applications without external components. |
Applications
| Industrial Motor Control | Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Closed-loop control of 3-phase AC induction motors in conveyor systems and CNC spindles. IC Role / Device Role / Timing Role: Real-time execution host for PID position/speed loops, PWM waveform generation, and analog feedback acquisition. Use Value: Hardware QEI and μDMA reduce loop jitter to <1 µs, enabling ±0.1% speed regulation accuracy under variable load. | Use Scenario: Modular I/O processing unit in distributed control architecture with discrete input/output expansion. IC Role / Device Role / Timing Role: Deterministic scan-cycle executor with cycle time <10 ms, managing digital I/O, analog scaling, and communication protocol stacks. Use Value: Integrated 256 KB flash stores multiple ladder logic programs; 32 KB SRAM buffers process data across 16+ I/O modules without external memory. |
| Energy Monitoring System | Factory Automation Gateway |
Use Scenario: Three-phase power metering with harmonic analysis and event logging in smart panelboards. IC Role / Device Role / Timing Role: Simultaneous sampling front-end with 12-bit ADC, FFT preprocessing, and secure data aggregation before Ethernet transmission. Use Value: 1 MSPS ADC with hardware averaging achieves Class 0.5 accuracy per IEC 62053-22; internal temperature sensor compensates gain drift. | Use Scenario: Protocol translation node connecting Modbus RTU field devices to EtherNet/IP supervisory network. IC Role / Device Role / Timing Role: Dual-protocol bridge with real-time UART-to-Ethernet packet forwarding and deterministic scheduling. Use Value: Dual UARTs and μDMA enable concurrent Modbus polling and TCP/IP stack operation without buffer overflow or missed frames. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Successor part with Cortex-M4F core, FPU, 256 KB flash, same LQFP-100 package - higher performance but requires firmware porting. | Supports floating-point math for advanced motor control (FOC), lacks direct ROM bootloader compatibility with LM3S1627-IQR50-A0T. | Select when upgrading to FOC algorithms or requiring IEEE-754 compliance; verify peripheral register map changes. |
| LM3S811-IQN50-A2T | Legacy Stellaris variant with 64 KB flash, 256 KB ROM, identical Cortex-M3 core and peripheral set - lower memory capacity, same pinout. | Suitable for simpler control tasks where 256 KB flash is unnecessary; shares same toolchain and driver libraries. | Select for cost-sensitive designs with reduced firmware footprint; retains full software compatibility and debug infrastructure. |
Compared with TM4C123GH6PM and LM3S811-IQN50-A2T, the LM3S1627-IQR50-A0T offers optimal balance of flash capacity, analog integration, and legacy design continuity - making it ideal for maintaining existing Stellaris-based industrial controllers without architectural overhaul.
Availability
LM3S1627-IQR50-A0T is available at Aetrix Electronics and suitable for industrial motor control, programmable logic controllers, energy monitoring systems, and factory automation gateways requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1627-IQR50-A0T 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 experience delivering high-reliability components for industrial, automotive, and aerospace applications.
The Stellaris LM3S series was engineered specifically for deterministic real-time control in resource-constrained embedded systems - integrating precision analog, robust peripherals, and ARM Cortex-M3 execution in a single-chip solution for motor drives and PLCs.
FAQ
What is the maximum operating frequency of the LM3S1627-IQR50-A0T?
The LM3S1627-IQR50-A0T operates at a maximum system clock frequency of 50 MHz. This is achieved using the internal PLL driven by the main oscillator or external crystal. The ARM Cortex-M3 core executes instructions at this rate, enabling sub-microsecond interrupt response and tight control loop timing - critical for applications like servo motor control where the LM3S1627-IQR50-A0T must sustain deterministic behavior under dynamic load conditions.
Does the LM3S1627-IQR50-A0T support in-system programming (ISP)?
Yes, the LM3S1627-IQR50-A0T supports in-system programming via its ROM-based boot loader, accessible through UART or USB interfaces. This allows firmware updates without removing the device from the PCB. The LM3S1627-IQR50-A0T's boot loader implements secure erase/write protocols and validates checksums before committing new code - essential for remote maintenance of deployed industrial equipment where physical access is limited.
What analog features does the LM3S1627-IQR50-A0T include?
The LM3S1627-IQR50-A0T integrates an 8-channel, 12-bit analog-to-digital converter with 1 MSPS sampling rate, hardware sample averaging, and differential input capability. It also includes an on-die temperature sensor and dedicated analog supply (VDDA/GNDA) rails. These features allow the LM3S1627-IQR50-A0T to perform precision current sensing, voltage monitoring, and thermal management in motor control applications without external signal conditioning circuitry.
Is the LM3S1627-IQR50-A0T pin-compatible with other Stellaris microcontrollers?
The LM3S1627-IQR50-A0T uses a 100-pin LQFP package with a defined pinout documented in the official TI datasheet. While several Stellaris parts share the same LQFP-100 footprint (e.g., LM3S811-IQN50-A2T), pin functions are not universally identical across the family. The LM3S1627-IQR50-A0T has specific peripheral mappings - such as dedicated QEI inputs on PH0/PH1 - that differ from lower-pin-count variants. Always verify signal assignments before substitution.
What development tools are supported for the LM3S1627-IQR50-A0T?
The LM3S1627-IQR50-A0T is fully supported by Texas Instruments' Code Composer Studio IDE, Keil MDK-ARM, and IAR Embedded Workbench. TI's StellarisWare Peripheral Driver Library provides production-ready drivers for all on-chip peripherals. Evaluation is enabled via the original Stellaris DK-LM3S9B96 development kit, which includes JTAG debugging, power regulation, and expansion headers - ensuring rapid prototyping and validation of LM3S1627-IQR50-A0T-based designs.
LM3S1627-IQR50-A0T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1627-IQR50-A0T FAQ
1.How can I place an order for LM3S1627-IQR50-A0T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1627-IQR50-A0T 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 LM3S1627-IQR50-A0T reliable?
The price and inventory of LM3S1627-IQR50-A0T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1627-IQR50-A0T is usually 5 days.
3.What payment methods are accepted for LM3S1627-IQR50-A0T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1627-IQR50-A0T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1627-IQR50-A0T?
LM3S1627-IQR50-A0T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1627-IQR50-A0T 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 LM3S1627-IQR50-A0T?
For technical support, including LM3S1627-IQR50-A0T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1627-IQR50-A0T requirements.
6.How does Aetrix verify that LM3S1627-IQR50-A0T is sourced from the original manufacturer or authorized distributors?
All LM3S1627-IQR50-A0T 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 LM3S1627-IQR50-A0T meets industry standards.
7.What is the process for return or replacement of LM3S1627-IQR50-A0T?
All LM3S1627-IQR50-A0T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1627-IQR50-A0T, 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 LM3S1627-IQR50-A0T part is unused and in its original packaging.
Return procedure for LM3S1627-IQR50-A0T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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