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Texas Instruments LM3S1512-IBZ25-A2T
- Part No.:
- LM3S1512-IBZ25-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S1512-IBZ25-A2T.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
LM3S1512-IBZ25-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated ADC (10-bit, 1 MSPS), dual UARTs, I²C, SSI, and QEI peripherals, operating at up to 50 MHz - designed for real-time motor control and industrial sensing applications.
For engineers reviewing the LM3S1512-IBZ25-A2T datasheet, LM3S1512-IBZ25-A2T pinout, LM3S1512-IBZ25-A2T application, or LM3S1512-IBZ25-A2T equivalent, key selection criteria include its hibernation module with RTC and battery-backed memory, 8-channel 10-bit ADC with hardware averaging, and dedicated quadrature encoder interface for position feedback in closed-loop systems.
Technical Context
The LM3S1512-IBZ25-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC supporting 48 configurable interrupts, and SysTick timer. It integrates a hibernation module with RTC, battery-backed RAM, and wake-up capability via external pins or RTC match.
Peripherals include two UARTs (one with IrDA/SIR support), one I²C master/slave, one SSI controller, eight GPIO ports with programmable slew rate and pull-up/down, and a 16-channel analog comparator with reference voltage generator - all clocked from a single PLL-based system clock tree with multiple dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instructions and deterministic interrupt latency |
| Max Clock Speed | 50 MHz - enables real-time execution of motor control loops with ≤20 µs cycle time |
| Flash Memory | 256 KB - sufficient for bootloader + application firmware with field-upgrade partitioning |
| SRAM | 32 KB - supports stack/heap for RTOS use and ADC data buffering |
| ADC | 10-bit, 1 MSPS, 8-channel, with hardware sample averaging - suitable for precision current/voltage sensing |
| Hibernation Module | RTC + 2 KB battery-backed SRAM + wake-on-RTC-match or external pin - enables ultra-low-power monitoring modes |
| QEI Interface | Dedicated quadrature encoder input with direction, velocity, and index pulse capture - eliminates CPU overhead in position tracking |
Pinout & Package
LM3S1512-IBZ25-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per TI SPMS018I datasheet Rev I, Section 5.1 and Figure 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital, analog, and core domains enable noise isolation for ADC accuracy |
| GND, GNDA, GNDC | Ground returns | Dedicated analog ground prevents coupling of digital switching noise into sensitive measurements |
| PF0–PF7 | GPIO Port F | Configurable as QEI inputs (PHASE0/PHASE1/INDEX), UART0, or SSI0 - supports direct encoder interfacing without external logic |
| PD0–PD7 | GPIO Port D | Supports UART1, I²C0, and ADC0 channel inputs - enables multi-protocol peripheral coexistence |
| HIB, RTCCLK, HIBRST | Hibernation control | Enable deep-sleep entry, RTC clock source selection, and hibernate reset assertion - critical for battery-powered operation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hibernation Module | Reduces active current to 1.7 µA in hibernate mode while retaining RTC and 2 KB SRAM state |
| Dual UART with IrDA/SIR | Enables robust serial communication over noisy industrial lines and infrared remote diagnostics |
| Hardware ADC Averaging | Up to 64-sample hardware averaging improves effective resolution to ~12 bits without CPU intervention |
| Quadrature Encoder Interface (QEI) | Directly processes A/B/Z encoder signals with automatic direction detection and position accumulation - offloads timing-critical tasks from CPU |
| Memory Protection Unit (MPU) | Enforces privilege-level access control across flash, SRAM, and peripheral regions - supports safe multitasking in RTOS environments |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor drive with Hall-effect or encoder feedback in factory automation. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation, and position decoding via QEI. Use Value: Deterministic 50 MHz Cortex-M3 execution and dedicated QEI eliminate jitter in commutation timing, improving torque ripple <5%. | Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and vibration. IC Role / Device Role / Timing Role: Low-power sensor hub aggregating ADC, I²C sensor data, and RTC-timed wake-up. Use Value: Hibernate mode draws only 1.7 µA while preserving RTC and 2 KB context - extends 2-AA battery life to >5 years. |
| Programmable Logic Controller (PLC) I/O Module | Medical Diagnostic Equipment |
Use Scenario: DIN-rail mounted I/O expansion module with isolated digital inputs and analog current loop outputs. IC Role / Device Role / Timing Role: High-integrity data acquisition and protocol translation between Modbus RTU (UART) and local sensors. Use Value: Dual UARTs with hardware FIFOs and error detection ensure reliable 9600–115200 bps Modbus communication under EMI stress. | Use Scenario: Portable ultrasound front-end requiring precise analog signal conditioning and timing-critical beamforming control. IC Role / Device Role / Timing Role: Synchronized ADC sampling, real-time FIR filtering, and SPI-driven DAC control. Use Value: 10-bit ADC with 1 MSPS and hardware averaging delivers SNR >62 dB for low-noise echo signal digitization. |
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 part with 80 MHz Cortex-M4F core, FPU, 256 KB flash, 32 KB SRAM, same pinout but enhanced peripherals | Requires firmware update for FPU usage; supports higher-performance control algorithms and floating-point math | Recommended for new designs needing higher compute throughput or DSP capability |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, no hibernation module or QEI; different pinout and peripheral mapping | Lacks integrated RTC+hibernation and dedicated QEI - requires external components for encoder or ultra-low-power operation | Suitable where cost sensitivity outweighs need for hibernation or encoder interface |
Compared with LM3S1512-IBZ25-A2T, TM4C123GH6PM offers higher clock speed and FPU for advanced control, while STM32F103VET6 provides more memory but lacks hibernation and QEI - making LM3S1512-IBZ25-A2T uniquely suited for encoder-based, battery-aware industrial edge nodes.
Availability
LM3S1512-IBZ25-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1512-IBZ25-A2T 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies since 1930.
The Stellaris LM3S series was TI's first ARM-based MCU family, engineered specifically for deterministic real-time control in resource-constrained industrial and automotive applications - emphasizing low-latency interrupt response, integrated analog interfaces, and power-efficient hibernation.
FAQ
What is the maximum operating frequency of the LM3S1512-IBZ25-A2T?
The LM3S1512-IBZ25-A2T operates at a maximum system clock frequency of 50 MHz, derived from an internal PLL that accepts a 1–25 MHz crystal or external clock source. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and supports deterministic execution of real-time control tasks such as motor commutation and PID loops with sub-20 µs latency.
Does the LM3S1512-IBZ25-A2T include a hardware quadrature encoder interface?
Yes, the LM3S1512-IBZ25-A2T integrates a dedicated Quadrature Encoder Interface (QEI) peripheral that directly accepts PHASE0, PHASE1, and INDEX signals. It performs automatic direction detection, position counting, and velocity measurement without CPU intervention - confirmed in Section 16 of the SPMS018I datasheet and supported by GPIO Port F pin mapping (PF0–PF2).
What power-saving features does the LM3S1512-IBZ25-A2T offer for battery-powered applications?
The LM3S1512-IBZ25-A2T includes a hibernation module with RTC, 2 KB battery-backed SRAM, and wake-up on RTC match or external pin. In hibernate mode, it draws only 1.7 µA (typical), enabling multi-year operation on coin-cell batteries - detailed in Section 6 of the SPMS018I datasheet and validated in TI Application Report SPRAAL1.
Is the LM3S1512-IBZ25-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S1512-IBZ25-A2T uses a unique 100-pin LQFP package configuration optimized for its peripheral set. While some LM3S family members share the same footprint (e.g., LM3S1968), pin functions differ significantly - particularly for QEI, hibernation, and ADC channels - requiring board-level validation per SPMS018I Section 5.1.
What development tools support the LM3S1512-IBZ25-A2T?
The LM3S1512-IBZ25-A2T is supported by TI's Code Composer Studio v5.x and earlier, Keil MDK-ARM v4.7x, and IAR Embedded Workbench for ARM v6.5x. Debugging uses standard JTAG (TCK/TMS/TDI/TDO/nTRST) per Section 4 of SPMS018I, and TI's Stellaris Peripheral Driver Library provides production-ready drivers for all on-chip peripherals including QEI and hibernation.
LM3S1512-IBZ25-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- 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:
- 25MHz
- Connectivity:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 58
- Program Memory Size:
- 96KB (96K 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 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1512-IBZ25-A2T FAQ
1.How can I place an order for LM3S1512-IBZ25-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1512-IBZ25-A2T 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 LM3S1512-IBZ25-A2T reliable?
The price and inventory of LM3S1512-IBZ25-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1512-IBZ25-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1512-IBZ25-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1512-IBZ25-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1512-IBZ25-A2T?
LM3S1512-IBZ25-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1512-IBZ25-A2T 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 LM3S1512-IBZ25-A2T?
For technical support, including LM3S1512-IBZ25-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1512-IBZ25-A2T requirements.
6.How does Aetrix verify that LM3S1512-IBZ25-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1512-IBZ25-A2T 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 LM3S1512-IBZ25-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1512-IBZ25-A2T?
All LM3S1512-IBZ25-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1512-IBZ25-A2T, 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 LM3S1512-IBZ25-A2T part is unused and in its original packaging.
Return procedure for LM3S1512-IBZ25-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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