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Texas Instruments LM3S1850-IBZ50-A2
- Part No.:
- LM3S1850-IBZ50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S1850-IBZ50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1850-IBZ50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller in 48-pin LQFP package, operating at 50 MHz with 256 KB Flash and 96 KB SRAM. It integrates dual 10-bit ADCs (8-channel, 1 Msps), 3 UARTs, 2 SSI/SPI, 3 CAN controllers, USB Full-Speed Host/Device/OTG, and 10/100 Ethernet MAC+PHY with IEEE 1588 support - deployed in industrial motion control and networked building automation systems.
For engineers reviewing the LM3S1850-IBZ50-A2 datasheet, LM3S1850-IBZ50-A2 pinout, LM3S1850-IBZ50-A2 application, or LM3S1850-IBZ50-A2 equivalent, key selection criteria include its integrated Ethernet PHY, deterministic 12-cycle interrupt latency, 5V-tolerant GPIOs, hardware quadrature encoder inputs, and ROM-based Stellaris Peripheral Driver Library for production-ready firmware development.
Technical Context
The LM3S1850-IBZ50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, delivering 1.25 DMIPS/MHz and deterministic 12-cycle interrupt response (6 cycles with tail-chaining). Its system architecture includes a 32-channel DMA controller, NVIC, and SWD/JTAG debug interface.
On-chip peripherals include a precision oscillator, two watchdog timers, hibernate module with battery-backed RTC, analog comparators, and motion-control hardware featuring 2 quadrature encoder inputs, 8 PWM outputs, and dead-band generator - all accessible via 5V-tolerant GPIOs with programmable drive strength and slew rate control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3, 50 MHz - enables real-time deterministic control with 1.25 DMIPS/MHz efficiency |
| Memory | 256 KB Flash + 96 KB SRAM - supports complex protocol stacks and local data buffering without external memory |
| ADC | 2 × 10-bit, 8-channel, 1 Msps - allows simultaneous sampling of multiple analog sensors in motor control loops |
| Ethernet | Integrated 10/100 MAC + PHY with IEEE 1588 - eliminates external PHY component and enables time-synchronized industrial networking |
| USB | Full-Speed Host/Device/OTG - permits direct connection to HID peripherals, mass storage, or field-programmable interfaces |
| CAN | 3 independent CAN controllers - supports multi-node vehicle or factory automation networks with redundancy |
| GPIO | Up to 48 5V-tolerant pins with interrupt capability - simplifies interfacing with legacy 5V logic and industrial I/O without level shifters |
Pinout & Package
Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply rails | Dedicated analog/digital/core supplies enable noise-isolated ADC operation and stable CPU voltage regulation |
| GND, GNDA, GNDC | Ground reference planes | Separate analog/digital/core grounds reduce coupling noise and improve signal integrity for mixed-signal operation |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE4 | General-purpose I/O | All 5V-tolerant with configurable pull-up/down, slew rate, and drive strength - suitable for direct connection to industrial sensors and actuators |
| USB0VBUS, USB0ID, USB0DP, USB0DM | USB transceiver interface | Full-speed differential pair with integrated termination and VBUS detection - enables self-powered or bus-powered USB device/host operation |
| EMAC0RXD0–EMAC0RXD3, EMAC0TXD0–EMAC0TXD3, EMAC0RXER, EMAC0TXEN, EMAC0CRS, EMAC0COL | Ethernet MAC signals | Direct MII interface to internal PHY - no external PHY required; supports IEEE 1588 timestamping on RX/TX paths |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | Synchronous serial interface | Hardware SPI master/slave with programmable clock phase/polarity - used for flash programming, sensor communication, or display control |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based Stellaris Peripheral Driver Library | Reduces flash footprint by hosting drivers in read-only memory - frees full 256 KB Flash for application code and enables faster startup |
| Integrated 10/100 Ethernet PHY | Eliminates external PHY IC and associated magnetics - reduces BOM cost and PCB area while enabling IEEE 1588 time synchronization |
| Hardware Motion Control Block | Includes quadrature encoder inputs, dead-band generator, and 8 PWM outputs - offloads timing-critical motor commutation from CPU |
| 5V-Tolerant GPIOs with Interrupt Capability | Supports direct interfacing to industrial 5V logic and sensors without external level shifters - each pin can trigger wake-from-hibernate |
| Battery-Backed Hibernate Module | Maintains RTC and 256 bytes of hibernation RAM during power loss - enables low-power monitoring in energy-constrained building control nodes |
Applications
| Industrial Motion Control | Smart Building Automation |
|---|---|
Use Scenario: Closed-loop servo control of HVAC dampers and variable-frequency drives using position feedback and current sensing. IC Role / Device Role / Timing Role: Real-time MCU executing PID loops, managing CAN-based actuator commands, and synchronizing motion profiles via hardware PWM and QEI. Use Value: Deterministic 12-cycle interrupt latency ensures sub-10 µs jitter in PWM generation, critical for smooth torque delivery in brushless DC motors. | Use Scenario: Distributed environmental monitoring node aggregating temperature, humidity, and occupancy data across Ethernet/IP networks. IC Role / Device Role / Timing Role: Networked edge controller running Modbus TCP and BACnet/IP stacks while managing local sensor fusion and alarm logic. Use Value: Integrated 10/100 Ethernet MAC+PHY with IEEE 1588 support enables precise time-stamping of sensor events within ±1 µs for synchronized multi-node data acquisition. |
| Factory Automation Gateway | Medical Instrumentation Interface |
Use Scenario: Protocol translation bridge between legacy RS-485 fieldbus devices and modern Ethernet-based SCADA systems. IC Role / Device Role / Timing Role: Dual-interface gateway handling concurrent CAN, UART, and Ethernet traffic with hardware-accelerated packet filtering and buffering. Use Value: Three independent CAN controllers allow parallel connection to multiple machine tool networks, while USB OTG supports field technician configuration via portable host devices. | Use Scenario: Portable diagnostic device acquiring ECG waveforms and driving OLED display with touch navigation. IC Role / Device Role / Timing Role: Mixed-signal controller performing analog front-end conditioning, real-time waveform analysis, and graphical UI rendering. Use Value: Dual 10-bit ADCs sampling at 1 Msps provide sufficient resolution and speed for 12-lead ECG acquisition, while ROM-based driver library accelerates FDA-compliant firmware validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IQC50-A2 | Same core, 256 KB Flash, 64 KB SRAM, identical peripheral set but in 100-pin LQFP - adds 4 additional GPIOs and second Ethernet MAC channel | Preferred for designs requiring >48 I/O or dual Ethernet ports (e.g., redundant network switches) | Select when board layout accommodates larger package and extra I/O/Ethernet bandwidth is needed |
| LM3S8962-IQC50-A2 | Same 48-pin LQFP package, 256 KB Flash, 96 KB SRAM, but lacks integrated Ethernet PHY - requires external PHY and magnetics | Suitable for cost-sensitive applications where Ethernet is optional or implemented via external PHY | Choose when BOM cost reduction outweighs integration benefit and external PHY is already in design |
Compared with LM3S1850-IBZ50-A2, LM3S1968-IQC50-A2 offers expanded I/O and dual Ethernet at the cost of larger footprint, while LM3S8962-IQC50-A2 trades integrated PHY for lower unit cost and flexibility in PHY selection - neither is pin-compatible, but all three share identical firmware ABI and StellarisWare driver compatibility.
Availability
LM3S1850-IBZ50-A2 is available at Aetrix Electronics and suitable for industrial motion control, smart building automation, and factory automation gateway applications requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1850-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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM3S1850-IBZ50-A2 belongs to the Stellaris family - TI's first-generation ARM Cortex-M3 MCUs designed specifically for real-time industrial control, motion systems, and networked embedded applications with integrated analog and communication peripherals.
FAQ
What is the maximum operating frequency of the LM3S1850-IBZ50-A2?
The LM3S1850-IBZ50-A2 operates at a maximum frequency of 50 MHz. This speed is achieved using the on-chip precision oscillator or an external crystal, and it delivers 1.25 DMIPS/MHz performance. The Cortex-M3 core maintains deterministic interrupt latency (12 cycles) even at full speed, making LM3S1850-IBZ50-A2 suitable for hard real-time control tasks such as motor commutation and Ethernet packet processing.
Does the LM3S1850-IBZ50-A2 include an integrated Ethernet PHY?
Yes, the LM3S1850-IBZ50-A2 integrates a full 10/100 Ethernet MAC and PHY in a single die. This eliminates the need for an external PHY IC and associated magnetics, reducing BOM cost and PCB area. The integrated PHY supports IEEE 1588 Precision Time Protocol for time-synchronized industrial networking - a key differentiator versus MCUs requiring external PHY components like the LM3S8962-IBZ50-A2.
What development software is supported for the LM3S1850-IBZ50-A2?
The LM3S1850-IBZ50-A2 is fully supported by TI's royalty-free StellarisWare software suite, including the Stellaris Peripheral Driver Library (hosted in ROM), Stellaris USB Library, and Stellaris Graphics Library. It compiles with ARM/Keil, IAR, Code Red, Code Sourcery, and GNU toolchains. All example projects, quickstart applications, and driver source code are provided - enabling rapid prototyping and production firmware development without licensing fees.
Is the LM3S1850-IBZ50-A2 pin-compatible with other Stellaris MCUs in 48-pin LQFP?
No, the LM3S1850-IBZ50-A2 is not universally pin-compatible with all 48-pin LQFP Stellaris MCUs. While it shares the same package outline and power/ground pin locations, peripheral pin mappings (e.g., Ethernet, USB, CAN) differ across variants. For example, LM3S8962-IBZ50-A2 reassigns several EMAC pins to GPIO functions. Always verify pinout against the official LM3S1850 datasheet before PCB layout.
What is the purpose of the ROM-based Stellaris Peripheral Driver Library in the LM3S1850-IBZ50-A2?
The ROM-based Stellaris Peripheral Driver Library in the LM3S1850-IBZ50-A2 hosts pre-validated, production-ready drivers for all on-chip peripherals - including Ethernet, USB, CAN, ADC, and PWM - in read-only memory. This preserves the full 256 KB Flash for application code, accelerates boot time, and simplifies certification by decoupling driver updates from firmware versioning. Developers retain full source access for adaptation, but default execution occurs from ROM for reliability and space efficiency.
LM3S1850-IBZ50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- 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:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 56
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1850-IBZ50-A2 FAQ
1.How can I place an order for LM3S1850-IBZ50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1850-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 LM3S1850-IBZ50-A2 reliable?
The price and inventory of LM3S1850-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 LM3S1850-IBZ50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1850-IBZ50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1850-IBZ50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1850-IBZ50-A2?
LM3S1850-IBZ50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1850-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 LM3S1850-IBZ50-A2?
For technical support, including LM3S1850-IBZ50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1850-IBZ50-A2 requirements.
6.How does Aetrix verify that LM3S1850-IBZ50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1850-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 LM3S1850-IBZ50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1850-IBZ50-A2?
All LM3S1850-IBZ50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1850-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 LM3S1850-IBZ50-A2 part is unused and in its original packaging.
Return procedure for LM3S1850-IBZ50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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