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Integrated Mixed-Signal Control for Aviation and Defense Actuation Systems
Microchip Technology introduces the LX4580, a 24-channel integrated circuit designed to streamline data acquisition and motor control for mission-critical aerospace and defense platforms.
www.microchip.com
The LX4580 is a highly integrated mixed-signal integrated circuit (IC) that consolidates sensing, motor control, and data acquisition into a single 144-pin low-profile quad flat package (LQFP). Designed for high-reliability environments, the device serves as a central analog front-end for actuation systems in More Electric Aircraft (MEA), guided defense platforms, heavy-duty drones, and space launch vehicles.
System Consolidation and Technical Integration
Engineered to replace numerous discrete components—including standalone analog-to-digital converters (ADCs), digital-to-analog converters (DACs), driver ICs, and voltage regulators—the LX4580 reduces the physical footprint and wiring complexity of the digital supply chain in avionics. The device integrates 24 channels of mixed-signal functionality, featuring:
- Data Conversion: Dual high-speed Successive Approximation Register (SAR) ADCs and nine dedicated Sigma-Delta (Σ-Δ) ADCs for motor current sensing and waveform acquisition.
- Sensor Interfaces: Support for dual Linear Variable Differential Transformer (LVDT) or resolver interfaces, five independent temperature sensor inputs (Pt100/Pt1000), and three 4–20 mA current loop interfaces for pressure sensing.
- Actuation Control: Eight independent Pulse-Width Modulation (PWM) outputs designed to drive half-bridge stages for brushless DC (BLDC) or stepper motors.
By centralizing these functions, the IC enables precise timing alignment across all sensor inputs and motor outputs, a critical requirement for deterministic performance in flight control surfaces and robotic actuators.
Redundancy and Fault Tolerance Standards
To meet the stringent safety requirements of the automotive data ecosystem and aerospace certifications such as DO-160, the LX4580 incorporates a redundant architecture. This includes Triple Mode Redundancy (TMR) for sequential logic to mitigate Single-Event Upsets (SEUs) and Error Correcting Code (ECC) encoding, which provides 1-bit error correction and 2-bit error detection.
The device is designed to interface with dual microcontrollers (MCUs) or Field-Programmable Gate Arrays (FPGAs) in redundant Command/Monitor (COM/MON) architectures. Integrated fault detection circuitry monitors for floating inputs, short circuits to ground, and over-voltage conditions, ensuring system integrity in mission-critical applications.
Technical Applications and Development
The LX4580 is optimized for linear and rotary actuator control, providing sufficient current sensing for up to four-phase BLDC motors or two-phase bipolar stepper motors. It includes high-side monitoring for total motor supply current to protect against system-level overcurrent events.
Microchip Technology has made the LX4580 available in production quantities. To support engineering integration, the company provides the LX4580-EVB Evaluation Board and technical documentation demonstrating synchronized operation with the SAMV71 microcontroller. These tools allow for the validation of sensor interface accuracy and PWM synthesis before final hardware deployment.
www.microchip.com
Redundancy and Fault Tolerance Standards
To meet the stringent safety requirements of the automotive data ecosystem and aerospace certifications such as DO-160, the LX4580 incorporates a redundant architecture. This includes Triple Mode Redundancy (TMR) for sequential logic to mitigate Single-Event Upsets (SEUs) and Error Correcting Code (ECC) encoding, which provides 1-bit error correction and 2-bit error detection.
The device is designed to interface with dual microcontrollers (MCUs) or Field-Programmable Gate Arrays (FPGAs) in redundant Command/Monitor (COM/MON) architectures. Integrated fault detection circuitry monitors for floating inputs, short circuits to ground, and over-voltage conditions, ensuring system integrity in mission-critical applications.
Technical Applications and Development
The LX4580 is optimized for linear and rotary actuator control, providing sufficient current sensing for up to four-phase BLDC motors or two-phase bipolar stepper motors. It includes high-side monitoring for total motor supply current to protect against system-level overcurrent events.
Microchip Technology has made the LX4580 available in production quantities. To support engineering integration, the company provides the LX4580-EVB Evaluation Board and technical documentation demonstrating synchronized operation with the SAMV71 microcontroller. These tools allow for the validation of sensor interface accuracy and PWM synthesis before final hardware deployment.
www.microchip.com
