Texas Instruments

LM8500HLQ9

LM8500HLQ9 Description

The LM8500HLQ9 is a 10-bit touch screen controller from Texas Instruments, designed for applications requiring precise and reliable touch screen interfaces. This IC features a 4-wire resistive touchscreen interface, offering robust performance across a wide operating temperature range of 0°C to 70°C. The LM8500HLQ9 is housed in a surface-mount package, specifically a 44-pin WQFN, making it suitable for compact and space-constrained designs. The device operates on a supply voltage range of 2.7V to 5.5V and draws a supply current of 11.5 mA, ensuring efficient power usage.

LM8500HLQ9 Features

• Touchscreen Interface: The LM8500HLQ9 employs a 4-wire resistive touchscreen interface, which is known for its accuracy and reliability in detecting touch inputs. This interface supports a resolution of 10 bits, providing high precision in touch detection.
• Operating Temperature Range: With an operating temperature range of 0°C to 70°C, the LM8500HLQ9 is suitable for a variety of environments, from standard room temperatures to higher-temperature industrial settings.
• Power Efficiency: The device operates within a supply voltage range of 2.7V to 5.5V and consumes only 11.5 mA of current, making it an energy-efficient choice for battery-powered and low-power applications.
• Communication Interface: The LM8500HLQ9 features a UART interface, facilitating easy communication with microcontrollers and other system components.
• Packaging and Mounting: The device is available in a surface-mount 44-pin WQFN package, which is ideal for automated assembly processes and compact PCB designs.
• Regulatory Compliance: The LM8500HLQ9 is classified under ECCN EAR99 and is REACH unaffected, ensuring compliance with international regulations and standards.
• Moisture Sensitivity: The device has a moisture sensitivity level (MSL) of 1, indicating it is suitable for unlimited exposure to standard environmental conditions, reducing the risk of moisture-related damage during storage and assembly.

LM8500HLQ9 Applications

The LM8500HLQ9 is ideal for a range of applications where a reliable and precise touch screen interface is required. Some specific use cases include:

• Industrial Control Panels: The wide operating temperature range and robust performance make the LM8500HLQ9 suitable for industrial control panels and human-machine interfaces (HMIs) that need to operate in varying environmental conditions.
• Consumer Electronics: The device's compact size and power efficiency make it a good fit for consumer electronics such as tablets, e-readers, and smart appliances, where space and battery life are critical considerations.
• Medical Devices: The LM8500HLQ9 can be used in medical devices that require touch screen interfaces, such as diagnostic equipment and patient monitoring systems, where accuracy and reliability are paramount.
• Automotive Applications: The device's ability to operate within a broad temperature range and its resistance to moisture make it suitable for automotive applications, including infotainment systems and dashboard controls.

Conclusion of LM8500HLQ9

The LM8500HLQ9 from Texas Instruments is a versatile and reliable touch screen controller that offers high precision and efficient power usage. Its 4-wire resistive touchscreen interface, wide operating temperature range, and UART communication interface make it suitable for a variety of applications, from industrial control panels to consumer electronics and medical devices. Despite being marked as obsolete, the LM8500HLQ9 remains a valuable component for designers seeking a proven and reliable touch screen solution. Its compliance with international regulations and standards, along with its moisture resistance, further enhance its appeal for use in diverse and demanding environments.