TSC2003IR

Overview

The TSC2003IR is a four-wire resistive touch screen controller manufactured by Texas Instruments. It integrates a 12-bit analog-to-digital converter (ADC) and a programmable power-down sequence to manage system power efficiently. The device supports serial communication via an SPI-compatible interface, allowing for direct connection to microcontrollers without requiring complex external logic. Key electrical specifications include a supply voltage range of 2.7V to 5.5V and a typical conversion time of 10 microseconds. The component is designed for applications requiring precise position detection in portable electronic devices.

Feature Summary

• Integrated 12-bit ADC with SPI-compatible serial interface
• Programmable power-down sequence for low-power operation
• Supply voltage range from 2.7V to 5.5V
• Typical conversion time of 10 microseconds

Applications

• Portable handheld devices
• Industrial control panels
• Medical instrumentation displays

Procurement Notes

Verify the suffix 'IR' indicates the tape and reel packaging option when ordering. Confirm the operating temperature range matches the industrial specification (-40°C to +85°C). Ensure the target system voltage aligns with the 2.7V to 5.5V input requirements. Check for pin compatibility if replacing older versions like the TSC2003IDR.

Selection Notes

Select this component when a dedicated touch controller with integrated ADC is required. It is suitable for systems where board space is limited and an external ADC is undesirable. Consider the SPI interface speed limitations if high-frequency sampling is necessary. Verify that the resistive touch panel impedance is within the controller's acceptable input range.

Part Context

The TSC2003 series serves as a specialized solution for resistive touch interfaces. It differs from general-purpose ADCs by including specific timing sequences for touch panel calibration and power management. This model represents the industrial-grade variant with extended temperature capabilities compared to commercial options.

Replacement Considerations

Direct substitutes may include the TSC2003IDR for identical functionality in different packaging. Other Texas Instruments models like the ADS7846 offer similar features but may require additional configuration. Verify pinout compatibility before swapping components to avoid circuit redesign.