ADS7843E/2K5

The ADS7843E/2K5 is a high-performance, low-power, 4-wire resistive touch screen controller from Texas Instruments. It is designed to interface with resistive touch screens, providing accurate touch position detection and conversion. Here’s a detailed description of its features and specifications:

Key Features:

1. Touch Screen Interface: The ADS7843E is specifically designed for 4-wire resistive touch screens, allowing for precise touch detection and measurement.

2. Resolution: The device supports a resolution of up to 12 bits, enabling fine touch position accuracy. This high resolution ensures that even small touches are detected and reported accurately.

3. Sampling Rate: The controller can sample touch inputs at a rate of up to 200 samples per second, ensuring quick response times for user interactions.

4. Communication Interface: It utilizes a Serial Peripheral Interface (SPI) for communication with microcontrollers or processors, allowing for fast data transfer and easy integration into various systems.

5. Power Consumption: The ADS7843E is designed for low power consumption, making it suitable for battery-operated devices. It features a power-down mode to further conserve energy when the touch screen is not in use.

6. Operating Voltage: The device operates within a voltage range of 2.7V to 5.5V, providing flexibility for different system designs and power supply configurations.

7. Programmable Features: The ADS7843E includes programmable features such as touch threshold settings, allowing developers to customize the sensitivity of the touch screen to suit specific applications.

8. Built-in Reference Voltage: It has an internal reference voltage, which simplifies the design and reduces the need for external components.

9. Temperature Range: The device is rated for operation over a wide temperature range, making it suitable for various environments, including industrial and consumer applications.

10. Package Options: The ADS7843E is available in a compact package, which is ideal for space-constrained designs. The small footprint allows for easy integration into portable devices.

Applications:

The ADS7843E/2K5 is commonly used in a variety of applications, including:

• Handheld devices (smartphones, tablets)
• Industrial control panels
• Point-of-sale terminals
• Home automation systems
• Medical devices
• Automotive displays

Conclusion:

The ADS7843E/2K5 from Texas Instruments is a versatile and efficient touch screen controller that provides high accuracy and low power consumption, making it an excellent choice for a wide range of touch-enabled applications. Its combination of features, including high resolution, fast sampling rates, and flexible communication options, ensures that it meets the demands of modern touch screen technology.