The ADS7843E is an integrated circuit (IC) component designed for resistive touch screen controller applications. It is manufactured by Texas Instruments and is widely used in various touchscreen devices. Here is an overview and some key features of the ADS7843E:
1. Analog-to-Digital Converter (ADC): The ADS7843E features a 12-bit successive approximation ADC that converts the analog input from the touch screen into a digital value. This provides accurate positioning and precise touch response.
2. Touch Screen Controller: It acts as a controller for resistive touch screens, converting the touch coordinates into digital values that can be processed by microprocessors or microcontrollers.
3. SPI Interface: The ADS7843E communicates with the host device using a Serial Peripheral Interface (SPI). This interface allows for easy integration with a wide range of microcontrollers and other digital devices.
4. Low Power Consumption: The IC is designed to operate with low power consumption, making it suitable for portable devices with limited power resources. It features a power-down mode that further reduces power consumption during idle periods.
5. 4-Wire Touch Screen Support: The ADS7843E supports 4-wire resistive touch screens, which are commonly used in various applications. It provides accurate touch position measurements and supports pressure sensing for enhanced functionality.
6. Integrated Touch Screen Voltage Reference: The IC incorporates a voltage reference circuitry on-chip, eliminating the need for an external voltage reference component
