ADS7843IDBQRHB

Overview

The ADS7843IDBQRHB is a four-wire resistive touch screen controller manufactured by Texas Instruments. It features a 12-bit resolution and utilizes a serial interface for data communication. The device operates within a supply voltage range of 2.7V to 5V and consumes 280 µA of current. It is designed for surface mount installation in a 16-SSOP package with a width of 3.90mm. The component supports an external voltage reference and functions across a temperature range of -40°C to 85°C. It holds AEC-Q100 qualification for automotive applications.

Feature Summary

• Supports four-wire resistive touch screen input detection
• Provides 12-bit resolution for coordinate acquisition
• Utilizes a serial interface for digital communication
• Qualified for automotive grade environments

Applications

• Automotive infotainment systems requiring resistive touch input
• Industrial control panels with four-wire resistive displays
• Embedded human-machine interfaces in harsh temperature environments

Procurement Notes

Verify the specific suffix 'HB' against the official Texas Instruments datasheet to confirm assembly material qualifications, as this variant may differ from standard production runs. Ensure the source document explicitly lists ADS7843IDBQRHB as an active or last-buys part number. Confirm that the 16-SSOP package dimensions match the required PCB footprint. Check for any recent Product Change Notices affecting the assembly materials or manufacturing location associated with this specific suffix.

Selection Notes

Select this component when a dedicated four-wire resistive touch controller is required for automotive or industrial applications. The 12-bit resolution offers precise coordinate tracking suitable for general purpose interfaces. The wide operating temperature range ensures reliability in extreme conditions. Consider the external voltage reference requirement when designing the power supply circuitry. Verify compatibility with the host microcontroller's serial interface protocols before integration.

Part Context

This part belongs to the ADS7843 family of touch screen controllers from Texas Instruments. The base ADS7843 model provides core functionality for resistive touch sensing. The IDBQRHB suffix indicates a specific package type, temperature range, and potentially qualified assembly materials for automotive use. It shares architectural similarities with other members of the series but differs in packaging and qualification status.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's obsolescence notices or cross-reference tools for potential alternatives if this specific suffix becomes unavailable.