ADS7845E/2K5

Overview

The ADS7845E/2K5 is a resistive touch screen controller manufactured by Texas Instruments. It features a 12-bit resolution and supports a sampling rate of 125 kS/s. The device operates on a single power supply ranging from 2.7 V to 5.5 V, with a typical operating current of 280 uA. It utilizes a serial interface compatible with SPI protocols for data communication. The component is housed in an SSOP-16 package and is designed for operation within a temperature range of -40°C to +85°C.

Feature Summary

• 12-bit resolution with 125 kS/s sampling rate
• Single-supply operation (2.7 V to 5.5 V)
• Serial interface compatible with standard SPI
• Low power consumption (280 uA typical)

Applications

• Resistive touch screen control systems
• Handheld devices requiring coordinate input
• Industrial control panels with resistive overlays

Procurement Notes

Verify the specific suffix '2K5' against the manufacturer's official documentation to confirm packaging details, as this designation typically indicates reel quantity but may vary by region or revision. Confirm RoHS compliance status through the latest datasheet. Check for End-of-Life (EOL) notifications, as discontinuation notices have been associated with this product family in public records.

Selection Notes

Select the ADS7845E/2K5 when a dedicated resistive touch controller with 12-bit accuracy is required. Ensure the host system supports the necessary serial interface timing. Compare against the ADS7846 series if 4-wire support or different voltage ranges are needed. Verify that the SSOP-16 package fits the PCB layout constraints.

Part Context

This component belongs to the ADS7845 family of touch screen controllers from Texas Instruments. It is functionally similar to the ADS7846 but optimized for specific interface requirements. The 'E' suffix denotes the extended industrial temperature range (-40°C to +85°C). The part is categorized under analog mixed-signal ICs and data converter integrated circuits.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Texas Instruments for current cross-reference recommendations.