ADS7846N/2K5

Overview

The ADS7846N/2K5 is a resistive touch screen controller manufactured by Texas Instruments, designed for 4-wire touch screen applications. It integrates a 12-bit analog-to-digital converter (ADC) with a sampling rate of 125 kS/s. The device operates on a supply voltage range of 2.2 V to 5.25 V and draws a typical operating current of 280 µA. It features a serial interface compatible with SPI protocols. The component is housed in a TSSOP-16 package and supports an industrial operating temperature range from -40°C to +85°C.

Feature Summary

• 12-bit resolution ADC with 125 kS/s sampling rate
• Serial 3-Wire or SPI interface compatibility
• Low power consumption: 280 µA operating current
• Wide supply voltage range: 2.2 V to 5.25 V

Applications

• 4-wire resistive touch screen controllers
• Industrial human-machine interfaces (HMI)
• Medical devices requiring precise input control

Procurement Notes

Verify the specific package type upon ordering, as datasheets indicate potential variations between SSOP-16 and TSSOP-16 for this part number. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Check for end-of-life notifications, as discontinuation notices have been recorded for related variants in the ADS7846 series.

Selection Notes

Select the ADS7846N/2K5 when a 12-bit resolution and high-speed sampling are required for resistive touch screens. Ensure the host microcontroller supports the required serial interface protocol. Verify that the system power supply falls within the 2.2 V to 5.25 V range. Consider the TSSOP-16 package dimensions for PCB layout constraints.

Part Context

This component belongs to the ADS7846 family of touch screen controllers from Texas Instruments. It is functionally similar to other models like the ADS7846E/2K5, primarily differing in package style (TSSOP vs. SSOP). The 'N' suffix typically denotes a specific package variant within the product line.

Replacement Considerations

ADS7846E/2K5 is a documented alternative within the same family, offering identical electrical specifications but potentially in an SSOP-16 package instead of TSSOP-16.