ADS7846N

Overview

The ADS7846N is a resistive touch screen controller manufactured by Texas Instruments, designed for 4-wire analog touch interfaces. It features a 12-bit resolution and supports a sampling rate of 125 kS/s. The device operates on a supply voltage range of 2.2 V to 5.25 V with a typical operating current of 280 µA. Communication is handled via a serial 3-wire SPI interface. It functions within an industrial temperature range of -40°C to +85°C and is housed in a TSSOP-16 package.

Feature Summary

• 12-bit resolution with 125 kS/s sampling rate
• Serial 3-wire SPI interface compatibility
• Low power consumption at 280 µA operating current
• Industrial temperature range (-40°C to +85°C)

Applications

• 4-wire resistive touch screen positioning systems
• Handheld devices requiring low-power touch input
• Industrial control panels with resistive overlays

Procurement Notes

Verify the specific suffix 'N' against the manufacturer's official datasheet to confirm the TSSOP-16 package variant. Check for End-of-Life (EOL) status notifications from Texas Instruments, as discontinuation notices may affect long-term availability. Ensure RoHS compliance documentation matches the specific production batch requirements.

Selection Notes

Select this component when a dedicated resistive touch controller with SPI connectivity is required. Verify that the system power supply falls within the 2.2 V to 5.25 V range. Confirm that the target application utilizes a 4-wire resistive touch panel architecture compatible with the internal multiplexer configuration.

Part Context

The ADS7846N belongs to the ADS7846 family of touch screen controllers from Texas Instruments. This series integrates a 12-bit ADC, sample-and-hold, and serial interface into a single chip. The 'N' designation specifically identifies the TSSOP-16 surface-mount package variant within the broader product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.