ADS7846NG4

Overview

The ADS7846NG4 is a resistive touch screen controller manufactured by Texas Instruments. It features a 12-bit analog-to-digital converter with a sampling rate of 125 kS/s. The device operates on a single power supply ranging from 2.2 V to 5.25 V and draws a typical operating current of 280 µA. It supports serial communication via a 3-wire SPI interface. The component is housed in a 16-pin DIP package and is designed for applications requiring precise position detection on four-wire resistive touch screens.

Feature Summary

• 12-bit resolution ADC with 125 kS/s sampling rate
• Single-supply operation (2.2 V to 5.25 V)
• Low power consumption (280 µA typical)
• 3-wire serial SPI interface

Applications

• Four-wire resistive touch screen positioning
• Handheld devices requiring touch input
• Industrial control panels with resistive overlays

Part Context

The ADS7846NG4 is the leaded, through-hole variant of the ADS7846 family, distinguished by its 16-PDIP package. While other variants like the ADS7846E or ADS7846IRGVT utilize surface-mount packages such as SSOP or QFN, the NG4 suffix indicates compliance with specific environmental standards within the standard DIP form factor. This part serves as the legacy through-hole option for the same core touch controller functionality.

Replacement Considerations

Direct pin-compatible replacements include other ADS7846 variants such as ADS7846E (SSOP) or ADS7846IRGVT (QFN), provided the PCB footprint allows for package adaptation. The ADS7843 is a related controller but may have different feature sets; verify electrical compatibility before substitution.