TSC2046EQPWRQ1

Overview

The TSC2046EQPWRQ1 is a low-voltage I/O resistive touch screen controller qualified for automotive applications under AEC-Q100 standards. It features a 12-bit SAR ADC with a throughput rate of 125 kHz and supports QSPI/SPI 3-wire interfaces. The device operates on a +VCC supply from 2.2 V to 5.25 V, while digital I/O (IOVDD) ranges from 1.5 V to 5.25 V. Key integrated functions include an internal 2.5-V reference, direct battery monitoring up to 6 V, on-chip temperature sensing, and touch-pressure measurement. It utilizes a TSSOP-16 package and maintains 100% pin compatibility with the ADS7846.

Feature Summary

• Automotive qualification (AEC-Q100) with specified performance over -40°C to +125°C.
• 12-bit resolution with 125 kHz sampling rate and auto power-down capabilities.
• Integrated 2.5-V reference, battery monitor (0–6 V), and temperature sensor.
• Supports 1.5 V to 5.25 V digital I/O levels for flexible system integration.

Applications

• Automotive touch screen monitors
• Portable equipment with resistive touch screens
• Battery-powered systems requiring voltage monitoring

Procurement Notes

Verify the specific ordering suffix 'Q1' confirms AEC-Q100 automotive qualification and extended temperature range (-40°C to +125°C). Confirm the 'PW' suffix indicates the TSSOP-16 package type. Ensure the reel quantity matches the standard factory pack size of 2000 units as listed in the ordering information.

Selection Notes

Select this component when upgrading from ADS7846 designs due to its identical pinout and support for lower voltage digital I/O (down to 1.5 V). Choose the TSC2046EQPWRQ1 specifically for automotive environments requiring high reliability and wide operating temperatures. Consider the internal 2.5-V reference for simplified external circuitry if differential mode is not strictly required for all measurements.

Part Context

This part belongs to the TSC2046E family, representing the next-generation successor to the ADS7846. The 'Q1' designation distinguishes it as the automotive-grade variant, offering enhanced durability and compliance with automotive industry standards compared to commercial versions like the TSC2046IPWR.

Replacement Considerations

The TSC2046EQPWRQ1 is a drop-in replacement for the ADS7846 in existing sockets due to 100% pin compatibility. Verify that the host system's digital logic supports the wider IOVDD range (1.5 V to 5.25 V) if replacing older controllers with stricter voltage requirements.

FAQ

How does the TSC2046EQPWRQ1 handle touch pressure measurement?

It supports two methods: one using X-plate resistance and Z1/Z2 cross-panel measurements, and another using X/Y positions and Z1. An 8-bit resolution mode is recommended for these calculations to optimize speed.

What is the input voltage range for the battery monitor?

The VBAT pin can monitor battery voltages ranging from 0 V to 6 V. The internal divider scales this down so that a 5.5 V input results in 1.375 V at the ADC input.

Can the internal 2.5-V reference be powered down?

Yes, the internal reference can be turned off via the PD1 control bit to conserve power. However, it must be commanded off after power-up to maintain compatibility with the ADS7843.