AR1020T-I/ML

Overview

The AR1020T-I/ML is a resistive touch screen controller from the Microchip AR1000 series, housed in a QFN-20 package. It supports 4-wire, 5-wire, and 8-wire analog resistive sensors with a maximum 10-bit resolution. The device operates on a 2.5V to 5.0V supply and features an integrated 128-byte user EEPROM for calibration storage. Key electrical parameters include a typical standby current of 85 µA at 5V and 40 µA at 2.5V. It provides a touch coordinate report rate of up to 140 reports per second under standard sensor conditions.

Feature Summary

• Supports 4-wire, 5-wire, and 8-wire analog resistive touch sensors
• Integrated 128-byte user EEPROM for independent calibration storage
• Built-in drift compensation algorithm for enhanced reliability
• Industrial temperature range operation (-40°C to +85°C)

Applications

• Mobile communication devices
• Personal Digital Assistants (PDA)
• Global Positioning Systems (GPS)
• Touch Screen Monitors
• Point of Sale Terminals

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm that the 'I' designation corresponds to the industrial temperature range specifications. Ensure the host system interface matches the I2C slave mode capabilities defined for this part number variant.

Selection Notes

Select the AR1020T-I/ML when I2C communication is required, as it differs from the SPI-only AR1010 or UART-only AR1011 variants. Ensure the design accommodates the open-drain SDO interrupt pin and pull-up requirements for the SCL and SDA lines. Verify that the target application utilizes analog resistive sensors compatible with the supported wire configurations.

Part Context

This component belongs to the AR1000 Series Resistive Touch Screen Controllers. It shares core decoding algorithms and physical dimensions with other members like the AR1010 and AR1021 but is distinguished by its specific communication interface configuration. The T-I/ML suffix denotes the reel packaging and industrial temperature grade within this family.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.