AR1011-I/ML

Overview

The Microchip AR1011-I/ML is a resistive touch screen controller from the mTouch AR1000 series, designed for 4-wire, 5-wire, and 8-wire analog sensors. It features a 10-bit resolution with a typical report rate of 140 reports per second. The device operates on a 2.5V to 5.0V supply and communicates via UART at 9600 baud. Key specifications include a standby current of 40 µA (typical) at 2.5V and 85 µA at 5V. It includes 128 bytes of user EEPROM for calibration storage and supports built-in drift compensation algorithms.

Feature Summary

• Supports 4-wire, 5-wire, and 8-wire analog resistive touch sensors
• UART communication interface operating at 9600 baud
• Built-in drift compensation algorithm and 128 bytes of user EEPROM
• Low power consumption with standby currents as low as 40 µA

Applications

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

Procurement Notes

Verify that the specific part number AR1011-I/ML corresponds to the UART interface variant, as other models in the AR1000 series may utilize SPI or I2C protocols. Confirm the package type matches the QFN-20 specification found in official documentation. Ensure compatibility with the required sensor types (4/5/8-wire) before procurement.

Selection Notes

Select the AR1011-I/ML when a UART interface is required for host communication. Compare standby current requirements against the 40 µA typical value at 2.5V. Ensure the host system can handle the 9600 baud rate. Verify that the 10-bit resolution meets the application's precision needs.

Part Context

The AR1011-I/ML belongs to the Microchip mTouch AR1000 series of resistive touch screen controllers. This series is characterized by proprietary decoding algorithms that reduce host processing overhead. The 'I' suffix indicates an industrial temperature range, and '/ML' denotes the QFN-20 package.

Replacement Considerations

The AR1010T-I/ML is a similar component within the same family but may differ in interface or feature set. Verify interface compatibility (UART vs. others) and pinout differences before substitution. Consult the official datasheet for detailed electrical parameter comparisons.