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Product Detailed Parameters
- Description：IC TOUCH SENSOR 11KEY 32QFN
- Series：QTouch™
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Buttons
- Proximity Detection：No
- Number of Inputs：Up to 11
- LED Driver Channels：Up to 7
- Interface：SPI
- Resolution：-
- Voltage - Supply：3V ~ 5.5V
- Current - Supply：12mA
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：32-VFQFN Exposed Pad
- Supplier Device Package：32-VQFN (5x5)
- Grade：-
- Qualification：-
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Overview
The AT42QT1110-MZ is a digital burst mode charge-transfer capacitive sensor driver designed for touch-key applications. It supports up to 11 QTouch channels and operates on a 3 V to 5.5 V supply. The device features a full-duplex SPI slave interface with a maximum clock frequency of 1.5 MHz. It utilizes patented spread-spectrum charge-transfer technology and includes Adjacent Key Suppression (AKS) for accurate detection. Configuration data is stored in internal EEPROM, and the component is qualified for automotive environments.
Feature Summary
- Supports up to 11 QTouch channels with configurable acquisition modes
- Integrated signal processing including self-calibration and auto drift compensation
- Configurable discrete Detect outputs for individual key status indication
- Patented spread-spectrum charge-transfer technology for noise suppression
Applications
- Automotive radio controls
- Keyless entry systems
- Electric window controllers
- Satellite navigation interfaces
Procurement Notes
Verify the specific package type required for the design, as the MZ suffix denotes the 32-pin 5 × 5 mm MLF RoHS compliant variant. Confirm that the host system supports the required SPI timing parameters and voltage levels before finalizing the procurement order.
Selection Notes
Select this model when an automotive-qualified capacitive touch solution is needed. Ensure the application requires either the 11-key digital reporting mode or the 7-key standalone PWM output mode. Verify that the panel thickness and electrode materials are compatible with the specified sensitivity ranges.
Part Context
This component belongs to the AT42QT1110 family of QTouch sensors. The MZ suffix specifically identifies the 32-pin 5 × 5 mm MLF package. Other variants include the AZ suffix for the 32-pin TQFP package and other suffixes for different packaging options within the same functional family.
Replacement Considerations
The AT42QT1110-AZ serves as a direct pin-compatible replacement if a TQFP package is preferred over the MLF form factor. Both share identical electrical characteristics and functionality.
