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AT42QT2120-MMHR - Microchip

Description: Capacitive Touch Sensors QTouchADC, 12 Button Wheel/Slider

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AT42QT2120-MMHR - Microchip - PCB symbol
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PCB Footprints
AT42QT2120-MMHR - Microchip PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - AT42QT2120-MMHR
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3D Models
AT42QT2120-MMHR - Microchip - 3D model - Quad Flat No-Lead - AT42QT2120-MMHR
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AT42QT2120-MMHR Details

  • Manufacturer Part Number:

    AT42QT2120-MMHR

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    VQFN-20

  • Pin Count:

    20

  • Manufacturer Package Code:

    VQFN-20

  • Country Of Origin:

    South Korea

  • Factory Lead Time:

    7 Weeks

  • Manufacturer:

    Microchip Technology Inc

  • YTEOL:

    14

  • Body Breadth:

    3 mm

  • Body Height:

    0.78 mm

  • Body Length or Diameter:

    3 mm

  • JESD-609 Code:

    e4

  • Mounting Feature:

    SURFACE MOUNT

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output:

    DIGITAL

  • Output Range:

    0.60-2.60V

  • Output Type:

    DIGITAL VOLTAGE

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Equivalence Code:

    LCC20,.12SQ,18

  • Package Shape/Style:

    SQUARE

  • Sensors/Transducers Type:

    CAPACITIVE TOUCH SENSOR

  • Supply Voltage-Max:

    5.5 V

  • Supply Voltage-Min:

    1.8 V

  • Surface Mount:

    YES

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

AT42QT2120-MMHR Frequently Asked Questions (FAQs)

  • The recommended PCB layout for the AT42QT2120-MMHR involves placing the sensor on a separate layer from the MCU and other noisy components, using a ground plane to shield the sensor, and keeping the sensor's analog output traces short and away from digital signals.
  • Calibration involves adjusting the sensor's sensitivity and offset to match the specific application requirements. This can be done by applying a known touch stimulus and adjusting the sensor's registers to achieve the desired response.
  • The AT42QT2120-MMHR is rated for operation from -40°C to +85°C, but the optimal operating temperature range is between 0°C to 70°C for best performance and accuracy.
  • To minimize EMI, use a shielded cable for the sensor's analog output, keep the sensor away from sources of EMI, and use a common mode choke or ferrite bead to filter out high-frequency noise.
  • A 10uF ceramic capacitor in parallel with a 100nF ceramic capacitor, placed as close as possible to the sensor's power pins, is recommended for optimal power supply decoupling.

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AT42QT2120-MMHR Overview

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About Microchip

Microchip Technology Inc. is a leading manufacturer of microcontrollers and semiconductor devices for a wide range of applications in the aerospace, automotive, consumer electronics, industrial, and medical industries. Alongside a comprehensive product portfolio, Microchip Technology Inc. also provides easy-to-use development tools that enable engineers to create optimal designs quickly with minimal iterations to reduce risk while lowering total system costs to market. Headquartered in Chandler, Arizona, th

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