AT42QT1070-SSUR IC Sensors by Microchip Technology

Status: Active
Series: AT42QT1070
RoHS: Compliant
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The AT42QT1070 (QT1070) is a digital burst mode charge-transfer capacitive sensor driver. The device can sense from one to seven keys, dependent on mode.

The QT1070 has the optimized architecture where no external components are required and only 1-pin per channel. It includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions, and the outputs are fully debounced.

The QT1070 modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise, and to suppress RF emissions. The QT1070 use a dual-pulse method of acquisition. This provides greater noise immunity and eliminates the need for external sampling capacitors, allowing touch sensing using a single pin.

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Prices starting from US$0.91

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Features

Comms mode
Standalone mode
Comms mode: 1 – 7 keys (or 1 – 6 keys plus a Guard Channel)
Standalone mode: 1 – 4 keys plus a fixed Guard Channel on key 0
Number of I/O Lines in Standalone mode: 5 outputs
Technology: Patented spread-spectrum charge-transfer
Key Outline Sizes: 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible
PCB Layers Required: One
Electrode Materials: Etched copper; Silver; Carbon; Indium Tin Oxide (ITO)
Panel Materials: Plastic; Glass; Composites; Painted surfaces (low particle density metallic paints possible
Panel Thickness: Up to 10 mm glass; Up to 5 mm plastic (electrode size dependent)
Comms mode: individually settable via simple commands over I2C-compatible interface
Standalone mode: settings are fixed
I2C -compatible slave mode (400 kHz)
Discrete detection outputs
Signal Processing:
Self-calibration
Auto drift compensation
Noise filtering
Adjacent Key Suppression® (AKS®) – up to three groups possible
Power Supply: 1.8 V – 5.5 V
14-pin SOIC RoHS compliant IC
20-pin VQFN RoHS compliant IC

Specifications

Product Type Proximity/Keys/Slider
Input Channels 7
Max Number of keys 7
Slider No
Proximity detection No
Output Channels 0
Measurement Principle E-Field
Report Rate (pps) 0
Number of Touches 0
Power Modes 0
Interface I2C and Discrete
I/O, LED Drivers 0
Other Features Signal Guard/Driven Shield
Temp Range Array
Voltage Min. (V) 1.80
Voltage Max. (V) 5.50
Pins | Packaging 14 | SOIC
Packing Media Tape and reel (3000)

Resources


Application Notes
AN_42092 - AT02260: Driving AT42QT1085
AN_42094 - AT02259: QTouch Schematic and Layout Checklist
AN_42533 - AT13323: QTouch Smart Scan with Lumped Mode
AN_42017 - AVR3002: Moisture Tolerant QTouch Design
AN_42579 - AT12699: Multifunction Compact Keyboard
AN_10758 - QTAN0085: Haptics Design Guide
Low-Power Touch Design
AN_42040 - AVR3003: Driving AT42QT1110 and AT42QT1111
AN_42479 - AT11805: Capacitive Touch Long Slider Design with PTC
AN_QTAN0062 - QTAN0062: QTouch and QMatrix Sensitivity Tuning for Keys, Sliders and Wheels
QTAN0015A-16709.pdf - QTAN0015: Power Supply Considerations
QTAN0017A-16711.pdf - QTAN0017: Checking the Effects of Noise
QTAN0040 - Driving the AT42QT2160 QMatrixT Sensor IC
AN_42593 - AT13764: QTouch Scroll Sensor for Wearables
AN_42655 - AT15291: Migrating QTouch Designs from SAM D MCUs to SAM C MCUs
AN_42064 - AVR3009: Driving QTouch Device with I2C Interface



Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.1432
Shipping Weight (kg) 0.325
Lead Count 14
Package Type SOIC
Package Width or Size .150In(3.90mm)
Soldering Composition Matte Tin

Alternative Descriptions

Capacitive Touch Sensor, -40 To 85Deg C | Newark Electronics
CAPACITIVE TOUCH SENSOR, -40 TO 85DEG C | element14
QTouch 7 Channel Touch Sensor IC | Microchip Technology
AT42QT1070 Series 5.5 V â–’ 10 mA SMT Qtouch 7-Channel Sensor IC - SOIC-14 | Future Electronics
Peripherals ICs | Avnet America


Frequently Asked Questions

Where can I find additional details, specifications and documents for a AT42QT1070-SSUR?

Additional datasheets, footprints and schematics for AT42QT1070-SSUR are listed on our Part Details page. You can also find images and similar parts to AT42QT1070-SSUR on this page.

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What category does AT42QT1070-SSUR fall under?

The AT42QT1070-SSUR is listed under Semiconductors - ICs > IC Sensors > Capacitive Touch Sensors.

Can I view similar or alternative parts?

You can view similar parts to AT42QT1070-SSUR when available in the Capacitive Touch Sensors range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the AT42QT1070-SSUR you can contact the distributor directly for product support, shipping queries etc.

Is the AT42QT1070-SSUR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for AT42QT1070-SSUR have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, Microchip Technology and Future Electronics have stock available or on a lead time for AT42QT1070-SSUR.

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