AT42QT1040-MMH Atmel, AT42QT1040-MMH Datasheet - Page 5

• Manufacturer Part Number: AT42QT1040-MMH
• Description: IC TOUCH SENSOR 4KEY 20-VQFN
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Resistiver

Specifications of AT42QT1040-MMH

• Touch Panel Interface: 4, 2-Wire
• Number Of Inputs/keys: 4 Key
• Data Interface: I²C, Serial
• Data Rate/sampling Rate (sps, Bps): 200k
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Current - Supply: 10mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Output Type: Logic
• Input Type: Logic
• Supply Voltage: 1.8 V to 5.5 V
• Dimensions: 3 mm L x 3 mm W x 0.8 mm H
• Output Voltage: 0.7 V to 0.8 V
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: AT42QT1040-MMH; AT42QT1040-MMHTR

Touch Sensors Design Guide
Section 6
Mutual-capacitance One-dimensional Sensors.......................................................... 6-1
Appendix A
Glossary of Terms ......................................................................................................A-1
5.4
6.1
6.2
6.3
6.4
Typical Resistively Interpolated Method ............................................................................ 5-6
Introduction ........................................................................................................................ 6-1
General Advice .................................................................................................................. 6-1
Typical Spatially Interpolated Method ................................................................................ 6-2
Typical Resistively Interpolated Method .......................................................................... 6-10
5.3.3
5.4.1
6.2.1
6.2.2
6.2.3
6.2.4
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.4.1
6.4.2
6.4.3
Medium/Large Slider Or Wheel ........................................................................... 5-4
Medium/Large Slider Or Wheel ........................................................................... 5-6
QMatrix Channels ................................................................................................ 6-1
Ground Loading ................................................................................................... 6-1
Floating Conductive Items ................................................................................... 6-1
Conductive Paints................................................................................................ 6-1
Introduction .......................................................................................................... 6-2
One-Layer Small Slider Or Wheel ....................................................................... 6-2
One-Layer Medium/Large Slider Or Wheel ......................................................... 6-5
Two-Layer Small Slider Or Wheel ....................................................................... 6-6
Two-layer Medium/Large Slider Or Wheel........................................................... 6-8
Introduction ........................................................................................................ 6-10
One-Layer Medium/Large Slider Or Wheel ....................................................... 6-10
Two-Layer Medium/Large Slider Or Wheel ....................................................... 6-11
Table of Contents (Continued)
10620D–AT42–04/09
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