AT42QT1070-SSU Atmel, AT42QT1070-SSU Datasheet - Page 65

• Manufacturer Part Number: AT42QT1070-SSU
• Description: IC TOUCH SENSOR 7KEY 14-SOIC
• Manufacturer: Atmel
• Type: Capacitiver

Specifications of AT42QT1070-SSU

• Number Of Inputs/keys: 7 Key (Comms), 5 Key (Standalone)
• Data Interface: I²C
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Supply Voltage: 1.8 V to 5.5 V
• Dimensions: 3 mm L x 3 mm W x 0.8 mm H
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Resolution (bits): -
• Touch Panel Interface: -
• Data Rate/sampling Rate (sps, Bps): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.4.3
Touch Sensors Design Guide
Two-Layer Medium/Large Slider Or Wheel
Creating larger sliders and wheels when using a flooded X design follows the same principles as in
Section 6.3.5 “Two-layer Medium/Large Slider Or Wheel” on page
introduced using resistive dividers on the X lines.
Figure 6-10. Two-layer Medium/Large Slider (Resistively Interpolated)
Figure 6-11. Two-layer Medium/Large Wheel (Resistively Interpolated)
X -1
n
Extra R
esistive Segment(s) For
For X Electrode
Extra Resistive
Rtotal typically 2 k to 10
Segment(s)
X0
W
X Electrode
kW
X 2
n-
Mutual-capacitance One-dimensional Sensors
Rtotal typically
2 k to 10
X1
W
X0
6-8, except that extra segments are
kW
For design rules, see
Figure 6-6 on page 6-8
For design rules, see
Figure 6-7 on page 6-9
10620D–AT42–04/09
6-11