AT42QT1070-MMH Atmel, AT42QT1070-MMH Datasheet - Page 62

• Manufacturer Part Number: AT42QT1070-MMH
• Description: IC TOUCH SENSOR 7KEY 20-VQFN
• Manufacturer: Atmel
• Type: Capacitiver

Specifications of AT42QT1070-MMH

• 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: 20-VFQFN Exposed Pad
• 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

10620D–AT42–04/09
Mutual-capacitance One-dimensional Sensors
6.3.5
6.3.5.1
6.3.5.2
6-8
Two-layer Medium/Large Slider Or Wheel
Introduction
Slider
When construcing two-layer medium/large sliders and wheels the electrodes are constructed from
slanted “segments”.
For a slider, each “segment” is 4 mm high, and the slider is constructed from as many segments as is
necessary to obtain the required height, as shown in
direction of the slant of the “segments” alternates in
Figure 6-6.
4 mm
X -1
X 1
n
n-
Two-layer Medium/Large Slider (Spatially Interpolated)
q
Max Length
= 90° to 30° Depending on Length Required
0.1–0.5 mm
Gap
4 mm
4 mm
@
(
¾¾¾¾
W x (n-1) + 4 mm
X 2
X -2
tan
n-
n
q
)
X 3
X 3
n-
n-
Y, 0.1–0.5 mm Width
Y, 0.1–0.5 mm Width
Figure 6-6
Figure 6-6 on page
to give a zigzag effect.
Height = 4 mm x Ystripes = 16 mm
6-8. Note the way in which the
Use as many segments
as necessary to achieve
desired height.
Touch Sensors Design Guide
X0
X0
4 mm
4 mm