AT42QT1070-MMH Atmel, AT42QT1070-MMH Datasheet - Page 60

• 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
6.3.4
6.3.4.1
6.3.4.2
6-6
Two-Layer Small Slider Or Wheel
Introduction
Slider
This sensor style uses a Flooded X design (see
10) and can operate with 3 or more channels. The basic layout rules listed in
do the layer separation rules.
When designing a slider, if the height of the X electrodes are 8 mm or less, then a single Y trace can be
used, as in
maximum separation to 4 mm (see
Figure 6-3.
Figure 6-4.
2–4 mm
2–4 mm
1.5–4 mm
Between Y
and Edge
of X
1.5–4 mm
Figure
Two-layer Small Slider: Single Y Trace (Spatially Interpolated)
Two-layer Small Slider: Multiple Y Traces (Spatially Interpolated)
6-3. However, as the slider gets taller, more Y “stripes” must be added to keep the
Gap Between X Electrodes
X -1
X n-1
n
0.1 0.5 mm
0.1 0.5 mm
–
–
Figure
X 2
X 2
n-
n-
6-4).
Y, 0.1 0.5 mm Width
Section 4.3.2 “Flooded-X Two-layer Method” on page 4-
Y, 0.1
Trace Width
–
–0.5
mm
Height = 2 x (1.5–4
mm) + (2 4 mm) x (Ystripes - 1)
6 8 mm
Touch Sensors Design Guide
6 8 mm
–
–
X0
Section 4.3.2
X0
–
3–8 mm
still apply, as