AMRS-2325
Mobile Navigation Pad Module
Data Sheet
Description
The AMRS-2325 is a navigation pad module for use
with the AMRI-1000 navigation sense and interface IC.
Together they provide a mouse-like pointing solution.
The spring loaded center button has large enough dis-
placement to allow mouse-like cursor control on a variety
of screen sizes. In addition, the center button provides a
click function anywhere in the eld of motion with tactile
feedback.
The AMRS-2325 navigation pad module and AMRI-1000
navigation sense and interface IC form a unique naviga-
tion solution for mobile devices by providing superior
tactile feedback as well as multiple cursor control
operating modes in a small package.
Theory of Operation
The AMRS-2325 is a capacitance based sensor module.
A sliding disk is held at a center position by a patented
spring system when the pointer is not being used. Cursor
navigation is activated when slider senses the button
touch.
The sliding disk may be moved in any direction with
excellent tactile feedback provided by the retention
spring system. The navigation sense and interface IC
tracks the movement of the sliding disk on an electrode
array providing a mobile navigation experience similar to
that provided by a PC mouse or analog joystick.
A selection or clicking operation can be performed by
fully pressing the sliding disk. A dome switch provides
tactile feedback for this operation.
Features
• 360 degree navigation
• Integrated select button
• Superior tactile response
• Intuitive to use
• Single handed operation
• 2.5 mm horizontal travel in all directions
• Vertical travel for touch sense detection
• Small form factor: 23 mm x 4 mm (diameter x height)
• No electrical connection to Pad Module required
• 3 million button strokes
• 1 million button click
Applications
• Computer Peripherals
• Remote Controls
• PDAs and Tablet PCs
• Sub-Notebook and Laptop PCs
• Mobile Multi Media Players
• Video Game Controllers
• Joystick applications
2
Dimensions
Figure 1. Navigation Pad Module dimensions
Reference Electrode Design
Figure 2. Electrodes Layout
All units are in mm unless specied
All tolerances are ±0.05 unless specied
PCB congurations:-
• 4 Layers FR4, thickness = 1.6mm
• 1oz copper
• Prepreg thickness = 0.014” (2-7628)
• Eective soldermask thickness = 25mm
4-PCB LOCATOR PIN
∅
23.0
±
0.05
n15.0
±
0.05
BUTTON DIAMETER
(n15.0)
0.85
±
0.08
2.18
±
0.1
2.6
+0.05 0
4
±
0.1
Absolute Maximum Ratings
Parameter Symbol Minimum Maximum Units Notes
Storage Temperature TS-40 85 °C
Recommended Operating Conditions
Parameter Symbol Minimum Typical Maximum Units Notes
Operating Temperature TA-25 70 °C Non-condensed
Mechanical System Specications
Parameter Symbol Minimum Typical Maximum Units Notes
Touch sense force Fts 40 95 145 g
Button click force Fbc 220 290 360 g
Centering pre-load force Fcp 15 40 60 g Initial displacement force from center position
Max travel force Fms 50 100 135 g
Travel [1] 2.63 2.85 3.06 mm From center in all directions
Re-centering oset 340 um Radial from ideal center position
Notes:
[1] Includes re-centering oset
For product information and a complete list of distributors, please go to our web site: www.avagotech.com
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Data subject to change. Copyright © 2007 Avago Technologies Limited. All rights reserved.
AV02-0480EN - June 8, 2007