AMRS-2325 Mobile Navigation Pad Module Data Sheet Description Features 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. • 360 degree navigation The spring loaded center button has large enough displacement to allow mouse-like cursor control on a variety of screen sizes. In addition, the center button provides a click function anywhere in the field of motion with tactile feedback. The AMRS-2325 navigation pad module and AMRI-1000 navigation sense and interface IC form a unique navigation solution for mobile devices by providing superior tactile feedback as well as multiple cursor control operating modes in a small package. • 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 Theory of Operation Applications 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. • Computer Peripherals 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. • Mobile Multi Media Players A selection or clicking operation can be performed by fully pressing the sliding disk. A dome switch provides tactile feedback for this operation. • Remote Controls • PDAs and Tablet PCs • Sub-Notebook and Laptop PCs • Video Game Controllers • Joystick applications Dimensions 23 ∅ .0± 5 0.0 n15.0±0.05 4-PCB LOCATOR PIN 0.85±0.08 Figure 1. Navigation Pad Module dimensions 2.18±0.1 (n15.0) 4±0.1 2.6+0.05 0 BUTTON DIAMETER Reference Electrode Design All units are in mm unless specified All tolerances are ±0.05 unless specified PCB configurations:• 4 Layers FR4, thickness = 1.6mm • 1oz copper • Prepreg thickness = 0.014” (2-7628) • Effective soldermask thickness = 25mm Figure 2. Electrodes Layout Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units Notes Storage Temperature TS -40 85 °C Maximum Units Notes 70 °C Non-condensed Notes Recommended Operating Conditions Parameter Symbol Minimum Operating Temperature TA -25 Typical Mechanical System Specifications Parameter Symbol Minimum Typical Maximum Units 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 Max travel force Fms 50 100 135 g 2.63 2.85 3.06 mm From center in all directions um Radial from ideal center position Travel [1] Re-centering offset 340 Initial displacement force from center position Notes: [1] Includes re-centering offset For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright © 2007 Avago Technologies Limited. All rights reserved. AV02-0480EN - June 8, 2007