Datasheet AD8555 (Analog Devices) - 2

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AD8555 Data Sheet TABLE OF CONTENTS
Features .. 1 Open Wire Fault Detection ... 20 Applications ... 1 Shorted Wire Fault Detection ... 20 Functional Block Diagram .. 1 Floating VPOS, VNEG, or VCLAMP Fault Detection ... 20 General Description ... 1 Device Programming ... 20 Revision History ... 2 Filtering Function ... 26 Electrical Specifications ... 3 Driving Capacitive Loads .. 26 Absolute Maximum Ratings .. 7 RF Interference ... 27 ESD Caution .. 7 Single-Supply Data Acquisition System .. 27 Pin Configurations and Function Descriptions ... 8 Using the AD8555 with Capacitive Sensors ... 28 Typical Performance Characteristics ... 10 Outline Dimensions ... 29 Theory of Operation .. 18 Ordering Guide .. 29 Gain Values .. 19
REVISION HISTORY 2/15—Rev. A to Rev. B
Changes to Applications Section .. 1 Changes to Table 5 .. 8 Changes to Figure 3 .. 9 Added Table 6; Renumbered Sequential y .. 9 Changes to Figure 64 .. 29 Updated Outline Dimensions ... 29 Changes to Ordering Guide .. 29
6/09—Rev. 0 to Rev A
Changes to General Description .. 1 Changes to Figure 3 and Table 5 ... 8 Updated Outline Dimensions ... 28 Changes to Ordering Guide .. 28
4/04—Revision 0: Initial Version
Rev. B | Page 2 of 29 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION GAIN VALUES OPEN WIRE FAULT DETECTION SHORTED WIRE FAULT DETECTION FLOATING VPOS, VNEG, OR VCLAMP FAULT DETECTION DEVICE PROGRAMMING Digital Interface Initial State Simulation Mode Programming Mode Parity Error Detection Read Mode Sense Current Suggested Programming Procedure Suggested Algorithm to Determine Optimal Gain and Offset Codes FILTERING FUNCTION DRIVING CAPACITIVE LOADS RF INTERFERENCE SINGLE-SUPPLY DATA ACQUISITION SYSTEM USING THE AD8555 WITH CAPACITIVE SENSORS OUTLINE DIMENSIONS ORDERING GUIDE