Datasheet AD8555 (Analog Devices) - 4

AD8555 Data Sheet Parameter Symbol Conditions Min Typ Max Unit
DIGITAL INTERFACE Input Current 2 µA DIGIN Pulse Width to Load 0 tw0 TA = 25°C 0.05 10 µs DIGIN Pulse Width to Load 1 tw1 TA = 25°C 50 µs Time between Pulses at DIGIN tws TA = 25°C 10 µs DIGIN Low TA = 25°C 1 V DIGIN High TA = 25°C 4 V DIGOUT Logic 0 TA = 25°C 1 V DIGOUT Logic 1 TA = 25°C 4 V Rev. B | Page 4 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