link to page 1 link to page 1 link to page 1 link to page 1 link to page 1 link to page 1 link to page 1 link to page 1 link to page 3 link to page 3 link to page 4 link to page 4 link to page 4 link to page 4 link to page 6 link to page 6 link to page 8 link to page 8 link to page 8 link to page 8 link to page 8 link to page 8 link to page 9 link to page 9 link to page 10 link to page 10 link to page 17 link to page 17 link to page 17 link to page 17 link to page 17 link to page 17 link to page 17 link to page 17 link to page 18 link to page 18 link to page 18 link to page 18 link to page 19 link to page 19 link to page 19 link to page 19 link to page 20 link to page 20 link to page 20 link to page 20 link to page 20 link to page 20 link to page 20 link to page 20 link to page 21 link to page 21 link to page 22 link to page 22 AD8228TABLE OF CONTENTS Features .. 1 Architecture .. 16 Applications... 1 Setting the Gain .. 16 General Description ... 1 Common-Mode Input Voltage Range ... 16 Connection Diagram ... 1 Reference Terminal .. 17 Revision History ... 2 Layout .. 17 Specifications... 3 Input Protection ... 18 Gain = 10 ... 3 Radio Frequency Interference (RFI) .. 18 Gain = 100 ... 5 Applications Information .. 19 Absolute Maximum Ratings.. 7 Differential Drive ... 19 Thermal Resistance .. 7 Precision Strain Gage... 19 ESD Caution.. 7 Driving a Differential ADC .. 19 Pin Configuration and Function Descriptions... 8 Outline Dimensions ... 20 Typical Performance Characteristics ... 9 Ordering Guide .. 21 Theory of Operation .. 16 REVISION HISTORY7/08—Revision 0: Initial Version Rev. 0 | Page 2 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION CONNECTION DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GAIN = 10 GAIN = 100 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ARCHITECTURE SETTING THE GAIN COMMON-MODE INPUT VOLTAGE RANGE REFERENCE TERMINAL LAYOUT Common-Mode Rejection Ratio over Frequency Power Supplies References Input Bias Current Return Path INPUT PROTECTION Input Voltages Beyond the Rails Large Differential Voltages When G = 100 RADIO FREQUENCY INTERFERENCE (RFI) APPLICATIONS INFORMATION DIFFERENTIAL DRIVE PRECISION STRAIN GAGE DRIVING A DIFFERENTIAL ADC OUTLINE DIMENSIONS ORDERING GUIDE