AD8221 TABLE OF CONTENTS Features .. 1 Layout .. 18 Applications ... 1 Reference Terminal .. 19 General Description ... 1 Power Supply Regulation and Bypassing .. 19 Connection Diagram ... 1 Input Bias Current Return Path ... 19 Revision History ... 2 Input Protection ... 19 Specifications ... 3 RF Interference ... 20 Absolute Maximum Ratings .. 8 Precision Strain Gage ... 20 Thermal Characteristics .. 8 Conditioning ±10 V Signals for a +5 V Differential Input ESD Caution .. 8 ADC ... 20 Pin Configuration and Function Descriptions ... 9 AC-Coupled Instrumentation Amplifier .. 21 Typical Performance Characteristics ... 10 Die Information .. 22 Theory of Operation .. 17 Outline Dimensions ... 23 Gain Selection ... 18 Ordering Guide .. 24 REVISION HISTORY3/11—Rev. B to Rev. C Added Pin Configuration and Function Descriptions Section .. 9 Added Die Information Section ... 22 Updated Outline Dimensions ... 23 Changes to Ordering Guide .. 24 9/07—Rev. A to Rev. B Changes to Features .. 1 Changes to Table 1 Layout ... 3 Changes to Table 2 Layout ... 5 Changes to Figure 15 .. 11 Changes to Figures 32 .. 13 Changes to Figure 33, Figure 34, and Figure 35 ... 14 Updated Outline Dimensions ... 21 Changes to Ordering Guide .. 22 11/03—Rev. 0 to Rev. A Changes to Features .. 1 Changes to Specifications Section .. 4 Changes to Theory of Operation Section .. 13 Changes to Gain Selection Section... 14 10/03—Revision 0: Initial Version Rev. C | Page 2 of 24