link to page 1 link to page 1 link to page 1 link to page 1 link to page 2 link to page 3 link to page 5 link to page 5 link to page 6 link to page 7 link to page 15 link to page 16 link to page 16 link to page 17 link to page 18 link to page 20 link to page 20 link to page 21 link to page 21 link to page 22 link to page 22 link to page 22 link to page 22 link to page 23 link to page 23 link to page 28 link to page 28 AD8335Data SheetTABLE OF CONTENTS Features .. 1 VGA ... 18 Applications... 1 Applications Information .. 20 Functional Block Diagram .. 1 Ultrasound .. 20 General Description ... 1 Basic Connections.. 21 Revision History ... 2 Preamp Connections ... 21 Specifications... 3 Input Overdrive .. 22 Absolute Maximum Ratings.. 5 Logic Inputs... 22 ESD Caution.. 5 Common-Mode Pins ... 22 Pin Configuration and Function Descriptions... 6 Driving ADCs ... 22 Typical Performance Characteristics ... 7 Evaluation Board .. 23 Test Circuits... 15 Board Layout... 23 Theory of Operation .. 16 Outline Dimensions ... 28 Enable Summary .. 16 Ordering Guide .. 28 Preamp ... 17 REVISION HISTORY2/12—Rev. A to Rev. B Changes to Figure 1.. 1 Added Exposed Pad Notation to Figure 2 and Table 3.. 6 Changes to Figure 12 Caption... 11 Deleted Measurement Setup Section ... 23 Changes to Figure 60 through Figure 68 ... 23 Deleted Table 7.. 27 8/08—Rev. 0 to Rev. A Changes to Features Section.. 1 Changes to Table 1, Scale Factor Parameter.. 4 Changes to Theory of Operation Section.. 16 Changes to Figure 54.. 16 Changes to Equation 4 ... 18 Changes to Figure 58.. 21 Added Evaluation Board Section ... 23 Added Figure 60 to Figure 68.. 23 Updated Outline Dimensions ... 28 Changes to Ordering Guide .. 28 9/04—Revision 0: Initial Version Rev. B | Page 2 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION ENABLE SUMMARY PREAMP Noise VGA Optimizing the System Dynamic Range Attenuator Gain Control Output Stage VGA Noise APPLICATIONS INFORMATION ULTRASOUND BASIC CONNECTIONS PREAMP CONNECTIONS INPUT OVERDRIVE Input Overload Protection LOGIC INPUTS COMMON-MODE PINS DRIVING ADCs EVALUATION BOARD BOARD LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE
