Datasheet AD8331, AD8332, AD8334 (Analog Devices) - 3

Data Sheet AD8331/AD8332/AD8334
Changes to Figure 113 .. 47 Changes to Table 1 .. 4 Changes to Figure 114 and Board Layout Section .. 48 Changes to Table 2 .. 7 Deleted AD8332 Bill of Materials Section and Table 13; Changes to Figure 7 through Figure 9 and Figure 12 ... 12 Renumbered Sequential y .. 48 Changes to Figure 13, Figure 14, Figure 16, and Figure 18 ... 13 Changes to Figure 115 .. 49 Changes to Figure 23 and Figure 24 ... 14 Changes to Figure 116 .. 50 Changes to Figure 25 through Figure 27.. 15 Changes to Figure 117 to Figure 120 .. 51 Changes to Figure 31 and Figure 33 through Figure 36 .. 16 Changes to Figure 121 .. 52 Changes to Figure 37 through Figure 42.. 17 Deleted AD8334 Bill of Materials Section and Table 15; Changes to Figure 43, Figure 44, and Figure 48 .. 18 Renumbered Sequential y .. 54 Changes to Figure 49, Figure 50, and Figure 54 .. 19 Inserted Figure 56 and Figure 57 .. 20
4/2008—Rev. E to Rev. F
Inserted Figure 58, Figure 59, and Figure 61 ... 21 Changed RFB to RIZ Throughout.. 4 Changes to Figure 60 .. 21 Changes to Figure 1... 1 Inserted Figure 63 and Figure 65 .. 22 Changes to Table 1, LNA and VGA Characteristics, Output Changes to Figure 64 .. 22 Offset Voltage, Conditions ... 4 Moved Measurement Considerations Section .. 23 Changes to Quiescent Current per Channel and Power Down Inserted Figure 67 and Figure 68 .. 23 Current Parameters ... 6 Inserted Figure 70 and Figure 71 .. 24 Changes to Table 2 .. 7 Change to Figure 72 .. 24 Changes to Table 3, Pin 1 Description.. 8 Changes to Figure 73 and Low Noise Amplifier Section ... 25 Changes to Table 4, Pin 1 and Pin 28 Descriptions .. 9 Changes to Postamplifier Section ... 28 Changes to Table 5, Pin 4 and Pin 5 Descriptions .. 9 Changes to Figure 80 .. 29 Changes to Table 6, Pin 2, Pin 15, and Pin 20 Descriptions .. 10 Changes to LNA—External Components Section .. 30 Changes to Table 6, Pin 61 Description ... 11 Changes to Logic Inputs—ENB, MODE, and HILO Section ... 31 Changes to Typical Performance Characteristics Section, Changes to Output Decoupling and Overload Sections .. 32 Default Conditions .. 12 Changes to Layout, Grounding, and Bypassing Section .. 33 Changes to Figure 25 .. 15 Changes to Ultrasound TGC Application Section ... 34 Changes to Figure 39 .. 17 Added High Density Quad Layout Section ... 34 Changes to Figure 55 Through Figure 68 ... 20 Inserted Figure 94 ... 38 Changes to Theory of Operation, Overview Section ... 24 Updated Outline Dimensions.. 39 Changes to Low Noise Amplifier Section and Figure 74 ... 25 Changes to Ordering Guide ... 40 Changes to Active Impedance Matching Section, Figure 75, and Figure 77 ... 26
3/2006—Rev. C to Rev. D
Changes to Figure 78 .. 27 Updated Format ... Universal Changes to Equation 6, Table 7, Figure 81, and Figure 82 ... 30 Changes to Features and General Description .. 1 Changes to Figure 83 .. 31 Changes to Table 1 .. 3 Changes to Figure 88 .. 32 Changes to Table 2 .. 6 Switched Figure 89 and Figure 90 ... 33 Changes to Ordering Guide ... 34 Changes to Figure 89 .. 33 Changes to Ultrasound TGC Application Section ... 34
11/2003—Rev. B to Rev. C
Incorporated AD8331-EVAL Data Sheet, Rev. A ... 39 Addition of New Part ... Universal Changes to User-Supplied Optional Components Section Changes to Figures ... Universal and Measurement Setup Section ... 39 Updated Outline Dimensions.. 32 Changes to Figure 95 .. 39 Changes to Figure 97 .. 41
5/2003—Rev. A to Rev. B
Added Figure 98 .. 42 Edits to Ordering Guide ... 32 Incorporated AD8332-EVALZ Data Sheet, Rev. D ... 44 Edits to Ultrasound TGC Application Section ... 25 Incorporated AD8334-EVAL Data Sheet, Rev. 0 .. 49 Added Figure 71, Figure 72, and Figure 73.. 26 Updated Outline Dimensions .. 55 Updated Outline Dimensions.. 31 Changes to Ordering Guide ... 57
2/2003—Rev. 0 to Rev. A 4/2006—Rev. D to Rev. E
Edits to Ordering Guide ... 32 Added AD8334 ... Universal Changes to Figure 1 and Figure 2 .. 1 Rev. I | Page 3 of 55 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS MEASUREMENT CONSIDERATIONS THEORY OF OPERATION OVERVIEW LOW NOISE AMPLIFIER (LNA) Active Impedance Matching LNA Noise VARIABLE GAIN AMPLIFIER X-AMP VGA Gain Control VGA Noise Common-Mode Biasing POSTAMPLIFIER Noise Output Clamping APPLICATIONS INFORMATION LNA—EXTERNAL COMPONENTS Gain Input VCM Input Logic Inputs—ENB, MODE, and HILO Optional Output Voltage Limiting Output Decoupling DRIVING ADCs OVERLOAD OPTIONAL INPUT OVERLOAD PROTECTION LAYOUT, GROUNDING, AND BYPASSING MULTIPLE INPUT MATCHING DISABLING THE LNA ULTRASOUND TGC APPLICATION HIGH DENSITY QUAD LAYOUT AD8331 EVALUATION BOARD GENERAL DESCRIPTION USER-SUPPLIED OPTIONAL COMPONENTS MEASUREMENT SETUP BOARD LAYOUT AD8331 EVALUATION BOARD SCHEMATICS AD8331 EVALUATION BOARD PCB LAYERS AD8332 EVALUATION BOARD GENERAL DESCRIPTION USER-SUPPLIED OPTIONAL COMPONENTS MEASUREMENT SETUP BOARD LAYOUT EVALUATION BOARD SCHEMATICS AD8332 EVALUATION BOARD PCB LAYERS AD8334 EVALUATION BOARD GENERAL DESCRIPTION CONFIGURING THE INPUT IMPEDANCE Driving the VGA from an External Source or Using the LNA to Drive an External Load Using the Clamp Circuit Viewing Signals MEASUREMENT SETUP BOARD LAYOUT EVALUATION BOARD SCHEMATICS AD8334 EVALUATION BOARD PCB LAYERS OUTLINE DIMENSIONS ORDERING GUIDE