AD8362
TABLE OF CONTENTS
Specifications ................................................................................... 3
Uncertainties in RIN and Power Calibration............................ 24
Choosing the Right Value for CHPF and CLPF..................... 24
Use of Nonstandard Target Voltages........................................ 24
Adjusting the Intercept.............................................................. 25
Altering the Slope....................................................................... 25
Envelope Elimination Mode ..................................................... 26
Operator in Controller Modes .................................................... 27
Use of an Input Balun ................................................................ 27
General Applications .................................................................... 29
RMS Voltmeter with >100 dB Dynamic Range...................... 29
RF Power Meter with 80 dB Range.......................................... 30
High Slope Detectors Centered on a Narrow Window......... 31
AD8362 Evaluation Board ........................................................ 32
Outline Dimensions...................................................................... 34
Ordering Guide .......................................................................... 34
REVISION HISTORY
Absolute Maximum Ratings .......................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Description............................. 7
Equivalent Circuits.......................................................................... 8
Typical Performance Characteristics............................................ 9
Characterization Setup .................................................................14
Equipment ................................................................................... 14
Analysis........................................................................................ 14
Circuit Description........................................................................15
Square-Law Detection ............................................................... 15
Effect of Input Coupling on the Intercept Value.................... 16
Offset Elimination...................................................................... 16
Voltage vs. Power Calibration ................................................... 17
Effect of Signal Waveform......................................................... 17
Operation at Low Frequencies.................................................. 17
Time-Domain Response of the Closed Loop ......................... 17
Alteration of the Internal Target Voltage................................. 18
Effects at Each End of Dynamic Range................................... 18
Input Protection.......................................................................... 19
Power-Enable Response Time .................................................. 19
Using the AD8362.........................................................................20
Basic Connections...................................................................... 20
Main Modes of Operation............................................................21
Operation in Measurement Modes.............................................22
Law Conformance Error............................................................ 22
Alternative Input Coupling Means .......................................... 23
Using a Narrow-Band Input Match ......................................... 23
3/04—Data Sheet Changed from Rev. A to Rev. B.
Updated Format.................................................................Universal
Changes to Specifications............................................................... 3
Changes to the Offset Elimination Section................................ 16
Changes to the Operation at Low Frequencies Section............ 17
Changes to the Time-Domain Response of the Closed Loop
Section............................................................................................. 17
Changes to Equation 13................................................................ 24
Changes to Table 5......................................................................... 31
6/03—Data Sheet Changed from Rev. 0 to Rev. A.
Updated Ordering Guide................................................................ 5
Change to Analysis Section.......................................................... 12
Updated AD8362 Evaluation Board Section ............................. 26
2/03—Revision 0: Initial Version
Rev. B | Page 2 of 36
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