
AD8362
TABLE OF CONTENTS
Specifications ...................................................................................3
Rev. B | Page 2 of 36
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
Uncertainties in R
IN
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
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