Datasheet

AD9042
Rev. B | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
DC Specifications ......................................................................... 3
Switching Specifications .............................................................. 4
AC Specifications .......................................................................... 4
Absolute Maximum Ratings ............................................................ 6
Thermal Resistance ...................................................................... 6
Explanation of Test Levels ........................................................... 6
ESD Caution .................................................................................. 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 11
Equivalent Circuits ......................................................................... 12
Theory of Operation ...................................................................... 13
Encoding the AD9042 ............................................................... 13
Driving the Analog Input .......................................................... 14
Power Supplies ............................................................................ 15
Output Loading .......................................................................... 15
Layout Information .................................................................... 15
Digital Wideband Receivers .......................................................... 16
Introduction ................................................................................ 16
Noise Floor and SNR ................................................................. 18
Processing Gain .......................................................................... 18
Overcoming Static Nonlinearities with Dither ...................... 18
Receiver Example ....................................................................... 19
IF Sampling, Using the AD9042 as a Mix-Down Stage ........ 20
Receive Chain for Digital and Analog Beam Forming Medical
Ultrasound Using the AD9042 ........................................................ 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 22
REVISION HISTORY
9/09—Rev. A to Rev. B
Updated Format .................................................................. Universal
Reorganized Layout ............................................................ Universal
Deleted DH-28 Package ................................................ Throughout
Changes to General Description Section and Product
Highlights Section ............................................................................ 1
Deleted Wafer Test Limits Section ................................................. 4
Deleted Die Layout and Mechanical Information Table and Die
Layout with Pad Labels Figure ........................................................ 6
Changes to Figure 4 .......................................................................... 7
Deleted Figure 7; Renumbered Sequentially ................................. 7
Deleted Figure 15 and Figure 16 ..................................................... 9
Deleted Evaluation Boards Section .............................................. 13
Changes to Layout Information Section ...................................... 16
Removed Evaluation Boards Section ........................................... 18
Changes to Figure 49 and Figure 50 ............................................. 19
Changes to Figure 52 ...................................................................... 20
Changes to Figure 54 ...................................................................... 22
Updated Outline Dimension ......................................................... 24
Changes to Ordering Guide .......................................................... 24
5/96—Rev. 0 to Rev. A
Changes to Specifications Section ................................................... 2
Changes to Switching Specifications Section................................. 2
Changes to AC Specifications Section ............................................ 3
Changes to Ordering Guide ............................................................. 4
Changes to Pin Descriptions Section .............................................. 5
Added Die Layout and Mechanical Information Section ............ 6
Changes to Figure 2, Figure 3, Figure 5, and Figure 6 .................. 7
Changes to Figure 37 ...................................................................... 14
Added Figure 38 ............................................................................. 15
Added Table 2 ................................................................................. 15
Added Figure 43, Figure 44, Figure 45, and Figure 46 .............. 17
Added Figure 47 and Figure 48 .................................................... 18
Changes to Figure 53 ...................................................................... 21
Changes to Figure 54 ...................................................................... 22
Added Receiver Example Section ................................................. 22
Added Multitone Performance Section ....................................... 22
Added Receive Chain for Digital Beam-Forming Medical
Ultrasound Using the AD9042 Section ....................................... 23
Added Figure 58 ............................................................................. 23
10/95—Rev. 0: Initial Version