AD5272/AD5274
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Shift Register............................................................................... 18
Write Operation.......................................................................... 19
Read Operation........................................................................... 20
RDAC Register............................................................................ 21
50-TP Memory Block ................................................................ 21
Write Protection ......................................................................... 21
50-TP Memory Write-Acknowledge Polling.......................... 23
Reset............................................................................................. 23
Resistor Performance Mode...................................................... 23
Shutdown Mode ......................................................................... 23
RDAC Architecture.................................................................... 23
Programming the Variable Resistor......................................... 23
EXT_CAP Capacitor.................................................................. 24
Terminal Voltage Operating Range ......................................... 24
Power-Up Sequence ................................................................... 24
Outline Dimensions....................................................................... 25
Ordering Guide .......................................................................... 25
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—AD5272 .......................................... 3
Electrical Characteristics—AD5274 .......................................... 5
Interface Timing Specifications.................................................. 7
Absolute Maximum Ratings............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution.................................................................................. 9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 11
Test Circuits..................................................................................... 17
Theory of Operation ...................................................................... 18
Serial Data Interface................................................................... 18
REVISION HISTORY
3/13—Rev. C to Rev. D
3/10—Rev. 0 to Rev. A
Changed Resistor Noise Density, RAW = 20 kΩ from 50 nV/√Hz
to 13 nV/√Hz; Table 1...................................................................... 4
Changed Resistor Noise Density, RAW = 20 kΩ from 50 nV/√Hz
to 13 nV/√Hz; Table 4...................................................................... 6
Updated Outline Dimensions....................................................... 25
Changes to Product Title and General Description Section .......1
Changes to Theory of Operation Section.................................... 15
10/09—Revision 0: Initial Version
11/10—Rev. B to Rev. C
Changes to Figure 24...................................................................... 14
5/10—Rev. A to Rev. B
Added LFCSP Package.................................................. Throughout
Changed OTP to 50-TP................................................ Throughout
Changes to Features Section and Applications Section............... 1
Added Endnote 1.............................................................................. 1
Changes to Table 1............................................................................ 3
Added Table 3.................................................................................... 4
Changes to Table 4............................................................................ 5
Added Table 6.................................................................................... 6
Changes to Table 8 and Table 9....................................................... 9
Added Figure 5................................................................................ 10
Added Exposed Pad Note to Table 10.......................................... 10
Changes to Typical Performance Characteristics....................... 11
Changes to Resistor Performance Mode Section ....................... 23
Updated Outline Dimensions....................................................... 25
Changes to Ordering Guide .......................................................... 26
Rev. D | Page 2 of 28
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