Datasheet

Data Sheet AD5291/AD5292
TABLE OF CONTENTS
analog.com Rev. G | 2 of 33
Features................................................................ 1
Applications........................................................... 1
Functional Block Diagram......................................1
General Description...............................................1
Specifications........................................................ 3
Electrical Characteristics—AD5291................... 3
Electrical Characteristics—AD5292................... 6
Interface Timing Specifications.......................... 9
Absolute Maximum Ratings ................................ 11
Thermal Resistance..........................................11
ESD Caution.....................................................11
Pin Configuration and Function Descriptions...... 12
Typical Performance Characteristics................... 13
Test Circuits.........................................................22
Theory of Operation.............................................23
Serial Data Interface.........................................23
Shift Register....................................................23
RDAC Register.................................................25
20-TP Memory..................................................25
Write Protection................................................26
Basic Operation................................................26
20-TP Readback and Spare Memory Status ...26
Shutdown Mode............................................... 27
Resistor Performance Mode.............................27
Reset................................................................27
SDO Pin and Daisy-Chain Operation...............27
RDAC Architecture...........................................28
Programming the Variable Resistor..................28
Programming the Potentiometer Divider.......... 28
EXT_CAP Capacitor.........................................29
Terminal Voltage Operating Range.................. 29
Applications Information...................................... 30
High Voltage DAC............................................ 30
Programmable Voltage Source with Boosted
Output.............................................................30
High Accuracy DAC..........................................30
Variable Gain Instrumentation Amplifier........... 30
Audio Volume Control.......................................30
Outline Dimensions............................................. 32
Ordering Guide.................................................32
R
AB
(kΩ) and Resolution Options.....................32
Evaluation Boards............................................ 33
REVISION HISTORY
1/2022—Rev. F to Rev. G
Changes to OTP Store Current Parameter and OTP Read Current Parameter, Table 1.................................3
Changed Electrical Characteristics—AD5291 Section to Electrical Characteristics—AD5292 Section.......... 6
Changes to OTP Store Current Parameter, OTP Read Current Parameter, and Bandwidth Parameter,
Table 4........................................................................................................................................................... 6
Changed Timing Diagrams Section to Shift Register and Timing Diagrams Section.......................................9
Moved Figure 2................................................................................................................................................9
Moved Table 11, Table 12, and Table 13........................................................................................................23
Moved Table 14 and Table 15........................................................................................................................25
Moved Table 16..............................................................................................................................................26
Moved Table 17..............................................................................................................................................27
Change to Rheostat Operation—1% Resistor Tolerance Section..................................................................28