AD5522(RevA) Просмотр технического описания (PDF) - Analog Devices

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AD5522
(Rev.:RevA)

Quad Parametric Measurement Unit with Integrated 16-Bit Level Setting DACs

Analog Devices 

AD5522

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 3

General Description ......................................................................... 4

Specifications..................................................................................... 6

Timing Characteristics .............................................................. 11

Absolute Maximum Ratings.......................................................... 15

Thermal Resistance .................................................................... 15

ESD Caution................................................................................ 15

Pin Configurations and Function Descriptions ......................... 16

Typical Performance Characteristics ........................................... 22

Terminology .................................................................................... 28

Theory of Operation ...................................................................... 29

Force Amplifier........................................................................... 29

Comparators................................................................................ 29

Clamps ......................................................................................... 29

Current Range Selection............................................................ 30

High Current Ranges ................................................................. 30

Measure Current Gains.............................................................. 31

VMID Voltage ............................................................................. 31

Choosing Power Supply Rails ................................................... 32

Measure Output (MEASOUTx Pins) ...................................... 32

Device Under Test Ground (DUTGND)................................. 32

Guard Amplifier ......................................................................... 33

Compensation Capacitors ......................................................... 33

System Force and Sense Switches ............................................. 33

Temperature Sensor ................................................................... 33

DAC Levels ...................................................................................... 34

Offset DAC .................................................................................. 34

Gain and Offset Registers.......................................................... 34

Cached X2 Registers................................................................... 35

Reference Voltage (VREF)......................................................... 35

Reference Selection .................................................................... 35

Calibration................................................................................... 36

System Level Calibration........................................................... 37

Circuit Operation ........................................................................... 38

Force Voltage (FV) Mode .......................................................... 38

Force Current (FI) Mode........................................................... 39

Serial Interface ................................................................................ 40

SPI Interface ................................................................................ 40

LVDS Interface............................................................................ 40

Serial Interface Write Mode ...................................................... 40

RESET Function ......................................................................... 40

BUSY and LOAD Functions ..................................................... 40

Register Update Rates ................................................................ 41

Register Selection ....................................................................... 41

Write System Control Register ................................................. 43

Write PMU Register................................................................... 45

Write DAC Register ................................................................... 47

Read Registers............................................................................. 50

Readback of System Control Register...................................... 51

Readback of PMU Register ....................................................... 52

Readback of Comparator Status Register................................ 53

Readback of Alarm Status Register .......................................... 53

Readback of DAC Register........................................................ 54

Applications Information .............................................................. 55

Power-On Default ...................................................................... 55

Setting Up the Device on Power-On ....................................... 55

Changing Modes ........................................................................ 56

Required External Components............................................... 56

Power Supply Decoupling ......................................................... 57

Power Supply Sequencing ......................................................... 57

Typical Application for the AD5522 ........................................ 57

Outline Dimensions ....................................................................... 59

Ordering Guide .......................................................................... 60

Rev. A | Page 2 of 60

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