Analog Devices AD5522 Evaluation Board EVAL-AD5522EBUZ User Manuals

Table of Contents

• Features

  1
• Applications

  1
• Functional Block Diagram

  1
• Table of Contents

  2
• Revision History

  3
• General Description

  4
• Specifications

  6
  • Timing Characteristics

    11
    • Circuit and Timing Diagrams

      13
• Absolute Maximum Ratings

  15
  • Thermal Resistance

    15
  • ESD Caution

    15
• Pin Configurations and Function Descriptions

  16
• Typical Performance Characteristics

  22
• Terminology

  29
• Theory of Operation

  30
  • Force Amplifier

    30
  • Comparators

    30
  • Clamps

    30
  • Current Range Selection

    31
  • High Current Ranges

    31
  • Measure Current Gains

    32
  • VMID Voltage

    32
  • Choosing Power Supply Rails

    33
  • Measure Output (MEASOUTx Pins)

    33
  • Device Under Test Ground (DUTGND)

    33
  • Guard Amplifier

    34
  • Compensation Capacitors

    34
  • System Force and Sense Switches

    35
  • Temperature Sensor

    35
• DAC Levels

  36
  • Offset DAC

    36
  • Gain and Offset Registers

    36
  • Cached X2 Registers

    37
    • Gain and Offset Registers for the FIN DAC

      37
    • Gain and Offset Registers for the Comparator DACs

      37
    • Gain and Offset Registers for the Clamp DACs

      37
  • Reference Voltage (VREF)

    37
  • Reference Selection

    37
    • Reference Selection Example

      38
  • Calibration

    38
    • Reducing Zero-Scale Error

      38
    • Reducing Gain Error

      38
    • Calibration Example

      39
  • Additional Calibration

    39
  • System Level Calibration

    39
• Circuit Operation

  40
  • Force Voltage (FV) Mode

    40
  • Force Current (FI) Mode

    41
• Serial Interface

  42
  • SPI Interface

    42
  • LVDS Interface

    42
  • Serial Interface Write Mode

    42
  • /RESET Function

    42
  • /BUSY and /LOAD Functions

    42
  • Register Update Rates

    44
  • Register Selection

    44
    • Readback Control, RD/WR

      44
    • PMU Address Bits: PMU3, PMU2, PMU1, PMU0

      44
    • NOP (No Operation)

      44
    • Reserved Commands

      44
  • Write System Control Register

    46
  • Write PMU Register

    48
  • Write DAC Register

    50
    • DAC Addressing

      51
  • Read Registers

    53
  • Readback of System Control Register

    54
  • Readback of PMU Register

    55
  • Readback of Comparator Status Register

    56
  • Readback of Alarm Status Register

    56
  • Readback of DAC Register

    57
• Applications Information

  58
  • Power-On Default

    58
  • Setting Up the Device on Power-On

    58
  • Changing Modes

    59
  • Required External Components

    59
  • Power Supply Decoupling

    60
  • Power Supply Sequencing

    60
  • Typical Application for the AD5522

    60
• Outline Dimensions

  62
  • Ordering Guide

    63