Datasheet AD420 (Analog Devices) - 2

link to page 1 link to page 1 link to page 1 link to page 1 link to page 2 link to page 3 link to page 5 link to page 5 link to page 6 link to page 7 link to page 7 link to page 7 link to page 7 link to page 8 link to page 9 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 11 link to page 11 link to page 11 link to page 12 link to page 12 link to page 12 link to page 13 link to page 14 link to page 14 link to page 14 link to page 14 link to page 15 link to page 15
AD420 Data Sheet TABLE OF CONTENTS
Features .. 1 Driving Inductive Loads .. 10 Functional Block Diagram .. 1 Voltage-Mode Output .. 10 General Description ... 1 Optional Span and Zero Trim .. 10 Product Highlights ... 1 Three-Wire Interface ... 11 Revision History ... 2 Using Multiple DACS with Fault Detect ... 11 Specifications ... 3 Asynchronous Interface Using Optocouplers .. 11 Absolute Maximum Ratings .. 5 Microprocessor Interface... 12 ESD Caution .. 5 AD420-To-MC68HC11 (SPI Bus) Interface ... 12 Pin Configuration and Function Descriptions ... 6 AD420 to Microwire Interface ... 12 Timing Requirements .. 7 External Boost Function.. 13 Three-Wire Interface ... 7 AD420 Protection ... 14 Three-Wire Interface Fast Edges on Digital Input ... 7 Transient Voltage Protection .. 14 Asynchronous Interface ... 7 Board Layout And Grounding ... 14 Terminology .. 8 Power Supplies and Decoupling ... 14 Theory of Operation .. 9 Outline Dimensions ... 15 Applications Information .. 10 Ordering Guide .. 15 Current Output ... 10
REVISION HISTORY 3/15—Rev. H to Rev. I
Changes to Three-Wire Interface Fast Edges on Digital Input Section .. 7
1/11—Rev. G to Rev. H
Changes to Figure 13 .. 13 Changes to Ordering Guide .. 15
11/09—Rev. F to Rev. G
Updated Format .. Universal Changes to Table 2 .. 5 Updated Outline Dimensions ... 15 Changes to Ordering Guide .. 15
9/99—Rev. E to Rev. F
Rev. I | Page 2 of 16 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TIMING REQUIREMENTS THREE-WIRE INTERFACE THREE-WIRE INTERFACE FAST EDGES ON DIGITAL INPUT ASYNCHRONOUS INTERFACE TERMINOLOGY THEORY OF OPERATION APPLICATIONS INFORMATION CURRENT OUTPUT DRIVING INDUCTIVE LOADS VOLTAGE-MODE OUTPUT OPTIONAL SPAN AND ZERO TRIM THREE-WIRE INTERFACE USING MULTIPLE DACS WITH FAULT DETECT ASYNCHRONOUS INTERFACE USING OPTOCOUPLERS MICROPROCESSOR INTERFACE AD420-TO-MC68HC11 (SPI BUS) INTERFACE AD420 TO MICROWIRE INTERFACE EXTERNAL BOOST FUNCTION AD420 PROTECTION TRANSIENT VOLTAGE PROTECTION BOARD LAYOUT AND GROUNDING POWER SUPPLIES AND DECOUPLING OUTLINE DIMENSIONS ORDERING GUIDE