Datasheet AD7912, AD7922 (Analog Devices) - 2

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AD7912/AD7922 TABLE OF CONTENTS
Specifications... 3 DIN Input .. 17 AD7912 Specifications... 3 DOUT Output .. 17 AD7922 Specifications... 5 Modes of Operation ... 18 Timing Specifications .. 7 Normal Mode.. 18 Timing Diagrams.. 7 Power-Down Mode .. 18 Timing Examples.. 8 Power-Up Time .. 20 Absolute Maximum Ratings.. 9 Daisy-Chain Mode ... 20 ESD Caution.. 9 Daisy-Chain Example .. 22 Pin Configurations and Function Descriptions ... 10 Power vs. Throughput Rate ... 24 Terminology .. 11 Serial Interface .. 25 Typical Performance Characteristics ... 13 Microprocessor Interfacing... 26 Circuit Information .. 15 Application Hints ... 28 Converter Operation.. 15 Grounding and Layout .. 28 ADC Transfer Function... 15 Evaluating AD7912/AD7922 Performance... 29 Typical Connection Diagram ... 16 Outline Dimensions ... 30 Analog Input ... 16 Ordering Guide .. 30 Digital Inputs .. 17
REVISION HISTORY
Revision 0: Initial Version Rev. 0 | Page 2 of 32 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS SPECIFICATIONS AD7912 SPECIFICATIONS AD7922 SPECIFICATIONS TIMING SPECIFICATIONS TIMING DIAGRAMS TIMING EXAMPLES Timing Example 1 Timing Example 2 ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT DIGITAL INPUTS DIN INPUT DOUT OUTPUT MODES OF OPERATION NORMAL MODE POWER-DOWN MODE POWER-UP TIME DAISY-CHAIN MODE DAISY-CHAIN EXAMPLE POWER VS. THROUGHPUT RATE SERIAL INTERFACE MICROPROCESSOR INTERFACING AD7912/AD7922 to TMS320C541 Interface AD7912/AD7922 to ADSP-218x AD7912/AD7922 to DSP563xx Interface APPLICATION HINTS GROUNDING AND LAYOUT EVALUATING AD7912/AD7922 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE