Datasheet AD7643 (Analog Devices) - 3

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AD7643 TABLE OF CONTENTS
Features .. 1 Multiplexed Inputs ... 17 Applications... 1 Driver Amplifier Choice ... 18 General Description ... 1 Voltage Reference Input .. 18 Functional Block Diagram .. 1 Power Supply... 20 Product Highlights ... 1 Conversion Control ... 20 Revision History ... 2 Interfaces.. 21 Specifications... 3 Digital Interface.. 21 Timing Specifications... 5 Parallel Interface... 21 Absolute Maximum Ratings.. 7 Serial interface .. 22 ESD Caution.. 7 Master Serial Interface... 22 Pin Configuration and Function Descriptions... 8 Slave Serial Interface .. 24 Terminology .. 11 Microprocessor Interfacing... 26 Typical Performance Characteristics ... 12 Application Hints ... 27 Applications Information .. 15 Layout .. 27 Circuit Information.. 15 Evaluating the AD7643 Performance .. 27 Converter Operation.. 15 Outline Dimensions ... 28 Transfer Functions.. 16 Ordering Guide .. 28 Typical Connection Diagram.. 17 Analog Inputs.. 17
REVISION HISTORY 4/06—Revision 0: Initial Version
Rev. 0 | Page 2 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION CIRCUIT INFORMATION CONVERTER OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS MULTIPLEXED INPUTS DRIVER AMPLIFIER CHOICE Single-to-Differential Driver VOLTAGE REFERENCE INPUT Internal Reference (PDBUF = Low, PDREF = Low) External 1.2 V Reference and Internal Buffer (PDBUF = Low, PDREF = High) External 2.5 V Reference (PDBUF = High, PDREF = High) Reference Decoupling Temperature Sensor POWER SUPPLY Power Sequencing Power-Up CONVERSION CONTROL INTERFACES DIGITAL INTERFACE RESET PARALLEL INTERFACE Master Parallel Interface Slave Parallel Interface 16-Bit and 8-Bit Interface (Master or Slave) SERIAL INTERFACE MASTER SERIAL INTERFACE Internal Clock SLAVE SERIAL INTERFACE External Clock External Discontinuous Clock Data Read After Conversion External Clock Data Read During Previous Conversion MICROPROCESSOR INTERFACING SPI Interface (ADSP-219x) APPLICATION HINTS LAYOUT EVALUATING THE AD7643 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE