Datasheet AD7933, AD7934 (Analog Devices) - 2

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AD7933/AD7934 TABLE OF CONTENTS
Features .. 1 Converter Operation.. 17 Functional Block Diagram .. 1 ADC Transfer Function... 17 General Description ... 1 Typical Connection Diagram ... 18 Product Highlights ... 1 Analog Input Structure.. 18 Revision History ... 2 Analog Inputs ... 19 Specifications... 3 Analog Input Selection .. 21 AD7933 Specifications... 3 Reference ... 22 AD7934 Specifications... 5 Parallel Interface... 23 Timing Specifications .. 7 Power Modes of Operation ... 26 Absolute Maximum Ratings.. 8 Power vs. Throughput Rate... 27 ESD Caution.. 8 Microprocessor Interfacing... 27 Pin Configuration and Function Descriptions... 9 Application Hints ... 29 Typical Performance Characteristics ... 11 Grounding and Layout .. 29 Terminology .. 13 Evaluating the AD7933/AD7934 Performance.. 29 Control Register.. 15 Outline Dimensions ... 30 Sequencer Operation ... 16 Ordering Guide .. 30 Circuit Information .. 17
REVISION HISTORY 2/07—Rev. A to Rev B
Changes to Timing Specifications .. 7 Changes to Figure 13.. 12
12/05—Rev. 0 to Rev. A
Replaced Figures ...Universal Changes to General Description .. 1 Changes to Product Highlights... 1 Added Table 1.. 1 Changes to Specifications Section .. 3 Changes to Table 5.. 9 Changes to Terminology Section.. 13 Changes to Control Register Section ... 15 Changes to Circuit Information Section ... 17 Changes to Application Hints Section ... 29
1/05—Revision 0: Initial Version
Rev. B | Page 2 of 32 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS AD7933 SPECIFICATIONS AD7934 SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY CONTROL REGISTER SEQUENCER OPERATION Writing to the Control Register to Program the Sequencer CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT STRUCTURE ANALOG INPUTS Single-Ended Mode Differential Mode Driving Differential Inputs Using an Op Amp Pair Pseudo Differential Mode ANALOG INPUT SELECTION Traditional Multichannel Operation (SEQ0 = SEQ1 = 0) Using the Sequencer: Consecutive Sequence (SEQ0 = 1, SEQ1 = 1) REFERENCE Digital Inputs VDRIVE Input PARALLEL INTERFACE Reading Data from the AD7933/AD7934 Writing Data to the AD7933/AD7934 POWER MODES OF OPERATION Normal Mode (PM1 = PM0 = 0) Autoshutdown (PM1 = 0; PM0 = 1) Autostandby (PM1 = 1; PM0 = 0) Full Shutdown Mode (PM1 = 1; PM0 = 1) POWER vs. THROUGHPUT RATE MICROPROCESSOR INTERFACING AD7933/AD7934 to ADSP-21xx Interface AD7933/AD7934 to ADSP-21065L Interface AD7933/AD7934 to TMS32020, TMS320C25, and TMS320C5x Interface AD7933/AD7934 to 80C186 Interface APPLICATION HINTS GROUNDING AND LAYOUT EVALUATING THE AD7933/AD7934 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE