Datasheet AD7927 (Analog Devices) - 3

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AD7927 Data Sheet TABLE OF CONTENTS
Features .. 1 Analog Input Selection .. 17 General Description ... 1 Digital Inputs .. 17 Functional Block Diagram .. 1 VDRIVE .. 18 Product Highlights ... 1 The Reference ... 18 Revision History ... 2 Modes of Operation ... 19 Specifications ... 3 Normal Mode (PM1 = PM0 = 1) ... 19 Timing Specifications .. 5 Full Shutdown (PM1 = 1, PM0 = 0) .. 19 Absolute Maximum Ratings .. 6 Auto Shutdown (PM1 = 0, PM0 = 1) ... 20 ESD Caution .. 6 Powering Up the AD7927 ... 21 Pin Configuration and Function Descriptions ... 7 Power vs. Throughput Rate ... 21 Terminology .. 8 Serial Interface .. 22 Typical Performance Characteristics ... 10 Writing Between Conversions .. 22 Control Register .. 12 Microprocessor Interfacing ... 24 Sequencer Operation .. 13 AD7927 to TMS320C541 .. 24 Shadow Register .. 14 AD7927 to ADSP-21xx .. 24 Circuit Information .. 15 AD7927 to DSP563xx .. 25 Converter Operation .. 15 Application Hints ... 26 Analog Input ... 15 Grounding and Layout .. 26 ADC Transfer Function ... 16 Outline Dimensions ... 27 Handling Bipolar Input Signals .. 16 Ordering Guide .. 27 Typical Connection Diagram .. 17 Automotive Products ... 27
REVISION HISTORY 6/13—Rev. C to Rev. D 12/08—Rev. A to Rev. B
Deleted Evaluating the AD7927 Performance Section .. 26 Changes to ESD Parameter, Table 3 .. 6 Changes to Ordering Guide .. 27 Changes to Ordering Guide .. 27
12/11—Rev. B to Rev. C 1/07—Rev. 0 to Rev. A
Changes to Features Section.. 1 Updated Format .. Universal Changes to Table 1 .. 3 Updated Layout ... 8 Changes to Table 3 .. 6 Updated Layout .. 10 Changes to Ordering Guide, Added Automotive Products Changes to Figure 12 Caption .. 14 Section .. 27 Changes to Figure 13 Caption .. 15 Changes to Ordering Guide .. 27
1/03—Revision 0: Initial Version
Rev. D | Page 2 of 28 Document Outline Features General Description Functional Block Diagram Product Highlights Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Terminology Typical Performance Characteristics Control Register Sequencer Operation Shadow Register Circuit Information Converter Operation Analog Input ADC Transfer Function Handling Bipolar Input Signals Typical Connection Diagram Analog Input Selection Digital Inputs VDRIVE The Reference Modes of Operation Normal Mode (PM1 = PM0 = 1) Full Shutdown (PM1 = 1, PM0 = 0) Auto Shutdown (PM1 = 0, PM0 = 1) Powering Up the AD7927 Power vs. Throughput Rate Serial Interface Writing Between Conversions Microprocessor Interfacing AD7927 to TMS320C541 AD7927 to ADSP-21xx AD7927 to DSP563xx Application Hints Grounding and Layout Outline Dimensions Ordering Guide Automotive Products