Datasheet AD7764 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC with On-Chip Buffers and Serial Interface |
| Pages / Page | 34 / 3 — AD7764. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 3/2017—Rev. A to … |
| Revision | C |
| File Format / Size | PDF / 936 Kb |
| Document Language | English |
AD7764. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 3/2017—Rev. A to Rev. B. 11/2009—Rev. 0 to Rev. A
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AD7764 Data Sheet TABLE OF CONTENTS
Features .. 1 Synchronization .. 24 Applications ... 1 Overrange Alerts .. 24 Functional Block Diagram .. 1 Power Modes ... 25 General Description ... 1 Decimation Rate Pin .. 25 Revision History ... 2 Daisy-Chaining ... 26 Specifications ... 3 Reading Data in Daisy-Chain Mode.. 26 Timing Specifications .. 6 Writing Data in Daisy-Chain Mode .. 27 Absolute Maximum Ratings .. 8 Clocking the AD7764 .. 28 ESD Caution .. 8 MCLK Jitter Requirements ... 28 Pin Configuration and Function Descriptions ... 9 Decoupling and Layout Information ... 29 Typical Performance Characteristics ... 11 Supply Decoupling ... 29 Terminology .. 15 Reference Voltage Filtering ... 29 Theory of Operation .. 16 Differential Amplifier Components .. 29 Σ-Δ Modulation and Digital Filtering ... 16 Layout Considerations ... 29 AD7764 Antialias Protection .. 19 Using the AD7764 .. 30 Input Structure .. 20 Bias Resistor Selection ... 30 On-Chip Differential Amplifier ... 21 AD7764 Registers ... 31 Modulator Input Structure .. 22 Control Register ... 31 Driving the Modulator Inputs Directly ... 22 Status Register ... 31 AD7764 Serial Interface ... 23 Gain Register—Address 0x0004 ... 32 Reading Data ... 23 Overrange Register—Address 0x0005 ... 32 Reading Status and Other Registers ... 23 Outline Dimensions ... 33 Writing to the AD7764 .. 23 Ordering Guide .. 33 Functionality ... 24
REVISION HISTORY 3/2017—Rev. A to Rev. B
Changes to Table 15 ... 26 Changes to Features Section and General Description Section ... 1 Changes to Table 17, Table 18, and Table 19 ... 31 Changes to Table 2 .. 3
Changes to Table 3 .. 6
11/2009—Rev. 0 to Rev. A
Change to Figure 3 Caption and Figure 4 Caption .. 7 Changes to Table 2 ... 4 Changes to Table 4 .. 8 Changes to Table 3 ... 6 Changes to Table 5 .. 9
Changes to Table 4 ... 8 Added Figure 29; Renumbered Sequentially .. 14 Changes to Typical Performance Characteristics Section, Changes to Terminology Section.. 15 Introductory Text ... 11 Changes to Σ-Δ Modulation and Digital Filtering Section Changes to Σ-Δ Modulation and Digital Filtering Section ... 16 and Table 6 ... 16 Added AD7764 Antialias Protection Section ... 17 Added Figure 34 .. 17 Changes to Figure 35 .. 19 Change to Table 7 ... 17 Added Driving the Modulator Inputs Directly Section, Including Added Table 8 and Table 9 .. 18 Figure 39 and Figure 40, Renumbered Subsequent Figures ... 20 Changes to On-Chip Differential Amplifier Section Changes to Synchronization Section, Added Figure 41 .. 22 and Table 10 ... 21 Changes to Power Modes Section, Added Figure 44 ... 23 Changes to AD7764 Serial Interface Section Title and Reading Changes to Example 2 Section .. 26 Data Section .. 23 Changes to Using the AD7764 Section.. 28 Changes to Functionality Section Title .. 24
Changes to Table 14 .. 25
6/2007—Revision 0: Initial Version
Rev. B | Page 2 of 33 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION Σ-Δ MODULATION AND DIGITAL FILTERING AD7764 ANTIALIAS PROTECTION INPUT STRUCTURE ON-CHIP DIFFERENTIAL AMPLIFIER MODULATOR INPUT STRUCTURE DRIVING THE MODULATOR INPUTS DIRECTLY AD7764 SERIAL INTERFACE READING DATA READING STATUS AND OTHER REGISTERS WRITING TO THE AD7764 FUNCTIONALITY SYNCHRONIZATION OVERRANGE ALERTS POWER MODES Low Power Mode RESETB/PWRDWNB Mode DECIMATION RATE PIN DAISY-CHAINING READING DATA IN DAISY-CHAIN MODE WRITING DATA IN DAISY-CHAIN MODE CLOCKING THE AD7764 MCLK JITTER REQUIREMENTS Example 1 Example 2 DECOUPLING AND LAYOUT INFORMATION SUPPLY DECOUPLING REFERENCE VOLTAGE FILTERING DIFFERENTIAL AMPLIFIER COMPONENTS LAYOUT CONSIDERATIONS USING THE AD7764 BIAS RESISTOR SELECTION AD7764 REGISTERS CONTROL REGISTER STATUS REGISTER GAIN REGISTER—ADDRESS 0x0004 Nonbit Mapped, Default Value: 0xA000 OVERRANGE REGISTER—ADDRESS 0x0005 Nonbit Mapped, Default Value: 0xCCCC OUTLINE DIMENSIONS ORDERING GUIDE
AD7764 Data Sheet TABLE OF CONTENTS
Features .. 1 Synchronization .. 24 Applications ... 1 Overrange Alerts .. 24 Functional Block Diagram .. 1 Power Modes ... 25 General Description ... 1 Decimation Rate Pin .. 25 Revision History ... 2 Daisy-Chaining ... 26 Specifications ... 3 Reading Data in Daisy-Chain Mode.. 26 Timing Specifications .. 6 Writing Data in Daisy-Chain Mode .. 27 Absolute Maximum Ratings .. 8 Clocking the AD7764 .. 28 ESD Caution .. 8 MCLK Jitter Requirements ... 28 Pin Configuration and Function Descriptions ... 9 Decoupling and Layout Information ... 29 Typical Performance Characteristics ... 11 Supply Decoupling ... 29 Terminology .. 15 Reference Voltage Filtering ... 29 Theory of Operation .. 16 Differential Amplifier Components .. 29 Σ-Δ Modulation and Digital Filtering ... 16 Layout Considerations ... 29 AD7764 Antialias Protection .. 19 Using the AD7764 .. 30 Input Structure .. 20 Bias Resistor Selection ... 30 On-Chip Differential Amplifier ... 21 AD7764 Registers ... 31 Modulator Input Structure .. 22 Control Register ... 31 Driving the Modulator Inputs Directly ... 22 Status Register ... 31 AD7764 Serial Interface ... 23 Gain Register—Address 0x0004 ... 32 Reading Data ... 23 Overrange Register—Address 0x0005 ... 32 Reading Status and Other Registers ... 23 Outline Dimensions ... 33 Writing to the AD7764 .. 23 Ordering Guide .. 33 Functionality ... 24
REVISION HISTORY 3/2017—Rev. A to Rev. B
Changes to Table 15 ... 26 Changes to Features Section and General Description Section ... 1 Changes to Table 17, Table 18, and Table 19 ... 31 Changes to Table 2 .. 3
Changes to Table 3 .. 6
11/2009—Rev. 0 to Rev. A
Change to Figure 3 Caption and Figure 4 Caption .. 7 Changes to Table 2 ... 4 Changes to Table 4 .. 8 Changes to Table 3 ... 6 Changes to Table 5 .. 9
Changes to Table 4 ... 8 Added Figure 29; Renumbered Sequentially .. 14 Changes to Typical Performance Characteristics Section, Changes to Terminology Section.. 15 Introductory Text ... 11 Changes to Σ-Δ Modulation and Digital Filtering Section Changes to Σ-Δ Modulation and Digital Filtering Section ... 16 and Table 6 ... 16 Added AD7764 Antialias Protection Section ... 17 Added Figure 34 .. 17 Changes to Figure 35 .. 19 Change to Table 7 ... 17 Added Driving the Modulator Inputs Directly Section, Including Added Table 8 and Table 9 .. 18 Figure 39 and Figure 40, Renumbered Subsequent Figures ... 20 Changes to On-Chip Differential Amplifier Section Changes to Synchronization Section, Added Figure 41 .. 22 and Table 10 ... 21 Changes to Power Modes Section, Added Figure 44 ... 23 Changes to AD7764 Serial Interface Section Title and Reading Changes to Example 2 Section .. 26 Data Section .. 23 Changes to Using the AD7764 Section.. 28 Changes to Functionality Section Title .. 24
Changes to Table 14 .. 25
6/2007—Revision 0: Initial Version
Rev. B | Page 2 of 33 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION Σ-Δ MODULATION AND DIGITAL FILTERING AD7764 ANTIALIAS PROTECTION INPUT STRUCTURE ON-CHIP DIFFERENTIAL AMPLIFIER MODULATOR INPUT STRUCTURE DRIVING THE MODULATOR INPUTS DIRECTLY AD7764 SERIAL INTERFACE READING DATA READING STATUS AND OTHER REGISTERS WRITING TO THE AD7764 FUNCTIONALITY SYNCHRONIZATION OVERRANGE ALERTS POWER MODES Low Power Mode RESETB/PWRDWNB Mode DECIMATION RATE PIN DAISY-CHAINING READING DATA IN DAISY-CHAIN MODE WRITING DATA IN DAISY-CHAIN MODE CLOCKING THE AD7764 MCLK JITTER REQUIREMENTS Example 1 Example 2 DECOUPLING AND LAYOUT INFORMATION SUPPLY DECOUPLING REFERENCE VOLTAGE FILTERING DIFFERENTIAL AMPLIFIER COMPONENTS LAYOUT CONSIDERATIONS USING THE AD7764 BIAS RESISTOR SELECTION AD7764 REGISTERS CONTROL REGISTER STATUS REGISTER GAIN REGISTER—ADDRESS 0x0004 Nonbit Mapped, Default Value: 0xA000 OVERRANGE REGISTER—ADDRESS 0x0005 Nonbit Mapped, Default Value: 0xCCCC OUTLINE DIMENSIONS ORDERING GUIDE
