Datasheet AD7785 (Analog Devices) - 2

AD7785* PRODUCT PAGE QUICK LINKS Last Content Update: 02/23/2017 COMPARABLE PARTS TOOLS AND SIMULATIONS
View a parametric search of comparable parts. • AD7785/AD7790/AD7791/AD7792/AD7793/AD7794/ AD7795/AD7796/AD7797/AD7798/AD7799 Digital Filter
EVALUATION KITS
Model • Sigma-Delta ADC Tutorial • AD7785 Evaluation Board
DOCUMENTATION REFERENCE MATERIALS Technical Articles Application Notes
• High-resolution ADCs — an overview • AN-101: Cross Plot Generator Allows Quick A/D Converter Evaluation • MS-2210: Designing Power Supplies for High Speed ADC • AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change
DESIGN RESOURCES
• AN-283: Sigma-Delta ADCs and DACs • AD7785 Material Declaration • AN-311: How to Reliably Protect CMOS Circuits Against • PCN-PDN Information Power Supply Overvoltaging • Quality And Reliability • AN-347: Shielding and Guarding • Symbols and Footprints • AN-388: Using Sigma-Delta Converters-Part 1 • AN-389: Using Sigma-Delta Converters-Part 2
DISCUSSIONS
• AN-397: Electrically Induced Damage to Standard Linear View all AD7785 EngineerZone Discussions. Integrated Circuits: • AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-
SAMPLE AND BUY
Delta ADC Visit the product page to see pricing options. • AN-615: Peak-to-Peak Resolution Versus Effective Resolution
TECHNICAL SUPPORT
• AN-880: ADC Requirements for Temperature Measurement Systems Submit a technical question or find your regional support number. • AN-968: Current Sources: Options and Circuits
Data Sheet DOCUMENT FEEDBACK
• AD7785: 3-Channel, Low Noise, Low Power, 20-Bit Σ-Δ ADC with On-Chip In-Amp and Reference Data Sheet Submit feedback for this data sheet.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS OUTPUT NOISE AND RESOLUTION SPECIFICATIONS EXTERNAL REFERENCE INTERNAL REFERENCE TYPICAL PERFORMANCE CHARACTERISTICS ON-CHIP REGISTERS COMMUNICATIONS REGISTER RS2, RS1, RS0 = 0, 0, 0 STATUS REGISTER RS2, RS1, RS0 = 0, 0, 0; Power-On/Reset = 0x88 MODE REGISTER RS2, RS1, RS0 = 0, 0, 1; Power-On/Reset = 0x000A CONFIGURATION REGISTER RS2, RS1, RS0 = 0, 1, 0; Power-On/Reset = 0x0710 DATA REGISTER RS2, RS1, RS0 = 0, 1, 1; Power-On/Reset = 0x00000F ID REGISTER RS2, RS1, RS0 = 1, 0, 0; Power-On/Reset = 0xXB IO REGISTER RS2, RS1, RS0 = 1, 0, 1; Power-On/Reset = 0x00 OFFSET REGISTER RS2, RS1, RS0 = 1, 1, 0; Power-On/Reset = 0x800000 FULL-SCALE REGISTER RS2, RS1, RS0 = 1, 1, 1; Power-On/Reset = 0x5XXX00 ADC CIRCUIT INFORMATION OVERVIEW DIGITAL INTERFACE Single Conversion Mode Continuous Conversion Mode Continuous Read CIRCUIT DESCRIPTION ANALOG INPUT CHANNEL INSTRUMENTATION AMPLIFIER BIPOLAR/UNIPOLAR CONFIGURATION DATA OUTPUT CODING BURNOUT CURRENTS EXCITATION CURRENTS BIAS VOLTAGE GENERATOR REFERENCE RESET AVDD MONITOR CALIBRATION GROUNDING AND LAYOUT APPLICATIONS INFORMATION TEMPERATURE MEASUREMENT USING A THERMOCOUPLE TEMPERATURE MEASUREMENT USING AN RTD OUTLINE DIMENSIONS ORDERING GUIDE