Datasheet AD7713 (Analog Devices) - 7

AD7713 ABSOLUTE MAXIMUM RATINGS* ORDERING GUIDE
(TA = 25°C, unless otherwise noted.)
Temperature
AVDD to AGND . –0.3 V to +12 V
Model Range Package Option*
AVDD to DGND . –0.3 V to +12 V DV AD7713AN –40°C to +85°C N-24 DD to AGND . –0.3 V to +6 V DV AD7713AR –40°C to +85°C RW-24 DD to DGND . –0.3 V to +6 V AGND to DGND . –0.3 V to +6 V AD7713AR-REEL –40°C to +85°C RW-24 AIN1, AIN2 Input Voltage AD7713AR-REEL7 –40°C to +85°C RW-24 to AGND . –0.3 V to AV AD7713AQ –40°C to +85°C Q-24 DD + 0.3 V AIN3 Input Voltage to AGND . –0.3 V to +22 V AD7713SQ –55°C to +125°C Q-24 Reference Input Voltage to AGND . –0.3 V to AVDD + 0.3 V *N = PDIP; Q = CERDIP; RW = SOIC. Digital Input Voltage to DGND . –0.3 V to AVDD + 0.3 V Digital Output Voltage to DGND . –0.3 V to DVDD + 0.3 V Operating Temperature Range Commercial (A Version) . –40°C to +85°C Extended (S Version) . –55°C to +125°C Storage Temperature Range . –65°C to +150°C Junction Temperature . 150°C PDIP Package, Power Dissipation . 450 mW ␪JAThermal Impedance . 105°C/W Lead Temperature, Soldering (10 sec) . 260°C CERDIP Package, Power Dissipation . 450 mW ␪JAThermal Impedance . 70°C/W Lead Temperature, Soldering . 300°C SOIC Package, Power Dissipation . 450 mW ␪JAThermal Impedance . 75°C/W Lead Temperature, Soldering Vapor Phase (60 sec) . 215°C Infrared (15 secs) . 220°C Power Dissipation (Any Package) to 75°C . 450 mW *Stresses above those listed under Absolute Maximum Ratings may cause perma- nent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
1.6mA TO OUTPUT PIN 2.1V 100pF 200
␮
A
Figure 1. Load Circuit for Access Time and Bus Relinquish Time
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD7713 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. –6– REV. D Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN CONFIGURATION PIN FUNCTION DESCRIPTION TERMINOLOGY Integral Nonlinearity Positive Full-Scale Error Unipolar Offset Error Bipolar Zero Error Bipolar Negative Full-Scale Error Positive Full-Scale Overrange Negative Full-Scale Overrange Offset Calibration Range Full-Scale Calibration Range Input Span CONTROL REGISTER (24 BITS) Filter Selection (FS11 to FS0) CIRCUIT DESCRIPTION THEORY OF OPERATION Input Sample Rate DIGITAL FILTERING Filter Characteristics Post Filtering Antialias Considerations ANALOG INPUT FUNCTIONS Analog Input Ranges Burn Out Current RTD Excitation Currents Bipolar/Unipolar Inputs REFERENCE INPUT USING THE AD7713 SYSTEM DESIGN CONSIDERATIONS Clocking System Synchronization Accuracy Autocalibration Self-Calibration System Calibration System Offset Calibration Background Calibration Span and Offset Limits POWER-UP AND CALIBRATION Drift Considerations POWER SUPPLIES AND GROUNDING DIGITAL INTERFACE Self-Clocking Mode Read Operation Write Operation External Clocking Mode Read Operation Write Operation SIMPLIFYING THE EXTERNAL CLOCKING MODE INTERFACE MICROCOMPUTER/MICROPROCESSOR INTERFACING AD7713 to 8XC51 Interface AD7713 to 68HC11 Interface APPLICATIONS 4-Wire RTD Configurations 3-Wire RTD Configurations 4–20 mA Loop OTHER 24-BIT SIGNAL CONDITIONING ADCS AVAILABLE FROM ANALOG DEVICES AD7710 AD7711 AD7712 OUTLINE DIMENSIONS Revision History