Datasheet AD7705, AD7706 (Analog Devices) - 9

AD7705/AD7706 ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Stresses above those listed under Absolute Maximum Ratings
Parameters Ratings
may cause permanent damage to the device. This is a stress VDD to GND −0.3 V to +7 V rating only; functional operation of the device at these or any Analog Input Voltage to GND −0.3 V to VDD + 0.3 V other conditions above those indicated in the operational Reference Input Voltage to GND −0.3 V to VDD + 0.3 V section of this specification is not implied. Exposure to absolute Digital Input Voltage to GND −0.3 V to VDD + 0.3 V maximum rating conditions for extended periods may affect Digital Output Voltage to GND −0.3 V to VDD + 0.3 V device reliability. Operating Temperature Range Commercial (B Version) −40°C to + 85°C Storage Temperature Range −65°C to + 150°C Junction Temperature 150°C PDIP Package, Power Dissipation 450 mW θJA Thermal Impedance 105°C/W Lead Temperature (Soldering, 10 sec) 260°C SOIC Package, Power Dissipation 450 mW θJA Thermal Impedance 75°C/W Lead Temperature, Soldering Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C SSOP Package, Power Dissipation 450 mW θJA Thermal Impedance 139°C/W Lead Temperature, Soldering Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C ESD Rating >4000 V
ESD 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 this product 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. Rev. C | Page 9 of 44 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM REVISION HISTORY PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS OUTPUT NOISE (5 V OPERATION) OUTPUT NOISE (3 V OPERATION) TYPICAL PERFORMANCE CHARACTERISTICS ON-CHIP REGISTERS COMMUNICATION REGISTER (RS2, RS1, RS0 = 0, 0, 0) SETUP REGISTER (RS2, RS1, RS0 = 0, 0, 1); POWER-ON/RESET STATUS: 01 HEXADECIMAL CLOCK REGISTER (RS2, RS1, RS0 = 0, 1, 0); POWER-ON/RESET STATUS: 05 HEXADECIMAL DATA REGISTER (RS2, RS1, RS0 = 0, 1, 1) TEST REGISTER (RS2, RS1, RS0 = 1, 0, 0); POWER-ON/RESET STATUS: 00 HEXADECIMAL ZERO-SCALE CALIBRATION REGISTER (RS2, RS1, RS0 = 1, 1, 0); POWER-ON/RESET STATUS: 1F4000 HEXADECIMAL FULL-SCALE CALIBRATION REGISTER (RS2, RS1, RS0 = 1, 1, 1); POWER-ON/RESET STATUS: 5761AB HEXADECIMAL Calibration Sequences CIRCUIT DESCRIPTION ANALOG INPUT Ranges Sample Rate BIPOLAR/UNIPOLAR INPUT REFERENCE INPUT DIGITAL FILTERING Filter Characteristics Postfiltering ANALOG FILTERING CALIBRATION Self-Calibration System Calibration Span and Offset Limits Power-Up and Calibration THEORY OF OPERATION CLOCKING AND OSCILLATOR CIRCUIT SYSTEM SYNCHRONIZATION RESET INPUT STANDBY MODE ACCURACY DRIFT CONSIDERATIONS POWER SUPPLIES SUPPLY CURRENT GROUNDING AND LAYOUT EVALUATING THE PERFORMANCE DIGITAL INTERFACE CONFIGURING THE AD7705/AD7706 MICROCOMPUTER/MICROPROCESSOR INTERFACING AD7705/AD7706-to-68HC11 Interface AD7705/AD7706-to-8051 Interface AD7705/AD7706-to-ADSP-2103/ADSP-2105 Interface CODE FOR SETTING UP THE AD7705/AD7706 C Code for Interfacing AD7705 to 68HC11 APPLICATIONS PRESSURE MEASUREMENT TEMPERATURE MEASUREMENT SMART TRANSMITTERS BATTERY MONITORING OUTLINE DIMENSIONS ORDERING GUIDE