Datasheet AD7707 (Analog Devices) - 10

AD7707 ABSOLUTE MAXIMUM RATINGS
T Stresses above those listed under Absolute Maximum Ratings A = +25°C, unless otherwise noted. may cause permanent damage to the device. This is a stress
Table 5.
rating only; functional operation of the device at these or any
Parameter Rating
other conditions above those indicated in the operational AVDD to AGND −0.3 V to +7 V section of this specification is not implied. Exposure to absolute AVDD to DGND −0.3 V to +7 V maximum rating conditions for extended periods may affect DV device reliability. DD to AGND −0.3 V to +7 V DVDD to DGND −0.3 V to +7 V AVDD to DVDD −0.3 V to +7 V
ESD CAUTION
DGND to AGND −0.3 V to +0.3 V AIN1, AIN2 Input Voltage to LOCOM −0.3 V to AVDD + 0.3 V AIN3 Input Voltage to HICOM −11 V to +30 V VBIAS to AGND −0.3 V to AVDD + 0.3 V HICOM, LOCOM to AGND −0.3 V to AVDD + 0.3 V REF IN(+), REF IN(−) to AGND −0.3 V to AVDD + 0.3 V Digital Input Voltage to DGND −0.3 V to DVDD + 0.3 V Digital Output Voltage to DGND −0.3 V to DVDD + 0.3 V Operating Temperature Range Industrial (B Version) −40°C to +85°C Storage Temperature Range −65°C to +150°C Junction Temperature 150°C SOIC Package, Power Dissipation 450 mW θJA Thermal Impedance 75°C/W Lead Temperature, Soldering Reflow 260°C TSSOP Package, Power Dissipation 450 mW θJA Thermal Impedance 139°C/W Lead Temperature, Soldering Reflow 260°C ESD Rating 2.5 kV Rev. B | Page 9 of 52 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT NOISE OUTPUT NOISE FOR LOW LEVEL INPUT CHANNELS (5 V OPERATION) OUTPUT NOISE FOR LOW LEVEL INPUT CHANNELS (3 V OPERATION) OUTPUT NOISE FOR HIGH LEVEL INPUT CHANNEL AIN3 (5 V OPERATION) OUTPUT NOISE FOR HIGH LEVEL INPUT CHANNEL AIN3 (3 V OPERATION) ON-CHIP REGISTERS COMMUNICATIONS REGISTER (RS2, RS1, RS0 = 0, 0, 0) Setup Register (RS2, RS1, RS0 = 0, 0, 1); Power-On/Reset Status: 0x01 Clock Register (RS2, RS1, RS0 = 0, 1, 0); Power-On/Reset Status: 0x05 Data Register (RS2, RS1, RS0 = 0, 1, 1) Test Register (RS2, RS1, RS0 = 1, 0, 0); Power-On/Reset Status: 0x00 Zero-Scale Calibration Register (RS2, RS1, RS0 = 1, 1, 0); Power-On/Reset Status: 0x1F4000 Full-Scale Calibration Register (RS2, RS1, RS0 = 1, 1, 1); Power-On/Reset Status: 0x5761AB CALIBRATION SEQUENCES CIRCUIT DESCRIPTION ANALOG INPUT ANALOG INPUT RANGES INPUT SAMPLE RATE BIPOLAR/UNIPOLAR INPUTS REFERENCE INPUT DIGITAL FILTERING FILTER CHARACTERISTICS POSTFILTERING ANALOG FILTERING CALIBRATION SELF-CALIBRATION SYSTEM CALIBRATION SPAN AND OFFSET LIMITS ON THE LOW LEVEL INPUT CHANNELS, AIN1 AND AIN2 SPAN AND OFFSET LIMITS ON THE HIGH LEVEL INPUT CHANNEL AIN3 POWER-UP AND CALIBRATION USING THE AD7707 CLOCKING AND OSCILLATOR CIRCUIT SYSTEM SYNCHRONIZATION RESET INPUT STANDBY MODE ACCURACY DRIFT CONSIDERATIONS POWER SUPPLIES SUPPLY CURRENT GROUNDING AND LAYOUT DIGITAL INTERFACE CONFIGURING THE AD7707 MICROCOMPUTER/MICROPROCESSOR INTERFACING AD7707 TO 68HC11 INTERFACE AD7707 TO 8XC51 INTERFACE CODE FOR SETTING UP THE AD7707 C CODE FOR INTERFACING AD7707 TO 68HC11 APPLICATIONS INFORMATION DATA ACQUISITION SMART VALVE/ACTUATOR CONTROL PRESSURE MEASUREMENT THERMOCOUPLE MEASUREMENT RTD MEASUREMENT CHART RECORDERS ACCOMMODATING VARIOUS HIGH LEVEL INPUT RANGES TYPICAL INPUT CURRENTS OUTPUT NOISE FOR HIGH LEVEL INPUT CHANNEL, AIN3 5 V OPERATION 3 V OPERATION OUTLINE DIMENSIONS ORDERING GUIDE