Datasheet AD7798, AD7799 (Analog Devices) - 8

AD7798/AD7799 Data Sheet ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted. Stresses above those listed under Absolute Maximum Ratings
Table 3.
may cause permanent damage to the device. This is a stress
Parameter Rating
rating only; functional operation of the device at these or any other conditions above those listed in the operational sections AVDD to GND −0.3 V to +7 V of this specification is not implied. Exposure to absolute DVDD to GND −0.3 V to +7 V maximum rating conditions for extended periods may affect Analog Input Voltage to GND −0.3 V to AVDD + 0.3 V device reliability. Reference Input Voltage to GND −0.3 V to AVDD + 0.3 V Digital Input Voltage to GND −0.3 V to DVDD + 0.3 V Digital Output Voltage to GND −0.3 V to DVDD + 0.3 V
ESD CAUTION
AIN/Digital Input Current 10 mA Operating Temperature Range −40°C to +105°C Storage Temperature Range −65°C to +150°C Maximum Junction Temperature 150°C TSSOP θJA Thermal Impedance 128°C/W θJC Thermal Impedance 14°C/W Lead Temperature, Soldering Reflow 260°C Rev. B | Page 8 of 28 Document Outline Features Interface Applications Functional Block Diagram General Description Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Output Noise and Resolution Specifications AD7798 AD7799 Typical Performance Characteristics On-Chip Registers Communication Register RS2, RS1, RS0 = 0, 0, 0 Status Register RS2, RS1, RS0 = 0, 0, 0; Power-On/Reset = 0x80 (AD7798)/0x88 (AD7799) 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 = 0x0000(00) ID Register RS2, RS1, RS0 = 1, 0, 0; Power-On/Reset = 0xX8 (AD7798)/0xX9 (AD7799) IO Register RS2, RS1, RS0 = 1, 0, 1; Power-On/Reset = 0x00 Offset Register RS2, RS1, RS0 = 1, 1, 0; Power-On/Reset = 0x8000(AD7798)/0x800000 (AD7799) Full-Scale Register RS2, RS1, RS0 = 1, 1, 1; Power-On/Reset = 0x5XXX (AD7798)/0x5XXX00 (AD7799) 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 Reference Reference Detect Reset AVDD Monitor Calibration Grounding and Layout Applications Information Weigh Scales Outline Dimensions Ordering Guide