link to page 17 AD7687Data SheetABSOLUTE MAXIMUM RATINGS Table 6.THERMAL RESISTANCEParameterRating θJA is specified for the worst-case conditions, that is, a device Analog Inputs soldered in a circuit board for surface-mount packages. IN+1, IN−1 GND − 0.3 V to VDD + 0.3 V or ±130 mA Table 7. Thermal Resistance REF GND − 0.3 V to VDD + 0.3 V Package TypeθJAθJCUnit Supply Voltages 10-Lead LFCSP 84 2.96 °C/W VDD, VIO to GND −0.3 V to +7 V 10-Lead MSOP 200 44 °C/W VDD to VIO ±7 V Digital Inputs to GND −0.3 V to VIO + 0.3 V ESD CAUTION Digital Outputs to GND −0.3 V to VIO + 0.3 V Storage Temperature Range −65°C to +150°C Junction Temperature 150°C Lead Temperature Range JEDEC J-STD-20 1 See the Analog Input section. Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. E | Page 8 of 26 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE SINGLE-TO-DIFFERENTIAL DRIVER VOLTAGE REFERENCE INPUT POWER SUPPLY SUPPLYING THE ADC FROM THE REFERENCE DIGITAL INTERFACE CS\ MODE, 3-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 3-WIRE WITH BUSY INDICATOR CS\ MODE, 4-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 4-WIRE WITH BUSY INDICATOR CHAIN MODE WITHOUT BUSY INDICATOR CHAIN MODE WITH BUSY INDICATOR APPLICATIONS INFORMATION LAYOUT EVALUATING THE PERFORMANCE OF THE AD7687 OUTLINE DIMENSIONS ORDERING GUIDE