link to page 3 link to page 4 link to page 6 link to page 7 link to page 7 link to page 8 link to page 9 link to page 10 link to page 12 link to page 12 link to page 12 link to page 13 link to page 13 link to page 14 link to page 14 link to page 15 link to page 16 link to page 17 link to page 18 link to page 18 link to page 18 link to page 19 link to page 20 link to page 20 link to page 20 link to page 21 link to page 21 AD7940TABLE OF CONTENTS Table of Contents .. 2 Normal Mode .. 13 Specifications ... 3 Power-Down Mode .. 14 Timing Specifications ... 5 Power vs. Throughput Rate ... 15 Absolute Maximum Ratings .. 6 Serial Interface .. 16 ESD Caution .. 6 Microprocessor Interfacing ... 17 Pin Configurations and Function Descriptions ... 7 AD7940 to TMS320C541 .. 17 Terminology .. 8 AD7940 to ADSP-218x .. 17 Typical Performance Characteristics ... 9 AD7940 to DSP563xx .. 18 Circuit Information .. 11 Application Hints ... 19 Converter Operation .. 11 Grounding and Layout .. 19 Analog Input ... 11 Evaluating the AD7940 Performance .. 19 ADC Transfer Function ... 12 Outline Dimensions ... 20 Typical Connection Diagram ... 12 Ordering Guide .. 20 Modes of Operation ... 13 REVISION HISTORY8/11—Rev. 0 to Rev. A Updated Outline Dimensions ... 20 Changes to Ordering Guide .. 20 7/04—Revision 0: Initial Version Document Outline Table of Contents Specifications1F Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Terminology Typical Performance Characteristics Circuit Information Converter Operation Analog Input ADC Transfer Function Typical Connection Diagram Digital Inputs Modes of Operation Normal Mode Power-Down Mode Power vs. Throughput Rate Serial Interface Microprocessor Interfacing AD7940 to TMS320C541 AD7940 to ADSP-218x AD7940 to DSP563xx Application Hints Grounding and Layout Evaluating the AD7940 Performance Outline Dimensions Ordering Guide