Datasheet AD7890 (Analog Devices) - 3

AD7890 TABLE OF CONTENTS
Features .. 1 Serial Interface .. 17 General Description ... 1 Self-Clocking Mode ... 17 Functional Block Diagram .. 1 External Clocking Mode ... 18 Product Highlights ... 1 Simplifying the Interface ... 19 Revision History ... 2 Microprocessor/Microcontroller Interface ... 20 Specifications... 3 AD7890 to 8051 Interface ... 20 Timing Specifications .. 5 AD7890 to 68HC11 Interface ... 20 Absolute Maximum Ratings.. 6 AD7890 to ADSP-2101 Interface ... 21 ESD Caution.. 6 AD7890 to DSP56000 Interface ... 21 Pin Configuration and Function Descriptions... 7 AD7890 to TMS320C25/30 Interface.. 21 Terminology .. 9 Antialiasing Filter... 22 Control Register.. 10 Performance .. 23 Theory of Operation .. 11 Linearity... 23 Converter Details.. 11 Noise .. 23 Circuit Description... 11 Dynamic Performance... 24 Track/Hold Amplifier .. 12 Effective Number of Bits ... 24 Reference ... 13 Outline Dimensions ... 25 Timing and Control ... 13 Ordering Guide .. 27 CEXT Functioning... 16
REVISION HISTORY 9/06—Rev. B to Rev. C
Updated Format..Universal Changes to Table 1.. 3 Updated Outline Dimensions ... 25 Changes to Ordering Guide .. 27
2/01—Rev. A to Rev. B
Rev. C | Page 2 of 28 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY CONTROL REGISTER THEORY OF OPERATION CONVERTER DETAILS CIRCUIT DESCRIPTION AD7890-10 Analog Input AD7890-4 Analog Input AD7890-2 Analog Input TRACK/HOLD AMPLIFIER REFERENCE TIMING AND CONTROL CEXT FUNCTIONING SERIAL INTERFACE SELF-CLOCKING MODE Write Operation EXTERNAL CLOCKING MODE Read Operation Write Operation SIMPLIFYING THE INTERFACE MICROPROCESSOR/MICROCONTROLLER INTERFACE AD7890 TO 8051 INTERFACE AD7890 TO 68HC11 INTERFACE AD7890 TO ADSP-2101 INTERFACE AD7890 TO DSP56000 INTERFACE AD7890 TO TMS320C25/30 INTERFACE ANTIALIASING FILTER PERFORMANCE LINEARITY NOISE DYNAMIC PERFORMANCE EFFECTIVE NUMBER OF BITS OUTLINE DIMENSIONS ORDERING GUIDE