Datasheet AD9218 (Analog Devices) - 13

AD9218 EQUIVALENT CIRCUITS V V D D 30k
Ω
30k
Ω
40k
Ω
40k
Ω
REF A A IN IN 10kΩ 15k
Ω
15k
Ω 0 -006 -01 001 02 02001-B Figure 6. Analog Input Stage Figure 10. Reference Inputs
V V D D 2.6kΩ 600kΩ ENCODE S2
1
10kΩ
1 0 1-
2.6kΩ
00 07 02 0 1- 00 02 Figure 11. S2 Input Figure 7. Encode Inputs
VD VD 10kΩ OUT S1
2 01 08 1- 0 1- 00 02 200 0 Figure 8. Reference Output Stage Figure 12. S1 Input
VD VDD 15kΩ 40kΩ DX DFS/GAIN 15kΩ
9 00 1- 13 00 0 02
V
1-
REF
00 02 Figure 9. Digital Output Stage Figure 13. DFS/Gain Input Rev. C | Page 12 of 28 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS DC SPECIFICATIONS DIGITAL SPECIFICATIONS AC SPECIFICATIONS SWITCHING SPECIFICATIONS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS EXPLANATION OF TEST LEVELS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY EQUIVALENT CIRCUITS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION USING THE AD9218 ENCODE INPUT DIGITAL OUTPUTS ANALOG INPUT VOLTAGE REFERENCE TIMING USER SELECT OPTIONS APPLICATION INFORMATION AD9218/AD9288 CUSTOMER PCB BOM EVALUATION BOARD POWER CONNECTOR ANALOG INPUTS VOLTAGE REFERENCE CLOCKING DATA OUTPUTS DATA FORMAT/GAIN TIMING TROUBLESHOOTING OUTLINE DIMENSIONS ORDERING GUIDE