Datasheet AD9444 (Analog Devices) - 15

AD9444 EQUIVALENT CIRCUITS AVDD2 DRVDD VIN+ AVDD2 2.5pF 1k
Ω
DX 3.5V X1 SHA 1k
Ω 05089-009
AVDD2
Figure 9. Equivalent CMOS Digital Output Circuit
VIN– VDD 2.5pF
05089-006 Figure 6. Equivalent Analog Input Circuit
DRVDD DRVDD DCS MODE, OUTPUT MODE, DFS K 30k
Ω
1.2V LVDSBIAS
05089-010
3.74k
Ω
ILVDSOUT
Figure 10. Equivalent Digital Input Circuit, 05089-007 DFS, DCS MODE, OUTPUT MODE Figure 7. Equivalent LVDS BIAS Circuit
AVDD2 DRVDD 12k
Ω
12k
Ω
CLK+ CLK– V V 150
Ω
150
Ω
DX– DX+ 10k
Ω
10k
Ω
V V
011 05089-008 05089- Figure 8. Equivalent LVDS Digital Output Circuit Figure 11. Equivalent Sample Clock Input Circuit Rev. 0 | Page 14 of 40 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS DC SPECIFICATIONS AC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS EXPLANATION OF TEST LEVELS ABSOLUTE MAXIMUM RATINGS Thermal Resistance ESD CAUTION DEFINITIONS OF SPECIFICATIONS PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS EQUIVALENT CIRCUITS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ANALOG INPUT AND REFERENCE OVERVIEW Internal Reference Connection Internal Reference Trim External Reference Operation Analog Inputs CLOCK INPUT CONSIDERATIONS Jitter Considerations POWER CONSIDERATIONS DIGITAL OUTPUTS LVDS Mode CMOS Mode TIMING OPERATIONAL MODE SELECTION Data Format Select Output Mode Select Duty Cycle Stabilizer EVALUATION BOARD LVDS EVALUATION BOARD SCHEMATICS LVDS MODE EVALUATION BOARD BILL OF MATERIALS (BOM) CMOS EVALUATION BOARD SCHEMATICS CMOS MODE EVALUATION BOARD BILL OF MATERIALS (BOM) OUTLINE DIMENSIONS ORDERING GUIDE