Datasheet AD9280 (Analog Devices) - 6

AD9280 PIN CONFIGURATION 28-Lead Wide Body (SSOP) AVSS 1 28 AVDD DRVDD 2 27 AIN
DNC
3 26 VREF
DNC
4 25 REFBS D0 5 24 AD9280 REFBF D1 6 TOP VIEW 23 MODE D2 7 (Not to Scale) 22 REFTF D3 8 21 REFTS D4 9 20 CLAMPIN D5 10 19 CLAMP D6 11 18 REFSENSE D7 12 17 STBY OTR 13 16 THREE-STATE DRVSS 14 15 CLK 'NC = DO NOT CONNECT PIN FUNCTION DESCRIPTIONS SSOP Pin No. Name Description
1 AVSS Analog Ground 2 DRVDD Digital Driver Supply 3 DNC Do Not Connect 4 DNC Do Not Connect 5 D0 Bit 0 6 D1 Bit 1 7 D2 Bit 2 8 D3 Bit 3 9 D4 Bit 4 10 D5 Bit 5 11 D6 Bit 6 12 D7 Bit 7, Most Significant Bit 13 OTR Out-of-Range Indicator 14 DRVSS Digital Ground 15 CLK Clock Input 16 THREE-STATE HI: High Impedance State. LO: Normal Operation 17 STBY HI: Power-Down Mode. LO: Normal Operation 18 REFSENSE Reference Select 19 CLAMP HI: Enable Clamp Mode. LO: No Clamp 20 CLAMPIN Clamp Reference Input 21 REFTS Top Reference 22 REFTF Top Reference Decoupling 23 MODE Mode Select 24 REFBF Bottom Reference Decoupling 25 REFBS Bottom Reference 26 VREF Internal Reference Output 27 AIN Analog Input 28 AVDD Analog Supply REV. E –5– Document Outline FEATURES PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM AD9280-SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS DEFINITIONS OF SPECIFICATIONS TYPICAL CHARACTERIZATION CURVES APPLYING THE AD9280 Theory of Operation Operational Modes Summary of Modes Voltage Reference Reference Buffer Analog Input Special Input and Reference Overview REFERENCE OPERATION Internal Reference Operation External Reference Operation STANDBY OPERATION CLAMP OPERATION Clamp Circuit Example DRIVING THE ANALOG INPUT DIFFERENTIAL INPUT OPERATION AD876-8 MODE OF OPERATION CLOCK INPUT DIGITAL INPUTS AND OUTPUTS APPLICATIONS Direct IF Down Conversion Using the AD9280 Grounding and Layout Rules Digital Outputs Three-State Outputs OUTLINE DIMENSIONS Ordering Guide REVISION HISTORY