Rainbow-electronics ADC12281 User Manual

ADC1228112-Bit, 20 MSPS Single-Ended Input, Pipelined A/DConverterGeneral DescriptionThe ADC12281 is a monolithic CMOS analog-to-digital con-verter ca

Typical Performance Characteristics (VA=VD=VDI/O = 5V, fCLK= 20 MHz, unless otherwisestated)DNL DNL vs VA1010271610102717DNL vs Temperature DNL vs fCL

Typical Performance Characteristics (VA=VD=VDI/O = 5V, fCLK= 20 MHz, unless otherwisestated) (Continued)INL vs Temperature INL vs fCLK1010272210102723

Specification DefinitionsAPERTURE JITTER is the variation in aperture delay fromsample to sample. Aperture jitter shows up as input noise.APERTURE DEL

Applications Information (Continued)analog ground plane. The ground return for the referencevoltage should enter the ground plane at the same point as

Applications Information (Continued)3.0 OUTPUTSThe ADC12281 has three analog outputs: reference outputvoltages VRN,VRM, and VRP. There are 14 digital

Applications Information (Continued)6.0 COMMON APPLICATION PITFALLSDriving the inputs (analog or digital) beyond the powersupply rails. For proper ope

Physical Dimensions inches (millimeters)unless otherwise noted32-Lead TQFP PackageOrder Number ADC12281CIVTNS Package Number VBE32ALIFE SUPPORT POLICY

Ordering InformationIndustrial (−40˚C ≤ TA≤ +85˚C) PackageADC12281CIVT 32-Pin TQFPSimplified Block Diagram10102702Pin Descriptions and Equivalent Circ

Pin Descriptions and Equivalent Circuits (Continued)Pin Symbol Equivalent Circuit Description32 VRPPositive reference bypass pin. Bypass with a 0.1 µF

Pin Descriptions and Equivalent Circuits (Continued)Pin Symbol Equivalent Circuit Description3VIN COMAnalog input common. Connect to a quiet point ina

Absolute Maximum Ratings (Notes 1,2)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distri

DC and Logic Electrical Characteristics (Continued)The following specifications apply for AGND = DGND = DGND I/O = 0V, VA=VD=VDI/O = +5V, PD = +5V, VR

AC Electrical Characteristics (Continued)Note 4: The absolute maximum junction temperature (TJMAX) for this device is 150˚C. The maximum allowable pow

Transfer Characteristics (Continued)Timing Diagrams10102710FIGURE 2. Errors Reduced after Auto-Cal Cycle10102711Data Output Timing10102712Data Output

Timing Diagrams (Continued)10102714Calibration Request Cycle10102715Power Down Request CycleFIGURE 4. Reset and Calibration TimingADC12281www.national