Rainbow-electronics ADC12081 Manual do Utilizador

ADC1208112-Bit, 5 MHz Self-Calibrating, Pipelined A/D Converterwith Internal Sample & HoldGeneral DescriptionThe ADC12081 is a monolithic CMOS ana

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

Timing Diagrams10015021FIGURE 3. Data Output TimingADC12081www.national.com11

Timing Diagrams (Continued)Functional DescriptionThe ADC12081 is a monolithic CMOS analog-to-digital con-verter capable of converting analog input sig

Applications Information (Continued)2.2 CALThe level sensitive CAL input must be pulsed high for at leastthree clock cycles to begin ADC calibration.

Applications Information (Continued)5.0 LAYOUT AND GROUNDINGProper grounding and routing of all signals is essential toensure accurate conversion. Sep

Applications Information (Continued)should be avoided as even a little coupling can cause prob-lems at high frequencies. This is because other lines c

Applications Information (Continued)7.0 COMMON APPLICATION PITFALLSDriving the inputs (analog or digital) beyond the powersupply rails. For proper ope

Physical Dimensions inches (millimeters)unless otherwise noted32-Lead LQFP PackageOrdering Number ADC12081CIVTNS Package Number VBE32ALIFE SUPPORT POL

Ordering InformationIndustrial(−40˚C ≤ TA ≤ +85˚C) PackageADC12081CIVT 32 pin LQFPADC12181 EVAL Evaluation BoardSimplified Block Diagram10015002ADC120

Pin Descriptions and Equivalent Circuits #2No. Symbol Equivalent Circuit Description2VINAnalog signal input. With a 2.0V reference voltage,input signa

Pin Descriptions and Equivalent Circuits #2 (Continued)No. Symbol Equivalent Circuit Description14-19,22-27D0 - D11Digital output word, CMOS compatibl

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 CharacteristicsThe following specifications apply for AGND = DGND = DGND I/O = 0V, VA=VD=VDI/O = +5V, PD = +5V, VREF= +2.0V,fC

AC Electrical Characteristics (Continued)Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratin

Typical Performance CharacteristicsINL vs Temperature DNL vs Temperature100150111001501210015009FIGURE 1. Transfer Characteristic10015010FIGURE 2. Err

Typical Performance Characteristics (Continued)SNR vs Temperature SINAD vs Temperature10015013 10015014THD vs Temperature10015015ADC12081www.national.