Rainbow-electronics ADC12191 Manual do Utilizador

ADC1219112-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converterwith Internal Sample & HoldGeneral DescriptionThe ADC12191 is a monolithic CMOS an

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

Timing Diagrams10104021FIGURE 3. Data Output TimingADC12191www.national.com11

Timing Diagrams (Continued)Functional DescriptionThe ADC12191 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 TQFP PackageOrdering Number ADC12191CIVTNS Package Number VBE32ALIFE SUPPORT POL

Ordering InformationIndustrial(−40˚C ≤ TA ≤ +85˚C) PackageADC12191CIVT 32 pin TQFPADC12181 EVAL Evaluation BoardSimplified Block Diagram10104002ADC121

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

Transfer CharacteristicsTypical Performance CharacteristicsINL vs Temperature DNL vs Temperature10104011 1010401210104009FIGURE 1. Transfer Characteri

Typical Performance Characteristics (Continued)SNR vs Temperature SINAD vs Temperature10104013 10104014THD vs Temperature101040151010401710104016ADC12