Rainbow-electronics ADC10D020 Manual do Utilizador

ADC10D020Dual 10-Bit, 20 MSPS, 150 mW A/D ConverterGeneral DescriptionThe ADC10D020 is a dual low power, high performanceCMOS analog-to-digital conver

AC Electrical Characteristics OS = Low (Multiplexed Mode) (Continued)The following specifications apply for VA=VD=VDR= +3.0VDC,VREF= 1.0 VDC, GAIN = O

AC Electrical Characteristics OS = High (Parallel Mode) (Continued)20025506Note 8: Typical figures are at TJ= 25˚C, and represent most likely parametr

Timing Diagrams (Continued)20025507ADC10D020 Timing Diagram for Parallel Mode20025509FIGURE 1. AC Test CircuitADC10D020www.national.com 12

Specification DefinitionsAPERTURE (SAMPLING) DELAY is that time required afterthe fall of the clock input for the sampling switch to open. TheSample/H

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecifiedTypical INL INL vs. Supply Voltage2002551120025512INL vs.

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)Typical DNL DNL vs. Supply Voltage200255172002

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)SNR vs. Supply Voltage@fIN= 1 MHz to 9.5 MHzSN

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)SNR vs. VCM@fIN= 9.5 MHz SNR vs. Temperature@f

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)SINAD & ENOB vs. Clock Duty Cycle@fIN= 4.7

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)Distortion vs. fCLK@fIN= 9.5 MHz Distortion vs

Connection Diagram20025501TOP VIEWOrdering InformationIndustrial Temperature Range(−40˚C ≤ TA≤ +85˚C)NS PackageADC10D020CIVS TQFPADC10D020EVAL Evaluat

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)SFDR vs. Supply Voltage@fIN= 4.7 MHz SFDR vs.

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)SFDR vs. VCM@fIN= 4.7 MHz SFDR vs. Temperature

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)Power Consumption vs. Temperature Spectral Res

Typical Performance Characteristics VA=VD=VDR= 3.0V, fCLK= 20 MHz, unless otherwisespecified (Continued)Spectral Response@fIN= 99 MHz IMD Response@fIN

Applications Information (Continued)2.0 REFERENCE INPUTSThe VRPand VRNpins should each be bypassed witha5µF(or larger) tantalum or electrolytic capaci

Applications Information (Continued)20025571FIGURE 4. Simple Reference BiasingADC10D020www.national.com25

Applications Information (Continued)The VCMOoutput can be used as the ADC reference sourceas long as care is taken to prevent excessive loading of thi

Applications Information (Continued)20025573FIGURE 6. Setting An Accurate Reference VoltageADC10D020www.national.com27

Applications Information (Continued)2.1 REFERENCE VOLTAGEThe reference voltage should be within the range specified inthe Operating Ratings table (0.8

Applications Information (Continued)3.1 CLOCK (CLK) INPUTThe clock (CLK) input is common to both A/D converters.This pin is CMOS/LVTTL compatible with

Block Diagram20025502ADC10D020www.national.com3

Applications Information (Continued)5.0 POWER SUPPLY CONSIDERATIONSA/D converters draw sufficient transient current to corrupttheir own power supplies

Applications Information (Continued)7.0 DYNAMIC PERFORMANCEThe ADC10D020 is ac tested and its dynamic performanceis guaranteed. To meet the published

Physical Dimensions inches (millimeters) unless otherwise noted48-Lead TQFP PackageOrdering Number ADC10D020CIVSNS Package Number VBA48ANOTES UNLESS O

Pin Descriptions and Equivalent CircuitsPin No. Symbol Equivalent Circuit Description4847I+I−Analog inputs to “I” ADC. Nominal conversion range is 1.2

Pin Descriptions and Equivalent Circuits (Continued)Pin No. Symbol Equivalent Circuit Description33 CLKDigital clock input for both converters. The an

Pin Descriptions and Equivalent Circuits (Continued)Pin No. Symbol Equivalent Circuit Description4VDDigital supply pin. This pin should be connected t

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

Converter Electrical Characteristics (Continued)The following specifications apply for VA=VD=VDR= +3.0 VDC,VREF= 1.0 VDC, GAIN = OF = 0V, OS = 3.0V, V

Converter Electrical Characteristics (Continued)The following specifications apply for VA=VD=VDR= +3.0 VDC,VREF= 1.0 VDC, GAIN = OF = 0V, OS = 3.0V, V