Rainbow-electronics ADC1175 Manual do Utilizador

ADC11758-Bit, 20MHz, 60mW A/D ConverterGeneral DescriptionThe ADC1175 is a low power, 20 Msps analog-to-digitalconverter that digitizes signals to 8 b

Typical Performance Characteristics (Continued)Differential Phase vs Temperature Spectral Response at fCLK= 20 MSPS1000922710009228Specification Defin

Timing Diagram10009211FIGURE 1. ADC1175 Timing Diagram10009212FIGURE 2. tEN,tDISTest CircuitADC1175www.national.com11

Functional DescriptionThe ADC1175 uses a new, unique architecture to achieve7.2 effective bits at and maintains superior dynamic perfor-mance up to1⁄2

Applications Information (Continued)10009213FIGURE 3. Simple, Low Component Count, Self -Bias Reference application. Because of resistor tolerances, t

Applications Information (Continued)10009214FIGURE 4. Better defining the ADC Reference Voltage. Self-bias is still used, but the reference voltages a

Applications Information (Continued)If reference voltages are desired that are more than a fewtens of millivolts from the self-bias values, the circui

Applications Information (Continued)As is the case with all high speed converters, the ADC1175should be assumed to have little power supply rejection,

Applications Information (Continued)6.0 DYNAMIC PERFORMANCEThe ADC1175 is ac tested and its dynamic performance isguaranteed. To meet the published sp

Physical Dimensions inches (millimeters) unless otherwise noted24-Lead Package JMOrdering Number ADC1175CIJMNS Package Number M24DADC1175www.national.

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)24-Lead Package TCOrdering Number ADC1175CIMTCNS Package Number MTC24LIFE S

Ordering InformationADC1175CIJM SOIC (EIAJ)ADC1175CIJMX SOIC (EIAJ) (tape & reel)ADC1175CIMTC TSSOPADC1175CIMTCX TSSOP (tape & reel)Block Diag

Pin Descriptions and Equivalent Circuits (Continued)PinNo. Symbol Equivalent CircuitDescription17 VRTAnalog Input that is the high (top) side of there

Pin Descriptions and Equivalent Circuits (Continued)PinNo. Symbol Equivalent CircuitDescription2, 24 DVSSThe ground return for the digital supply. AVS

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

Converter Electrical Characteristics (Continued)The following specifications apply for AVDD=DVDD= +5.0VDC, OE = 0V, VRT= +2.6V, VRB= 0.6V, CL= 20 pF,f

Converter Electrical Characteristics (Continued)The following specifications apply for AVDD=DVDD= +5.0VDC, OE = 0V, VRT= +2.6V, VRB= 0.6V, CL= 20 pF,f

Typical Performance CharacteristicsINL vs Temp at fCLKDNL vs Temp at fCLK1000922010009221SNR vs Temp at fCLKSNR vs Temp at fCLK1000922210009233THD vs

Typical Performance Characteristics (Continued)SINAD/ENOB vs Temp SINAD/ENOB vs Temp1000922410009231SINAD and ENOB vs Clock Duty Cycle SFDR vs Temp an