Rainbow-electronics ADC0820 Manual do Utilizador

TL/H/5501ADC0820 8-Bit High Speed mP Compatible A/D Converter with Track/Hold FunctionFebruary 1995ADC0820 8-Bit High Speed mP CompatibleA/D Converter

1.0 Functional Description (Continued)When a typical conversion is started, the WRline is broughtlow. At this instant the MS comparators go from zeroi

1.0 Functional Description (Continued)TL/H/5501–20Note: MS means most significantLS means least significantFIGURE 8. Operating Sequence (WR-RD Mode)OT

2.0 Analog Considerations (Continued)External Reference 2.5V Full-ScaleTL/H/5501–21Power Supply as ReferenceTL/H/5501–22Input Not Referred to GNDTL/H/

3.0 Typical Applications8-Bit Resolution ConfigurationTL/H/5501–269-Bit Resolution ConfigurationTL/H/5501–27Telecom A/D ConverterTL/H/5501–28Multiple

3.0 Typical Applications (Continued)8-Bit 2-Quadrant Analog MultiplierTL/H/5501–30Fast Infinite Sample-and-HoldTL/H/5501–3114

3.0 Typical Applications (Continued)Digital Waveform RecorderTL/H/5501–3215

Ordering InformationPart NumberTotalPackageTemperatureUnadjusted Error RangeADC0820BCV V20AÐMolded Chip 0§Ctoa70§CCarrierADC0820BCWMg(/2 LSB M20BÐWide

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Physical Dimensions inches (millimeters)Hermetic Dual-In-Line Package (J)Order Number ADC0820CCJNS Package Number J20ASO Package (M)Order Number ADC08

Physical Dimensions inches (millimeters) (Continued)Shrink Small Outline Package (SSOP)Order Number ADC0820CCMSANS Package Number MSA20Molded Dual-In-

Absolute Maximum Ratings (Notes1&2)If Military/Aerospace specified devices are required,please contact the National Semiconductor SalesOffice/Dist

ADC0820 8-Bit High Speed mP Compatible A/D Converter with Track/Hold FunctionPhysical Dimensions inches (millimeters) (Continued)Molded Chip Carrier P

DC Electrical Characteristics The following specifications apply for VCCe5V, unless otherwise specified.Boldface limits apply from TMINto TMAX; all ot

AC Electrical Characteristics (Continued) The following specifications apply for VCCe5V, tretfe20 ns,VREF(a)e5V, VREF(b)e0V and TAe25§C unless otherwi

Timing DiagramsTL/H/5501–7FIGURE 2. RD Mode (Pin 7 is Low)Note: On power-up the state of INT can be high or low.TL/H/5501–8FIGURE 3a. WR-RD Mode (Pin

Typical Performance CharacteristicsLogic Input ThresholdVoltage vs Supply VoltageConversion Time (RD Mode)vs TemperaturePower Supply Current vsTempera

Description of Pin FunctionsPin Name Function1VINAnalog input; rangeeGNDsVINsVCC2 DB0 TRI-STATE data outputÐbit 0 (LSB)3 DB1 TRI-STATE data outputÐbit

1.0 Functional Description (Continued)1.2 THE SAMPLED-DATA COMPARATOREach comparator in the ADC0820 consists of a CMOS in-verter with a capacitively c

Detailed Block DiagramTL/H/5501–15FIGURE 79