Rainbow-electronics ADC0838 Manual do Utilizador Página 1

TL/H/5583ADC0831/ADC0832/ADC0834 and ADC08388-Bit Serial I/O A/D Converters with Multiplexer OptionsJanuary 1995ADC0831/ADC0832/ADC0834 and ADC08388-B

Connection DiagramsADC0838 8-Channel MUXSmall Outline/Dual-In-Line Package (J, M and N)TL/H/5583–8Top ViewADC0834 4-Channel MUXSmall Outline/Dual-In-L

Functional Description1.0 MULTIPLEXER ADDRESSINGThe design of these converters utilizes a sample-data com-parator structure which provides for a diffe

Functional Description (Continued)TABLE II. MUX Addressing: ADC0838Single-Ended MUX ModeMUX Address Analog Single-Ended ChannelÝSGL/ ODD/ SELECT012345

Functional Description (Continued)Since the input configuration is under software control, itcan be modified, as required, at each conversion. A chann

Functional Description (Continued)4. When the start bit has been shifted into the start locationof the MUX register, the input channel has been assign

Functional Description (Continued)4.0 THE ANALOG INPUTSThe most important feature of these converters is that theycan be located right at the analog s

Functional Description (Continued)This zener is intended for use as a shunt voltage regulatorto eliminate the need for any additional regulating compo

Applications (Continued)Digital Link and Sample Controlling Software for theSerially Oriented COP420 and the Bit Programmable I/O INS8048TL/H/5583–13C

Applications (Continued)A ‘‘Stand-Alone’’ Hook-Up for ADC0838 Evaluation*Pinouts shown for ADC0838.For all other products tie topin functions as shown

Applications (Continued)Digitizing a Current FlowTL/H/5583–15Operating with Ratiometric TransducersTL/H/5583–37*VIN(b)e0.15 VCC15% of VCCsVXDRs85% of

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

Applications (Continued)Span Adjust: OVsVINs3VZero-Shift and Span Adjust: 2VsVINs5VTL/H/5583–1620

Applications (Continued)Obtaining Higher ResolutionTL/H/5583–17Controller performs a routine to determine which input polarity (9-bit example) or whic

Applications (Continued)High Accuracy ComparatorsTL/H/5583–38DOeall 1s ifaVINlbVINDOeall 0s ifaVINkbVINDigital Load CellTL/H/5583–19#Uses one more wir

Applications (Continued)4 mA– 20 mA Current Loop Converter#All power supplied by loop#1500V isolation at output TL/H/5583–20Isolated Data Converter#No

Applications (Continued)TL/H/5583–21Two Wire Interface for 8 Channels24

Applications (Continued)Two Wire 1-Channel InterfaceTL/H/5583–22Ordering InformationPart NumberAnalog Input TotalPackageTemperatureChannels Unadjusted

Ordering Information (Continued)Part NumberAnalog Input TotalPackageTemperatureChannels Unadjusted Error RangeADC0834BCN4g(/2 Molded (N) 0§Ctoa70§CADC

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Physical Dimensions inches (millimeters)Ceramic Dual-In-Line Package (J)NS Package Number J08ACeramic Dual-In-Line Package (J)NS Package Number J14A28

Physical Dimensions inches (millimeters) (Continued)Ceramic Dual-In-Line Package (J)NS Package Number J20AHermetic Dual-In-Line Package (M)NS Package

Converter and Multiplexer Electrical Characteristics (Continued)The following specifications apply for VCCeVae5V, TAeTje25§C, and fCLKe250 kHz unless

Physical Dimensions inches (millimeters) (Continued)Hermetic Dual-In-Line Package (M)NS Package Number M20BMolded Dual-In-Line Package (N)NS Package N

Physical Dimensions inches (millimeters) (Continued)Molded Dual-In-Line Package (N)NS Package Number N14AMolded-Dual-In-Line Package (N)NS Package Num

ADC0831/ADC0832/ADC0834 and ADC08388-Bit Serial I/O A/D Converters with Multiplexer OptionsPhysical Dimensions inches (millimeters) (Continued)Molded

AC CharacteristicsThe following specifications apply for VCCe5V, tretfe20 ns and 25§C unless otherwise specified.TypTested DesignLimitParameter Condit

Typical Performance Characteristicsvs VREFVoltageUnadjusted Offset ErrorVoltageLinearity Error vs VREFTemperatureLinearity Error vsTL/H/5583–2Linearit

TRI-STATE Test Circuits and Waveformst1Ht0HTL/H/5583–4t1Ht0HTL/H/5583–23Timing DiagramsData Input TimingTL/H/5583–24Data Output TimingTL/H/5583–25ADC0

Timing Diagrams (Continued)ADC0831 TimingTL/H/5583–27*LSB first output not available on ADC0831.ADC0832 TimingTL/H/5583–28ADC0834 TimingTL/H/5583–57

Timing Diagrams (Continued)ADC0838 TimingTL/H/5583–6* Make sure clock edgeÝ18 clocks in the LSB before SE is taken low8

ADC0838 Functional Block DiagramTL/H/5583–7*Some of these functions/pins are not available with other options.Note 1: For the ADC0834, D1 is input dir