Rainbow-electronics ADC0848 Manuel d'utilisateur

TL/H/5016ADC0844/ADC0848 8-Bit mP Compatible A/D Converters with Multiplexer OptionsDecember 1994ADC0844/ADC0848 8-Bit mP Compatible A/D Converterswit

Applications Information (Continued)‘‘a’’ input and then the ‘‘b’’ inputs is (/2 of a clock period.The change in the common-mode voltage during this s

Applications Information (Continued)The full-scale adjustment should be made[with the properVIN(b) voltage applied]by forcing a voltage to the VIN(a)i

Applications Information (Continued)Differential Voltage Input 9-Bit A/DTL/H/5016–19Span Adjust 0VsVINs3VTL/H/5016–20Protecting the InputTL/H/5016–21D

Applications Information (Continued)High Accuracy ComparatorsTL/H/5016–22DOeall 1s if VIN(a)lVIN(b)DOeall 0s if VIN(a)kVIN(b)Operating with Automotive

Applications Information (Continued)A Stand Alone CircuitTL/H/5016–25Note: DUT pin numbers in parentheses are for ADC0844, others are for ADC0848.Star

Applications Information (Continued)ADC0844ÐINS8039 InterfaceTL/H/5016–27SAMPLE PROGRAM FOR ADC0844ÐINS8039 INTERFACECONVERTING TWO RATIOMETRIC, DIFFE

Applications Information (Continued)I/O Interface to NSC800TL/H/5016–28SAMPLE PROGRAM FOR ADC0848ÐNSC800 INTERFACE0008 NCONV EQU 16000F DEL EQU 15 ;DE

Ordering InformationTemperature Total Unadjusted Error MUX PackageRangeg(/2 LSBg1 LSBChannels OutlineADC0844BCN4N20A0§Ctoa70§CADC0844CCN Molded DipADC

Physical Dimensions inches (millimeters)Ceramic Dual-In-Line Package (J)NS Package Number J20ACavity Dual-In-Line Package (J)NS Package Number J24F18

Physical Dimensions inches (millimeters) (Continued)Molded Dual-In-Line Package (N)NS Package Number N20AMolded Dual-In-Line Package (N)NS Package Num

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

ADC0844/ADC0848 8-Bit mP Compatible A/D Converters with Multiplexer OptionsPhysical Dimensions inches (millimeters) (Continued)Molded Chip Carrier Pac

Electrical Characteristics The following specifications apply for VCCe5VDCunless otherwise specified.Boldface limits apply from TMINto TMAX; all other

Note 9: For VIN(b)tVIN(a) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input, which will forward-conduct for

TRI-STATE Test Circuits and Waveformst1HTL/H/5016–4t1H,CLe10 pFTL/H/5016–5tre20 nst0HTL/H/5016–6t0H,CLe10 pFTL/H/5016–7tre20 nsLeakage Current Test Ci

Timing DiagramsProgramming New Channel Configuration and Starting a ConversionTL/H/5016–9Note 1: Read strobe must occur at least 600 ns after the asse

ADC0848 Functional Block DiagramTL/H/5016–117

Functional DescriptionThe ADC0844 and ADC0848 contain a 4-channel and 8-channel analog input multiplexer (MUX) respectively. EachMUX can be configured

Applications Information (Continued)ended, or pseudo-differential.Figure 1shows the threemodes using the 4-channel MUX ADC0844. The eight inputsof the