Rainbow-electronics ADC08138 User Manual

TL/H/10749ADC08131/ADC08134/ADC08138 8-Bit High-Speed Serial I/O A/D Converterswith Multiplexer Options, Voltage Reference, and Track/Hold FunctionDec

Timing Diagrams (Continued)ADC08138 TimingTL/H/10749–14*Make sure clock edgeÝ18 clocks in the LSB before SE is taken low10

ADC08138 Functional Block DiagramTL/H/10749–15*Some of these functions/pins are not available with other options.Note 1: For the ADC08134, the ‘‘SEL 1

Functional Description1.0 MULTIPLEXER ADDRESSINGThe design of these converters utilizes a comparator struc-ture with built-in sample-and-hold which pr

Functional Description (Continued)TABLE II. MUX Addressing: ADC08138 (Continued)Differential MUX ModeMUX Address Analog Differential Channel-PairÝSTAR

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

Functional Description (Continued)3. 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

ApplicationsA ‘‘Stand-Alone’’ Hook-Up for ADC08138 Evaluation*Pinouts shown for ADC08138.For all other products tie to pin functions as shown.Low-Cost

Applications (Continued)Protecting the InputDiodes are 1N914TL/H/10749–22Operating with Ratiometric Transducers*VIN(b)e0.15 VREF15% of VREFsVXDRs85% o

Applications (Continued)Zero-Shift and Span Adjust: 2VsVINs5VTL/H/10749–25Physical Dimensions inches (millimeters)Order Number ADC08134BIWM or ADC0813

Absolute Maximum Ratings (Notes1&3)If Military/Aerospace specified devices are required,please contact the National Semiconductor SalesOffice/Dist

Physical Dimensions inches (millimeters) (Continued)Order Number ADC08138BIWM or ADC08138CIWMNS Package Number M20BOrder Number ADC08131BIN or ADC0813

Physical Dimensions inches (millimeters) (Continued)Order Number ADC08134BIN or ADC08134CINNS Package Number N14A21

ADC08131/ADC08134/ADC08138 8-Bit High-Speed Serial I/O A/D Converterswith Multiplexer Options, Voltage Reference, and Track/Hold FunctionPhysical Dime

Electrical Characteristics (Continued)The following specifications apply for VCCea5VDC,VREFea2.5 VDCand fCLKe1 MHz unless otherwise specified.Boldface

Electrical Characteristics (Continued)The following specifications apply for VCCea5VDCand fCLKe1 MHz unless otherwise specified. Boldface limits apply

Electrical Characteristics (Continued)The following specifications apply for VCCea5VDC,VREFea2.5 VDCand tretfe20 ns unless otherwise specified.Boldfac

ADC08138 Simplified Block DiagramTL/H/10749–16

Typical Converter Performance CharacteristicsReference VoltageLinearity Error vsTemperatureLinearity Error vsClock FrequencyLinearity Error vsADC08134

TRI-STATE Test Circuits and Waveformst1Ht0HTL/H/10749–7t1Ht0HTL/H/10749–8Timing DiagramsData Input TimingTL/H/10749–9*To reset these devices, CLK and

Timing Diagrams (Continued)ADC08131 TimingTL/H/10749–12*LSB first output not available on ADC08131.LSB information is maintained for remainder of cloc