Rainbow-electronics ADC12041 Uživatelský manuál Strana 1

TL/H/12441ADC12041 12-Bit Plus Sign 216 kHz Sampling Analog-to-Digital ConverterDecember 1995ADC1204112-Bit Plus Sign 216 kHz SamplingAnalog-to-Digita

Electrical Characteristics (Continued)TL/H/12441–9FIGURE 5a. Transfer CharacteristicTL/H/12441–10FIGURE 5b. Simplified Error vs Output Code without Au

Electrical Characteristics (Continued)TL/H/12441–11FIGURE 5c. Simplified Error vs Output Code after Auto-Calibration CycleTL/H/12441–12FIGURE 6. Offse

Timing DiagramsTL/H/12441–13FIGURE 7a. Sync-Out Write (WMODEe1, BWe1), Read and Convert CyclesTL/H/12441–14FIGURE 7b. Sync-In Write (WMODEe1, BWe1), R

Timing Diagrams (Continued)TL/H/12441–46FIGURE 7c. Sync-Out Write (WMODEe0, BWe1), Read and Convert CyclesTL/H/12441–47FIGURE 7d. Sync-In Write (WMODE

Timing Diagrams (Continued)TL/H/12441–48FIGURE 7e. Sync-Out Read and Convert CyclesTL/H/12441–49FIGURE 7f. Sync-In Read and Convert Cycles14

Timing Diagrams (Continued)TL/H/12441–50FIGURE 7g. 8-bit Bus Read Cycle (Sync-Out)TL/H/12441–51FIGURE 7h. 8-bit Bus Read Cycle (Sync-In)15

Timing Diagrams (Continued)TL/H/12441–15FIGURE 7i. Write Signal Negates RDY (Writing the Standby, Auto-Cal or Auto-Zero Command)TL/H/12441–16FIGURE 7j

Typical Performance Characteristics (See Note 19, Electrical Characteristic Section)Change vs Clock FrequencyIntegral Linearity Error (INL)TL/H/12441–

Typical Performance Characteristics (See Note 21, Electrical Characteristic Section) (Continued)Clock FrequencySupply Current vsTL/H/12441–29Clock Fre

Typical Performance Characteristics (Continued) The curves were obtained under the following condi-tions. RSe50X,TAe25§C, VAaeVDae5V, VREFe4.096V, fCL

Connection Diagrams28-Pin SSOPTL/H/12441–2Order Number ADC12041CIMSASee NS Package Number MSA2828-Pin PLCCTL/H/12441–3Order Number ADC12041CIVSee NS P

Pin DescriptionPLCC andPinSSOP Pkg.NameDescriptionPin Number5VINaThe analog ADC inputs. VINais the non-inverting (positive) input and VINbis the inver

Register Bit DescriptionCONFIGURATION REGISTER (Write Only)This is an 8-bit write-only register that is used to program the functionality of the ADC12

Functional DescriptionThe ADC12041 is programmed through a digital interfacethat supports an 8-bit or 16-bit data bus. The digital inter-face consists

Features and Operating Modes (Continued)If the settling time of the source is greater than 500 ns, theacquisition time should be about 300 ns longer t

Features and Operating Modes (Continued)SYNC-IN/SynchronousFor the SYNC-IN case, it is assumed that a series of SYNCpulses at the desired sampling rat

Analog Application InformationREFERENCE VOLTAGEThe ADC12041 has two reference inputs, VREFaandVREFb. They define the zero to full-scale range of the a

Analog Application Information (Continued)INPUT CURRENTAt the start of the acquisition window (tAcqSYNOUT) a charg-ing current (due to capacitive swit

Analog Application Information (Continued)TL/H/12441–45FIGURE 10. Top View of Printed Circuit Board for a 28-Pin PLCC ADC12041When measuring AC input

28

Physical Dimensions inches (millimeters)28-Lead Molded Plastic Leaded Chip CarrierOrder Number ADC12041CIVNS Package Number V28A29

Absolute Maximum Ratings(Notes 1 and 2)Supply Voltage (VAaand VDa) 6.0VVoltage at all Inputsb0.3V to Vaa0.3VlVAabVDal300 mVlAGNDbDGNDl300 mVInput Curr

ADC12041 12-Bit Plus Sign 216 kHz Sampling Analog-to-Digital ConverterPhysical Dimensions inches (millimeters) (Continued)28-Lead SSOPOrder Number ADC

Power Supply Characteristics The following specifications apply to the ADC12041 for VAaeVDae5V,VREFae4.096V, VREFbe0.0V, 12-bitasign conversion mode,

Digital Logic Input/Output Characteristics The following specifications apply to the ADC12041 forVAaeVDae5V, VREFae4.096V, VREFbe0.0V, 12-bitasign con

Digital Timing Characteristics The following specifications apply to the ADC12041, 13-bit data bus width,VAaeVDae5V, fCLKe12 MHz, tfe3 ns and CLe50 pF

Notes on Specifications (Continued)Note 6: Each input is protected by a nominal 6.5V breakdown voltage zener diode to GND, as shown below, input volta

Electrical CharacteristicsTL/H/12441–5FIGURE 1. Output Digital Code vs the Operating Input Voltage Range (General Case)TL/H/12441–6FIGURE 2. Output Di

Electrical Characteristics (Continued)TL/H/12441–7FIGURE 3. VREFOperating Range (General Case)TL/H/12441–8FIGURE 4. VREFOperating Range for VAe5V9