Rainbow-electronics ADC12040 Manual de usuario

ADC1204012-Bit, 40 MSPS, 340 mW A/D Converter with InternalSample-and-HoldGeneral DescriptionThe ADC12040 is a monolithic CMOS analog-to-digital con-v

Timing Diagram20014809Output TimingTransfer Characteristic20014810FIGURE 1. Transfer CharacteristicADC12040www.national.com 10

Typical Performance Characteristics VA=VD= 5V, VDR= 3V, fCLK= 40 MHz, fIN= 10 MHz unlessotherwise statedDNL DNL vs. VA2001481820014821DNL vs. Temperat

Typical Performance Characteristics VA=VD= 5V, VDR= 3V, fCLK= 40 MHz, fIN= 10 MHz unlessotherwise stated (Continued)INL vs. Temperature INL vs. Clock

Typical Performance Characteristics VA=VD= 5V, VDR= 3V, fCLK= 40 MHz, fIN= 10 MHz unlessotherwise stated (Continued)THD vs. Clock Duty Cycle SINAD and

Functional DescriptionOperating on a single +5V supply, the ADC12040 uses apipeline architecture and has error correction circuitry to helpensure maxi

Applications Information (Continued)TABLE 2. Input to Output Relationship —Single-Ended InputVIN+VIN−OutputVCM−VREFVCM0000 0000 0000VCM−VREF/2 VCM0100

Applications Information (Continued)ing buffers between the ADC outputs and any other circuitry(74ACQ541, for example). Only one input should be con-n

Applications Information (Continued)4.0 POWER SUPPLY CONSIDERATIONSThe power supply pins should be bypassed with a 10 µFcapacitor and with a 0.1 µF ce

Applications Information (Continued)Generally, analog and digital lines should cross each other at90˚ to avoid crosstalk. To maximize accuracy in high

Applications Information (Continued)speed digital components (e.g., 74F and 74AC devices) toexhibit overshoot or undershoot that goes above the powers

Ordering InformationIndustrial (−40˚C ≤ TA≤ +85˚C) PackageADC12040CIVY 32 Pin LQFPADC12040CIVYX 32 Pin LQFP Tape and ReelADC12040EVAL Evaluation Board

Physical Dimensions inches (millimeters) unless otherwise noted32-Lead LQFP PackageOrdering Number ADC12040CIVYNS Package Number VBE32ALIFE SUPPORT PO

Pin Descriptions and Equivalent CircuitsPin No. Symbol Equivalent Circuit DescriptionANALOG I/O2VIN+Non-Inverting analog signal Input. With a 2.0V ref

Pin Descriptions and Equivalent Circuits (Continued)Pin No. Symbol Equivalent Circuit Description14–19,22–27D0–D11Digital data output pins that make u

Absolute Maximum Ratings (Notes 1,2)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distri

Converter Electrical Characteristics (Continued)Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA=VD= +

AC Electrical CharacteristicsUnless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA=VD= +5V, VDR=+3.0V, PD =

AC Electrical Characteristics (Continued)Note 10: Typical figures are at TA=TJ= 25˚C, and represent most likely parametric norms. Test limits are guar

Specification DefinitionsAPERTURE DELAY is the time after the rising edge of theclock to when the input signal is acquired or held for conver-sion.APE