adc12081civtx National Semiconductor Corporation, adc12081civtx Datasheet
adc12081civtx
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adc12081civtx Summary of contents
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... Features n Single 5V power supply n Simple analog input interface Connection Diagram © 2002 National Semiconductor Corporation n Internal Sample-and-hold n Internal Reference buffer amplifier n Low power consumption Key Specifications n Resolution n Conversion Rate ...
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Ordering Information ADC12081CIVT ADC12181 EVAL Simplified Block Diagram www.national.com Industrial (−40˚C ≤ TA ≤ +85˚C) 32 pin LQFP Evaluation Board 2 Package 10015002 ...
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Pin Descriptions and Equivalent Circuits #2 No. Symbol Equivalent Circuit REF CLOCK 8 CAL READY Description Analog signal ...
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Pin Descriptions and Equivalent Circuits #2 No. Symbol 14-19 D11 22- com AGND DGND DGND I/O www.national.com (Continued) Equivalent Circuit ...
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Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Voltage on Any Output Input Current at Any Pin (Note 3) Package Input Current (Note 3) ...
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DC and Logic Electrical Characteristics The following specifications apply for AGND = DGND = DGND I 50MHz pF/pin. After Auto-Cal at Temperature. Boldface limits apply for T CLK ...
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AC Electrical Characteristics Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test ...
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Typical Performance Characteristics INL vs Temperature www.national.com FIGURE 1. Transfer Characteristic FIGURE 2. Errors Minimized by the Auto-Cal Cycle 10015011 8 10015009 10015010 DNL vs Temperature 10015012 ...
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Typical Performance Characteristics SNR vs Temperature THD vs Temperature (Continued) 10015013 10015015 9 SINAD vs Temperature 10015014 www.national.com ...
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Specification Definitions APERTURE JITTER is the variation in aperture delay from sample to sample. Aperture jitter shows up as input noise. APERTURE DELAY See Sampling Delay. CLOCK DUTY CYCLE is the ratio of the time that the clock waveform is ...
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Timing Diagrams FIGURE 3. Data Output Timing 11 10015021 www.national.com ...
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Timing Diagrams (Continued) Functional Description The ADC12081 is a monolithic CMOS analog-to-digital con- verter capable of converting analog input signals into 12-bit digital words at 5 megasamples per second (MSPS). This device utilizes a proprietary pipeline architecture and algo- rithm ...
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Applications Information 2.2 CAL The level sensitive CAL input must be pulsed high for at least three clock cycles to begin ADC calibration. For best perfor- mance, calibration should be performed about ten seconds after power up, after resetting the ...
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Applications Information 5.0 LAYOUT AND GROUNDING Proper grounding and routing of all signals is essential to ensure accurate conversion. Separate analog and digital ground planes that are connected beneath the ADC12081 are required to achieve specified performance. The analog and ...
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Applications Information should be avoided as even a little coupling can cause prob- lems at high frequencies. This is because other lines can introduce phase noise (jitter) into the clock line, which can lead to degradation of SNR. Best performance ...
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Applications Information 7.0 COMMON APPLICATION PITFALLS Driving the inputs (analog or digital) beyond the power supply rails. For proper operation, all inputs should not go more than 300mV beyond the supply rails (more than 300mV below the ground pins or ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...