ADC10662 National Semiconductor, ADC10662 Datasheet
ADC10662
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ADC10662 Summary of contents
Page 1
... CMOS analog-to-digital converters sub-microsecond conversion times yet dissipating a maxi- mum of only 235 mW. The ADC10662 and ADC10664 per- form a 10-bit conversion in two lower-resolution “flashes”, thus yielding a fast A/D without the cost, power dissipation, and other problems associated with true flash approaches. ...
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Simplified Block Diagram *ADC10664 Only Connection Diagrams Top View www.national.com DS011192-10 2 DS011192-9 DS011192-11 Top View ...
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... CC GND, AGND, These are the power supply ground pins. The DGND ADC10662 and ADC10664 have separate analog and digital ground pins (AGND and DGND) for separate bypassing of the analog and digital supplies. The ground pins should be connected to a stable, noise-free system ground ...
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... Vapor Phase (60 Sec) Infrared (15 Sec) Storage Temperature Range Junction Temperature −0.3V to +6V + −0. 0.3V Operating Ratings 5 mA Temperature Range 20 mA ADC10662CIN, ADC10662CIWM, 875 mW ADC10664CIN, 2000V ADC10664CIWM Supply Voltage Range 260˚C = +5V +5V GND, and Speed Adjust pin connected to ground REF(+) REF(−) resistor (Mode 2) unless otherwise specified ...
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DC Electrical Characteristics + = +5V, V The following specifications apply for V through a 14.0 k resistor (Mode 8. all other limits MIN MAX ...
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... AC Electrical Characteristics ADC10662CIWM ADC10664CIWM Note 5: Human body model, 100 pF discharged through a 1.5 k Note 6: See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titled “Surface Mount” found in a current National Semicon- ductor Linear Data Book for other methods of soldering surface mount devices. ...
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Typical Performance Characteristics Spectral Response with 100 kHz Sine Wave Input DS011192-23 Linearity Change vs Speed-Up Resistor DS011192-26 TRI-STATE Test Circuits and Waveforms DS011192-5 (Continued) Signal-to-Noise + THD Ratio vs Signal Frequency DS011192-24 Linearity Error Change vs Sample Time DS011192-3 ...
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... FIGURE 2. Mode 2 (RD Mode). The conversion time (t sampling time and is determined by the internal timer. Functional Description The ADC10662 and ADC10664 digitize an analog input sig- nal to 10 bits accuracy by performing two lower-resolution “flash” conversions. The first flash conversion provides the six most significant bits (MSBs) of data, and the second flash conversion provides the four least significant bits LSBs) ...
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... The es- far fewer than would be used in a conventional half-flash ap- REF proach. This allows the ADC10662 and ADC10664 to per- form high-speed conversions without excessive power drain. Mode 1 In this mode, the S /H pin controls the start of conversion. ...
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... TRI-STATE output pins will be valid. Note that data will appear on these pins throughout the conversion, but until INT goes low the data at the output pins will be the result of the previous conversion. 2.0 REFERENCE CONSIDERATIONS The ADC10662 and ADC10664 each have two reference in- puts. These inputs, V and V , are fully differential REF+ REF− ...
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... LAYOUT AND GROUNDING ± 1/2 In order to ensure fast, accurate conversions from the ADC10662 and ADC10664 necessary to use appropri- ate circuit board layout techniques. The analog ground re- turn path should be low-impedance and free of noise from other parts of the system. Noise from digital circuitry can be especially troublesome, so digital grounds should always be separate from analog grounds ...
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... A real A/D converter will have some amount of noise and distortion, and the effective bits can be found by: where S/( the ratio of signal to noise and distortion, which can vary with frequency example, an ADC10662 with a 4.85 V sine wave input signal-to-noise-plus-distortion ratio of 59.2 dB, which is equivalent to 9 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number ADC10662CIWM NS Package Number M24B Order Number ADC10664CIWM NS Package Number M28B 13 www.national.com ...
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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 ...