adc10731 National Semiconductor Corporation, adc10731 Datasheet
adc10731
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adc10731 Summary of contents
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... ADC10731/ADC10732/ADC10734/ADC10738 10-Bit Plus Sign Serial I/O A/D Converters with Mux, Sample/Hold and Reference General Description This series of CMOS 10-bit plus sign successive approxima- tion A/D converters features versatile analog input multiplex- ers, sample/hold and a 2.5V band-gap reference. The 1-, 2-, 4-, or 8-channel multiplexers can be software configured for single-ended or differential mode of operation ...
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Connection Diagrams Top View See NS Package Number M16B Top View See NS Package Number M20B www.national.com DS011390-2 See NS Package Number M20B DS011390-3 See NS Package Number M24B SSOP Package DS011390-34 See NS Package Number MSA20 2 DS011390-4 Top ...
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... Ordering Information Industrial Temperature Range ADC10731CIWM ADC10732CIWM ADC10734CIMSA ADC10734CIWM ADC10738CIWM Pin Descriptions CLK The clock applied to this input controls the suc- cessive approximation conversion time interval, the acquisition time and the rate at which the se- rial data exchange occurs. The rising edge loads the information on the DI pin into the multiplexer address shift register ...
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... Power Supply Sensitivity Offset Error Full-Scale Error DC Common Mode Error (Note 14) Multiplexer Channel to Channel Matching www.national.com (Notes 1, 3) Vapor Phase (60 seconds) Infrared (15 seconds) Storage Temperature Operating Ratings 6.5V Operating Temperature Range 6.5V ADC10731CIWM 0.3V to −0.3V ADC10732CIWM ADC10734CIWM, 120 mA ADC10734CIMSA, ADC10738CIWM 500 mW Supply Voltage + + = AV ...
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Electrical Characteristics + = AV The following specifications apply for V − = GND for Unsigned Characteristics and f Characteristics ply for all other limits MIN MAX ...
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Electrical Characteristics + The following specifications apply for V − = GND for Unsigned Characteristics and f Characteristics ply for all other limits MIN MAX Symbol Parameter ...
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... SARS TRI-STATE Delay from Falling Edge of Clock to t DCS Falling Edge “HIGH” Time for A/D Reset after t CS(H) Reading of Conversion Result ADC10731 Minimum CS “Low” Time t CS(L) to Start a Conversion Time from End of Conversion Going “Low” Delay from Power-Down command to ...
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... Electrical Characteristics Part Number ADC10731CIWM ADC10732CIWM ADC10734CIMSA ADC10734CIWM ADC10738CIWM Note 6: The human body model is a 100 pF capacitor discharged through a 1.5 k rectly into each pin. Note 7: See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titied “Surtace Mount” found in any post 1986 National Semi- conductor Linear Data Book for other methods of soldering surtace mount devices ...
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Electrical Characteristics FIGURE 2. Simplified Error Curve vs Output Code (Continued) FIGURE 1. Transter Characteristic 9 DS011390-8 DS011390-26 www.national.com ...
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Electrical Characteristics Typical Performance Characteristics Analog Supply Current ( Temperature DS011390-35 Digital Supply Current ( Clock Frequency DS011390-38 www.national.com (Continued) Leakage Current Test Circuit DS011390-9 Analog Supply Current ( Clock Frequency ...
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Typical Performance Characteristics Linearity Error vs Clock Frequency DS011390-41 10-Bit Unsigned Signal-to-Noise + THD Ratio vs Input Signal Level DS011390-44 Typical Reference Performance Characteristics Load Regulation DS011390-47 (Continued) Linearity Error vs Reference Voltage DS011390-42 Spectral Response with 34 kHz Sine ...
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Typical Reference Performance Characteristics Available Output Current vs Supply Voltage DS011390-50 TRI-STATE Test Circuits and Waveforms Timing Diagrams www.national.com (Continued) DS011390-10 DS011390-12 FIGURE 3. DI Timing 12 DS011390-11 DS011390-13 DS011390-14 ...
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Timing Diagrams (Continued) FIGURE 6. Hardware Power Up/Down Sequence FIGURE 4. DO Timing FIGURE 5. Delayed DO Timing 13 DS011390-15 DS011390-16 DS011390-17 www.national.com ...
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... Timing Diagrams (Continued) FIGURE 7. Software Power Up/Down Sequence Note low during power up of the power supply voltages (AV is invalid. FIGURE 8. ADC10731 CS Low during Conversion www.national.com + + and DV ) then CS needs to go high for t . The data output after the first conversion CS(H) 14 DS011390-18 DS011390-19 ...
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Timing Diagrams (Continued) 15 www.national.com ...
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Timing Diagrams (Continued) www.national.com 16 ...
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Timing Diagrams (Continued) 17 www.national.com ...
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Timing Diagrams (Continued) TABLE 1. ADC10738 Multiplexer Address Assignment MUX Address MA0 MA1 MA2 MA3 PU SING/ ODD/ SEL1 DIFF SIGN ...
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... CLK) between conversions. This is necessary to re- CS(H) set the internal logic. Figures 10, 11 show the operation of the devices when CS is taken high while the ADC10731/2/ 4/8 is converting. CS may be taken high during the conver- sion and kept high indefinitely to delay the output data. This mode simplifies the interface to other devices while the ADC10731/2/4/8 is busy converting ...
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Applications Hints (Continued) www.national.com 20 ...
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... In a true differential input stage, a signal that is common to − inputs REF both “+” and “−” inputs is canceled. For the ADC10731/2/4/8, the positive input of a selected channel pair is only sampled once before the start of a conversion during the acquisition time (t ) ...
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Applications Hints (Continued) 4 Single-Ended DS011390-51 FIGURE 13. Analog Input Multiplexer Options www.national.com 2 Differential DS011390-52 2 Single-Ended and 1 Differential DS011390-54 Ratiometric Using the Internal Reference DS011390-29 FIGURE 14 Psuedo- Differential DS011390-53 ...
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... This completes the adjustment procedure. 3.5 The Input Sample and Hold The ADC10731/2/4/8’s sample/hold capacitor is imple- mented in the capacitor array. After the channel address is loaded, the array is switched to sample the selected positive analog input ...
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Applications Hints (Continued) FIGURE 16. Analog Input Model Note: Diodes are 1N914. Note: The protection diodes should be able to withstand the output current of the op amp under current limit resistors FIGURE 18. Zero-Shift and Span-Adjust for ...
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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number ADC10731CIWM NS Package Number M16B 25 www.national.com ...
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number ADC10732CIWM and ADC10734CIWM www.national.com NS Package Number M20B Order Number ADC10738CIWM NS Package Number M24B 26 ...
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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 ...