AD7980BRMZ Analog Devices Inc, AD7980BRMZ Datasheet
AD7980BRMZ
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AD7980BRMZ Summary of contents
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FEATURES 16-bit resolution with no missing codes Throughput: 1 MSPS Low power dissipation: 7 MSPS, 70 μ kSPS INL: ±0.6 LSB typical, ±1.25 LSB maximum SINAD: 91. kHz THD: −110 dB @ ...
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AD7980 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Application Diagram Example........................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Specifications ....................................................................... 5 Absolute Maximum Ratings ............................................................ 6 ESD Caution .................................................................................. 6 Pin Configurations ...
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SPECIFICATIONS VDD = 2.5 V, VIO = 2 5 REF Table 2. Parameter RESOLUTION ANALOG INPUT Voltage Range Absolute Input Voltage Analog Input CMRR Leakage Current @ 25°C Input Impedance ACCURACY No Missing Codes Differential Linearity ...
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AD7980 VDD = 2.5 V, VIO = 2 5 REF Table 3. Parameter Conditions REFERENCE Voltage Range Load Current 1 MSPS, REF = 5 V SAMPLING DYNAMICS −3 dB Input Bandwidth Aperture Delay VDD = 2.5 ...
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TIMING SPECIFICATIONS −40°C to +125°C, VDD = 2. 2.63 V, VIO = 3 5.5 V, unless otherwise stated. See Figure 2 and Figure 3 for load conditions. Table 4. Parameter Conversion Time: CNV Rising Edge to ...
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AD7980 ABSOLUTE MAXIMUM RATINGS Table 5. Parameter Rating Analog Inputs 1 1 IN+, IN− to GND −0 Supply Voltage REF, VIO to GND −0 VDD to GND −0 VDD ...
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PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS REF 1 10 VDD 2 9 AD7980 IN+ 3 TOP VIEW 8 (Not to Scale) IN– GND 5 6 Figure 4. 10-Lead MSOP Pin Configuration Table 6. Pin Function Descriptions 1 Pin No. ...
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AD7980 TERMINOLOGY Integral Nonlinearity Error (INL) INL refers to the deviation of each individual code from a line drawn from negative full scale through positive full scale. The point used as negative full scale occurs ½ LSB before the first ...
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TYPICAL PERFORMANCE CHARACTERISTICS VDD = 2 5.0 V, VIO = 3.3 V, unless otherwise noted. REF 1.25 POSITIVE INL: +0.33 LSB NEGATIVE INL: –0.39 LSB 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 –1.25 0 16384 ...
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AD7980 180k 168591 160k 140k 120k 100k 80k 60k 52710 38751 40k 20k 1201 27 829 8003 8004 8005 8006 8007 8008 8009 800A CODE IN HEX Figure 12. Histogram Input at the Code ...
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FREQUENCY (kHz) Figure 18. SINAD vs. Frequency –55 –35 – TEMPERATURE (°C) Figure 19. SNR vs. Temperature 1.4 I VDD 1.2 1.0 0.8 ...
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AD7980 VDD –55 –35 – TEMPERATURE (°C) Figure 24. Power-Down Currents vs. Temperature + I VIO 65 85 105 125 Rev Page ...
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THEORY OF OPERATION IN+ 32,768C REF GND 32,768C IN– CIRCUIT INFORMATION The AD7980 is a fast, low power, single-supply, precise 16-bit ADC that uses a successive approximation architecture. The AD7980 is capable of converting 1,000,000 samples per second (1 MSPS) ...
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AD7980 Transfer Functions The ideal transfer characteristic for the AD7980 is shown in Figure 26 and Table 7. 111 ... 111 111 ... 110 111 ... 101 000 ... 010 000 ... 001 000 ... 000 –FSR –FSR + 1LSB ...
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ANALOG INPUT Figure 28 shows an equivalent circuit of the input structure of the AD7980. The two diodes, D1 and D2, provide ESD protection for the analog inputs, IN+ and IN−. Care must be taken to ensure that the analog ...
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AD7980 VOLTAGE REFERENCE INPUT The AD7980 voltage reference input, REF, has a dynamic input impedance and should therefore be driven by a low impedance source with efficient decoupling between the REF and GND pins, as explained in the Layout section. ...
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CS MODE, 3-WIRE, WITHOUT BUSY INDICATOR This mode is usually used when a single AD7980 is connected to an SPI-compatible digital host. The connection diagram is shown in Figure 31, and the corresponding timing is given in Figure 32. With ...
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AD7980 CS MODE 3-WIRE WITH BUSY INDICATOR This mode is usually used when a single AD7980 is connected to an SPI-compatible digital host having an interrupt input. The connection diagram is shown in Figure 33, and the corresponding timing is ...
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CS MODE 4-WIRE, WITHOUT BUSY INDICATOR This mode is usually used when multiple AD7980s are connected to an SPI-compatible digital host. A connection diagram example using two AD7980s is shown in Figure 35, and the corresponding timing is given in ...
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AD7980 CS MODE 4-WIRE WITH BUSY INDICATOR This mode is usually used when a single AD7980 is connected to an SPI-compatible digital host that has an interrupt input, and it is desired to keep CNV, which is used to sample ...
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CHAIN MODE, WITHOUT BUSY INDICATOR This mode can be used to daisy-chain multiple AD7980s on a 3-wire serial interface. This feature is useful for reducing component count and wiring connections, for example, in isolated multi-converter applications or for systems with ...
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AD7980 CHAIN MODE WITH BUSY INDICATOR This mode can also be used to daisy-chain multiple AD7980s on a 3-wire serial interface while providing a busy indicator. This feature is useful for reducing component count and wiring connections, for example, in ...
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APPLICATION HINTS LAYOUT The printed circuit board (PCB) that houses the AD7980 should be designed so that the analog and digital sections are separated and confined to certain areas of the board. The pinout of the AD7980, with all its ...
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AD7980 OUTLINE DIMENSIONS PIN 1 INDEX AREA 0.80 0.75 0.70 SEATING PLANE 3.10 3.00 2. 5.15 3.10 4.90 3.00 4.65 2. PIN 1 0.50 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.33 SEATING 0.23 0.05 PLANE ...
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... ORDERING GUIDE Integral Model Nonlinearity 1 AD7980ARMZ ±2.5 LSB max AD7980ARMZRL7 1 ±2.5 LSB max 1 AD7980BRMZ ±1.25 LSB max 1 AD7980BRMZRL7 ±1.25 LSB max 1 AD7980ACPZ-RL ±2.5 LSB max 1 AD7980ACPZ-RL7 ±2.5 LSB max 1 AD7980BCPZ-RL ±1.25 LSB max 1 AD7980BCPZ-RL7 ±1.25 LSB max 1 AD7980BCPZ-R2 ±1.25 LSB max ...
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AD7980 NOTES Rev Page ...
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NOTES Rev Page AD7980 ...
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AD7980 NOTES ©2007–2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06392-0-6/09(B) Rev Page ...