EVAL-AD7983SDZ Analog Devices, EVAL-AD7983SDZ Datasheet
EVAL-AD7983SDZ
Specifications of EVAL-AD7983SDZ
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EVAL-AD7983SDZ Summary of contents
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... Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. ...
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... CS Mode, 3-Wire with Busy Indicator .................................... 18 CS Mode, 4-Wire Without Busy Indicator ............................. 19 CS Mode, 4-Wire with Busy Indicator .................................... 20 Chain Mode Without Busy Indicator ...................................... 21 Chain Mode with Busy Indicator ............................................. 22 Application Hints ........................................................................... 23 Layout .......................................................................................... 23 Evaluating the Performance of the AD7983 ............................... 23 Outline Dimensions ....................................................................... 24 Ordering Guide .......................................................................... 24 Rev Page ...
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SPECIFICATIONS VDD = 2.5 V, VIO = 2 5.5 V, REF = Table 2. Parameter RESOLUTION ANALOG INPUT Voltage Range Absolute Input Voltage Analog Input CMRR Leakage Current @ 25°C Input Impedance ACCURACY No Missing ...
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AD7983 VDD = 2.5 V, VIO = 2 5.5 V, REF = Table 3. Parameter Conditions REFERENCE Voltage Range Load Current 1.33 MSPS SAMPLING DYNAMICS −3 dB Input Bandwidth Aperture Delay DIGITAL INPUTS Logic Levels ...
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TIMING SPECIFICATIONS T = −40°C to +85°C, VDD = 2. 2.63 V, VIO = 3 5.5 V, unless otherwise noted. See Figure 2 and Figure 3 for load conditions. A Table 4. Parameter Conversion Time: CNV ...
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AD7983 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 AD7983 IN TOP VIEW (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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AD7983 TYPICAL PERFORMANCE CHARACTERISTICS VDD = 2.5 V, REF = 5 V, VIO = 3.3 V, unless otherwise noted. 1.25 POSITIVE INL: 0.30LSB NEGATIVE INL: –0.37LSB 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 –1.25 0 16384 32768 CODE ...
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TEMPERATURE (°C) Figure 12. THD vs. Temperature –105 –110 –115 THD –120 SFDR –125 –130 2.5 3.0 3.5 4.0 4.5 REFERENCE VOLTAGE (V) Figure 13. THD, SFDR ...
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AD7983 2.5 I VDD 2.0 1.5 1.0 I REF 0.5 I VIO 0 2.375 2.425 2.475 2.525 V VOLTAGE (V) DD Figure 18. Operating Currents vs. Supply 2.5 I VDD 2.0 1.5 1.0 I REF 0.5 I VIO 0 –55 ...
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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 code ...
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AD7983 THEORY OF OPERATION IN+ 32,768C REF GND 32,768C IN– CIRCUIT INFORMATION The AD7983 is a fast, low power, single-supply, precise 16-bit ADC that uses a successive approximation architecture. The AD7983 is capable of converting 1,000,000 samples per second (1 ...
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Transfer Functions The ideal transfer characteristic for the AD7983 is shown in Figure 22 and Table 7. 111 ... 111 111 ... 110 111 ... 101 000 ... 010 000 ... 001 000 ... 000 –FSR –FSR + 1LSB –FSR ...
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AD7983 ANALOG INPUTS Figure 24 shows an equivalent circuit of the input structure of the AD7983. The two diodes, D1 and D2, provide ESD protection for the analog inputs, IN+ and IN−. Care must be taken to ensure that the ...
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VOLTAGE REFERENCE INPUT The AD7983 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. When ...
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AD7983 DIGITAL INTERFACE Though the AD7983 has a reduced number of pins, it offers flexibility in its serial interface modes. When in CS mode, the AD7983 is compatible with SPI, QSPI, and digital hosts. This interface can use either a ...
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CS MODE, 3-WIRE WITHOUT BUSY INDICATOR This mode is usually used when a single AD7983 is connected to an SPI-compatible digital host. The connection diagram is shown in Figure 26, and the corresponding timing is given in Figure 27. With ...
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AD7983 CS MODE, 3-WIRE WITH BUSY INDICATOR This mode is usually used when a single AD7983 is connected to an SPI-compatible digital host that has an interrupt input. The connection diagram is shown in Figure 28, and the corresponding timing ...
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CS MODE, 4-WIRE WITHOUT BUSY INDICATOR This mode is usually used when multiple AD7983s are connected to an SPI-compatible digital host. A connection diagram example using two AD7983s is shown in Figure 30, and the corresponding timing is given in ...
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AD7983 CS MODE, 4-WIRE WITH BUSY INDICATOR This mode is usually used when a single AD7983 is connected to an SPI-compatible digital host that has an interrupt input, and when it is desired to keep CNV, which is used to ...
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CHAIN MODE WITHOUT BUSY INDICATOR This mode can be used to daisy-chain multiple AD7983s on a 3-wire serial interface. This feature is useful for reducing component count and wiring connections, for example, in isolated multiconverter applications or for systems with ...
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AD7983 CHAIN MODE WITH BUSY INDICATOR This mode can also be used to daisy-chain multiple AD7983s 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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... Figure 38 and Figure 39. EVALUATING THE PERFORMANCE OF THE AD7983 Other recommended layouts for the AD7983 are outlined in the documentation of the evaluation board for the AD7983 (EVAL-AD7983CBZ). The evaluation board package includes a fully assembled and tested evaluation board, documentation, and software for controlling the board from a PC via the EVAL-CONTROL BRD ...
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... This board can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BRD3 for evaluation/demonstration purposes. 3 This board allows control and communicate with all Analog Devices evaluation boards ending in the CB designator. ©2007–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...