AD7699BCPZ Analog Devices Inc, AD7699BCPZ Datasheet
AD7699BCPZ
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AD7699BCPZ Summary of contents
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FEATURES 16-bit resolution with no missing codes 8-channel multiplexer with choice of inputs Unipolar single-ended Differential (GND sense) Pseudobipolar Throughput: 500 kSPS INL: ±0.5 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR) Dynamic range: 93.3 dB SINAD: 91.5 dB ...
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AD7699 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Specifications ....................................................................... 5 Absolute Maximum Ratings ............................................................ 6 ESD Caution .................................................................................. 6 Pin ...
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SPECIFICATIONS VDD = 4 5 4.096 to VDD, VIO = 1 VDD, all specifications T REF Table 2. Parameter Conditions/Comments RESOLUTION ANALOG INPUT Voltage Range Unipolar mode Bipolar mode Absolute Input Voltage Positive ...
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AD7699 Parameter Conditions/Comments INTERNAL REFERENCE REF Output Voltage @ 25°C 6 REFIN Output Voltage @ 25°C REF Output Current Temperature Drift Line Regulation VDD = 5 V ± 5% Long-Term Drift 1000 hours Turn-On Settling Time CREF = 10 µF ...
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TIMING SPECIFICATIONS VDD = 4 5 4.096 to VDD, VIO = 1 VDD, all specifications T REF Table 3. 1 Parameter Conversion Time: CNV Rising Edge to Data Available Acquisition Time Time Between ...
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AD7699 ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Rating Analog Inputs 1 1 INx, COM GND − 0 VDD + 0 VDD ± 130 mA REF, REFIN GND − 0 VDD + 0.3 V Supply ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions 1 Pin No. Mnemonic Type Description 1, 20 VDD P Power Supply. Nominally 4.5 to 5.5 V and should be decoupled with 10 μF and 100 nF capacitors. 2 REF ...
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AD7699 TYPICAL PERFORMANCE CHARACTERISTICS VDD = 5V, VREF = 5V, VIO = VDD, unless otherwise noted 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 0 16,384 32,768 CODES Figure 5. Integral Nonlinearity vs. Code 250,000 220,840 200,000 150,000 100,000 50,000 26,926 ...
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REF 95 –10dB 90 85 –0.5dB 100 150 200 250 300 350 FREQUENCY (kHz) Figure 11. SNR vs. Frequency – REF –65 –70 –75 –0.5dB –80 ...
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AD7699 20kHz IN SNR 92 SINAD 90 ENOB 88 86 4.0 4.5 5.0 REFERENCE VOLTAGE (V) Figure 17. SNR, SINAD, ENOB vs. Reference Voltage 20kHz REF SNR 93 92 ...
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TEMPERATURE (°C) Figure 23. Internal Reference Output Voltage vs. Temperature, Three Devices 65 85 105 125 Rev Page ...
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AD7699 TERMINOLOGY Least Significant Bit (LSB) The LSB is the smallest increment that can be represented by a converter. For an analog-to-digital converter with N bits of resolution, the LSB expressed in volts is V (V) = REF LSB N ...
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THEORY OF OPERATION INx+ 32,768C REF GND 32,768C INx– OR COM OVERVIEW The AD7699 is an 8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converter (ADC capable of converting 500,000 samples per second (500 kSPS) and power ...
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AD7699 TRANSFER FUNCTIONS With the inputs configured for unipolar range (single ended, COM with ground sense, or paired differentially with INx− as ground sense), the data output is straight binary. With the inputs configured for bipolar range (COM = V ...
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TYPICAL CONNECTION DIAGRAMS REF ADA4841 REF ADA4841 REF NOTES 1. INTERNAL REFERENCE SHOWN. SEE THE VOLTAGE REFERENCE OUTPUT/INPUT SECTION FOR REFERENCE SELECTION USUALLY A 10µF CERAMIC CAPACITOR ...
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AD7699 Unipolar or Bipolar Figure 27 shows an example of the recommended connection diagram for the AD7699 when multiple supplies are available. Bipolar Single Supply Figure 28 shows an example of a system with a bipolar input using single supplies ...
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CH0+ IN0 CH0+ CH1+ CH1+ IN1 CH2+ CH2+ IN2 CH3+ IN3 CH3+ CH4+ CH4+ IN4 CH5+ CH5+ IN5 CH6+ IN6 CH6+ CH7+ CH7+ IN7 COM– COM GND B—8 CHANNELS, A—8 CHANNELS, COMMON REFERENCE SINGLE ENDED CH0+ (–) IN0 CH0+ (–) ...
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AD7699 DRIVER AMPLIFIER CHOICE Although the AD7699 is easy to drive, the driver amplifier must meet the following requirements: • The noise generated by the driver amplifier must be kept as low as possible to preserve the SNR and transition ...
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AD8605. The placement of the reference decoupling capacitor is also important to the performance of the AD7699, as explained in the Layout section. Mount the decoupling capacitor on the same side ...
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AD7699 DIGITAL INTERFACE The AD7699 uses a simple 4-wire interface and is compatible with SPI, MICROWIRE™, QSPI™, digital hosts, and DSPs, for example, Blackfin® ADSP-BF53x, SHARC®, ADSP-219x, and ADSP-218x. The interface uses the CNV, DIN, SCK, and SDO signals and ...
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The register can be written to during conversion, during acquisi- tion, or spanning acquisition/conversion and is updated at the end of conversion, t (maximum). There is always a one deep CONV delay when writing the CFG register. Note that at ...
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AD7699 GENERAL TIMING WITHOUT A BUSY INDICATOR Figure 35 details the timing for all three modes: reading/writing during conversion, after conversion, and spanning conversion. Note that the gating item for both CFG and data readback is at the end of ...
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READ/WRITE SPANNING CONVERSION WITHOUT A BUSY INDICATOR This mode is used when the AD7699 is connected to any host using an SPI, serial port, or FPGA. The connection diagram is shown in Figure 36, and the corresponding timing is given ...
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AD7699 GENERAL TIMING WITH A BUSY INDICATOR Figure 38 details the timing for all three modes: reading/writing during conversion, after conversion, and spanning conversion. Note that the gating item for both CFG and data readback is at the end of ...
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READ/WRITE SPANNING CONVERSION WITH A BUSY INDICATOR This mode is used when the AD7699 is connected to any host using an SPI, serial port, or FPGA with an interrupt input. The connection diagram is shown in Figure 39, and the ...
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AD7699 APPLICATION HINTS LAYOUT The printed circuit board that houses the AD7699 should be designed so that the analog and digital sections are separated and confined to certain areas of the board. The pinout of the AD7699, with all its ...
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... SEATING PLANE ORDERING GUIDE Integral Model Nonlinearity 1 AD7699BCPZ ±1.5 LSB max 1 AD7699BCPZRL7 ±1.5 LSB max 1 EVAL-AD7699CBZ 1, 2 EVAL-CONTROL BRD3Z 1 RoHS Compliant Part. 2 This controller board allows control and communicate with all Analog Devices evaluation boards whose model numbers end in CB. 0.60 MAX 4 ...
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AD7699 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07354-0-10/08(0) Rev Page ...