AD7766-1 AD [Analog Devices], AD7766-1 Datasheet
AD7766-1
Related parts for AD7766-1
AD7766-1 Summary of contents
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... Table 1. 24-Bit Analog-to-Digital Converters Part No. AD7760 AD7762/ DGND AD7763 AD7764 AD7765 SYNC/PD CS AD7766 AD7766-1 AD7766-2 SDI 1 Dynamic range at maximum output data rate. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs AD7767 Description 1 2 ...
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AD7767 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Timing Diagrams.......................................................................... 6 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configuration ...
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SPECIFICATIONS 2.5 V ± DRIVE unless otherwise noted. Table 2. Parameter OUTPUT DATA RATE AD7767 AD7767-1 AD7767-2 1 ANALOG INPUT Differential Input Voltage Absolute Input ...
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AD7767 Parameter 1 DIGITAL FILTER RESPONSE Group Delay Settling Time (Latency) Pass-Band Ripple Pass Band −3 dB Bandwidth Stop Band Frequency Stop-Band Attenuation REFERENCE INPUT 1 V Input Voltage REF+ 1 DIGITAL INPUTS (Logic Levels Input ...
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TIMING SPECIFICATIONS 2.5 V ± DRIVE 1 unless otherwise noted Table 3. Parameter Limit at T DRDY Operation t 510 100 2 ...
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AD7767 TIMING DIAGRAMS 1 MCLK t 1 DRDY Figure 2. DRDY vs. MCLK Timing Diagram for AD7767 (Decimate by 8 for AD7767-1 (Decimate by 16 for AD7767-2 (Decimate by 32) DRDY ...
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PART IN POWER-DOWN MCLK ( SYNC/PD ( DRDY (O) VALID DATA DOUT (O) Figure 5. Reset, Synchronization, and Power-Down Timing Diagram PART OUT OF POWER-DOWN FILTER RESET BEGINS SAMPLING ...
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AD7767 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter AV to AGND DGND REFGND REF+ REFGND to AGND V to DGND DRIVE V V ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description 1 AV +2.5 V Analog Power Supply Reference Input for the AD7767. An external reference must be applied to this input pin. The ...
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AD7767 TYPICAL PERFORMANCE CHARACTERISTICS 2.5 V ± DRIVE otherwise noted. All FFTs were generated using 8192 samples using a 4-term Blackman-Harris window. 0 –20 –40 ...
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FREQUENCY (Hz) Figure 13. AD7767 FFT, 1 kHz, −60 dB Input Tone 0 –20 –40 –60 –80 –100 –120 –140 –160 –180 0 ...
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AD7767 –110 –112 –114 –116 AD7767-2 –118 –120 –122 AD7767-1 AD7767 –124 –126 –128 –130 0 100k 200k 300k 400k 500k 600k FREQUENCY (Hz) Figure 19. AD7767/AD7767-1/AD7767-2 THD vs. MCLK Frequency 115 114 AD7767-2 113 112 111 AD7767-1 110 109 ...
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MAX = 8388593 350 MIN = 8388526 SPREAD = 69 CODES 300 250 200 150 100 50 0 CODES Figure 25. AD7767-2 24-Bit Histogram 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 4194304 8388608 12582912 2097152 ...
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AD7767 TERMINOLOGY Signal-to-Noise Ratio (SNR) SNR is the ratio of the rms value of the actual input signal to the rms sum of all other spectral components below the Nyquist frequency, excluding harmonics and dc. The value for SNR is ...
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THEORY OF OPERATION The AD7767/AD7767-1/AD7767-2 operate using a fully differential analog input applied to a successive approximation (SAR) core. The output of the oversampled SAR is filtered using a linear phase digital FIR filter. The fully filtered data is output ...
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AD7767 0 –20 –40 –60 –80 –100 –120 –140 –160 0 16k 32k 48k 64k 80k FREQUENCY (Hz) Figure 32. AD7767 Digital Filter Frequency Response 0 –20 –40 –60 –80 –100 –120 –140 –160 0 8k 16k 24k 32k 40k ...
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AD7767 INTERFACE The AD7767 provides the user with a flexible serial interface, enabling the user to implement the most desirable interfacing scheme for their application. The AD7767 interface comprises seven different signals. Five of these signals are inputs: MCLK, CS ...
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AD7767 DAISY CHAINING Daisy chaining devices allows numerous devices to use the same digital interface lines by cascading the outputs of multiple ADCs on a single data line. This feature is especially useful for reduc- ing component count and wiring ...
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DAISY CHAIN MODE CONFIGURATION AND TIMING DIAGRAMS SYNC/PD CS SYNC/PD CS AD7767 (D) SDI SDI SCLK MCLK SCLK MCLK Figure 36. AD7767 Daisy Chain Configuration with Four AD7767 Devices 1 MCLK DRDY ( × SCLK SCLK AD7767 ...
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AD7767 DRIVING THE AD7767 The AD7767 must be driven with fully differential inputs. The common-mode voltage of the differential inputs to the AD7767 device and thus the limits on the differential inputs are set by the reference voltage V applied ...
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ANTIALIASING The AD7767/AD7767-1/AD7767-2 sample the analog input at a maximum rate of 1.024 MHz. The on-board digital filter provides up to 100 dB attenuation of any possible aliasing frequencies in the range from the beginning of the filter stop band ...
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AD7767 V INPUT SIGNAL REF+ The AD7767/AD7767-1/AD7767-2 V REF + 5 V input, which is generated by a low noise voltage reference. Either the ADR445 or the ADR425 can be used with the AD7767/ AD7767-1/AD7767-2 device. This reference voltage input ...
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OUTLINE DIMENSIONS 4.50 4.40 4.30 PIN 1 0.15 0.05 ORDERING GUIDE Model Temperature Range AD7767BRUZ 1 −40°C to +105°C 1 AD7767BRUZ-RL7 −40°C to +105°C AD7767BRUZ-1 1 −40°C to +105°C 1 AD7767BRUZ-1-RL7 −40°C to +105°C 1 AD7767BRUZ-2 −40°C to +105°C 1 ...
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AD7767 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06859-0-8/07(0) Rev Page ...