Datasheet AD7679 (Analog Devices) - 4

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AD7679 SPECIFICATIONS
–40°C to +85°C, VREF = 4.096 V, AVDD = DVDD= 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.
Table 2. Parameter Conditions Min Typ Max Unit
RESOLUTION 18 Bits ANALOG INPUT Voltage Range VIN+ – VIN– –VREF +VREF V Operating Input Voltage VIN+, VIN– to AGND –0.1 AVDD+0.1 V Analog Input CMRR fIN = 100 kHz 68 dB Input Current 570 kSPS Throughput 25 μA Input Impedance1 THROUGHPUT SPEED Complete Cycle 1.75 μs Throughput Rate 0 570 kSPS DC ACCURACY Integral Linearity Error –2.5 +2.5 LSB2 Differential Linearity Error –1 +1.75 LSB No Missing Codes 18 Bits Transition Noise VREF = 5 V 0.7 LSB Zero Error, TMIN to TMAX –40 +40 LSB Zero Error Temperature Drift ±0.5 ppm/°C Gain Error, T 3 MIN to TMAX –0.048 See Note 3 +0.048 % of FSR Gain Error Temperature Drift ±1.6 ppm/°C Power Supply Sensitivity AVDD = 5 V ± 5% ±4 LSB AC ACCURACY Signal-to-Noise fIN = 2 kHz, VREF = 5 V 101 dB4 VREF = 4.096 V 97.5 99 dB fIN = 10 kHz, VREF = 4.096 V 98 dB fIN = 100 kHz, VREF = 4.096 V 97 dB Dynamic Range VIN+ = VIN– = VREF/2 = 2.5 V 103 dB Spurious-Free Dynamic Range fIN = 2 kHz 120 dB fIN = 10 kHz 118 dB fIN = 100 kHz 105 dB Total Harmonic Distortion fIN = 2 kHz –115 dB fIN = 10 kHz –113 dB fIN = 100 kHz –98 dB Signal-to-(Noise + Distortion) fIN = 2 kHz, VREF = 4.096 V 98 dB fIN = 2 kHz, –60 dB Input 40 dB –3 dB Input Bandwidth 26 MHz SAMPLING DYNAMICS Aperture Delay 2 ns Aperture Jitter 5 ps rms Transient Response Full-Scale Step 250 ns Overvoltage Recovery 250 ns REFERENCE External Reference Voltage Range REF 3 4.096 AVDD + 0.1 V REF Voltage with Reference Buffer REFBUFIN = 2.5 V 4.05 4.096 4.15 V Reference Buffer Input Voltage Range REFBUFIN 1.8 2.5 2.6 V REFBUFIN Input Current –1 +1 μA REF Current Drain 570 kSPS Throughput 235 μA Rev. A | Page 3 of 28 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS DEFINITION OF SPECIFICATIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Inputs Driver Amplifier Choice Single-to-Differential Driver Voltage Reference Power Supply POWER DISSIPATION VERSUS THROUGHPUT CONVERSION CONTROL DIGITAL INTERFACE PARALLEL INTERFACE SERIAL INTERFACE MASTER SERIAL INTERFACE Internal Clock SLAVE SERIAL INTERFACE External Clock External Discontinuous Clock Data Read after Conversion External Clock Data Read during Conversion MICROPROCESSOR INTERFACING SPI Interface (ADSP-219x) APPLICATION HINTS LAYOUT EVALUATING THE AD7679’S PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE