Datasheet AD7986 (Analog Devices) - 4

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Data Sheet AD7986 SPECIFICATIONS
AVDD = DVDD = 2.5 V, BVDD = 5 V, VIO = 1.8 V to 2.7 V, VREF = 4.096 V, TA = −40°C to +85°C, unless otherwise noted.
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
RESOLUTION 18 Bits ANALOG INPUT Voltage Range (IN+) − (IN−) −VREF +VREF V Absolute Input Voltage IN+, IN− −0.1 VREF + 0.1 V Common-Mode Input Range IN+, IN− VREF × 0.475 VREF × 0.5 VREF × 0.525 V Analog Input CMRR fIN = 500 kHz 100 dB1 Leakage Current at 25°C Acquisition phase 250 nA Input Impedance See the Analog Inputs section ACCURACY No Missing Codes 18 Bits Differential Linearity Error −0.95 ±0.60 +1.50 LSB2 Integral Linearity Error −2.50 ±1.00 +2.50 LSB2 Transition Noise 1.4 LSB2 Gain Error, T 3 MIN to TMAX −20 ±2.4 +20 LSB2 Gain Error Temperature Drift ±0.5 ppm/°C Zero Error, T 3 MIN to TMAX −0.8 +0.8 mV Zero Temperature Drift ±0.3 ppm/°C Power Supply Sensitivity AVDD = 2.5 V ± 5% ±4 LSB2 THROUGHPUT Conversion Rate 0 2.00 MSPS Transient Response Full-scale step 100 ns AC ACCURACY Dynamic Range VREF = 4.096 V, internal reference 95.5 96.5 dB1 VREF = 5.0 V, external reference 97 98 Signal-to-Noise Ratio, SNR fIN = 20 kHz, VREF = 4.096 V, internal 94.5 95.5 dB1 reference fIN = 20 kHz, VREF = 5.0 V, external 96.5 97.0 dB1 reference Spurious-Free Dynamic Range, SFDR fIN = 20 kHz −115 dB1 Total Harmonic Distortion, THD fIN = 20 kHz, VREF = 4.096 V, internal −113 dB1 reference fIN = 20 kHz, VREF = 5.0 V, external −114 dB1 reference Signal-to-(Noise + Distortion), SINAD fIN = 20 kHz, VREF = 4.096 V 94.5 95.5 dB1 SAMPLING DYNAMICS −3 dB Input Bandwidth 19 MHz Aperture Delay 0.7 ns 1 All specifications expressed in decibels are referred to a full-scale input FSR and tested with an input signal at 0.5 dB below ful scale, unless otherwise specified. 2 LSB means least significant bit. With the 4.096 V input range, one LSB is 31.25 µV. 3 See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference. Rev. D | Page 3 of 28 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION CONVERSION MODES OF OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT Internal Reference, REF = 4.096V (PDREF = Low) External 1.2 V Reference and Internal Buffer (PDREF = High) External Reference (PDREF = High, REFIN = Low) Reference Decoupling POWER SUPPLY DIGITAL INTERFACE DATA READING OPTIONS Reading During Conversion, Fast Hosts (Turbo or Normal Mode) Split-Reading, Any Speed Host (Turbo or Normal Mode) Reading During Acquisition, Any Speed Hosts (Turbo or Normal Mode) /CS MODE, 3-WIRE WITHOUT BUSY INDICATOR /CS MODE, 3-WIRE WITH BUSY INDICATOR /CS MODE, 4-WIRE WITHOUT BUSY INDICATOR /CS MODE, 4-WIRE WITH BUSY INDICATOR CHAIN MODE WITHOUT BUSY INDICATOR CHAIN MODE WITH BUSY INDICATOR APPLICATION HINTS LAYOUT EVALUATING THE PERFORMANCE OF THE AD7986 OUTLINE DIMENSIONS ORDERING GUIDE