Datasheet AD4020 (Analog Devices) - 4

link to page 6 link to page 6 link to page 6 link to page 6 link to page 6 link to page 6
Data Sheet AD4020 SPECIFICATIONS
VDD = 1.71 V to 1.89 V, VIO = 1.71 V to 5.5 V, VREF = 5 V, all specifications TMIN to TMAX, high-Z mode disabled, span compression disabled, and turbo mode enabled (fS = 1.8 MSPS), unless otherwise noted.
Table 1. Parameter Test Conditions/Comments Min Typ Max Unit
RESOLUTION 20 Bits ANALOG INPUT Voltage Range VIN+ − VIN− −VREF +VREF V Span compression enabled −VREF × 0.8 +VREF × 0.8 V Operating Input Voltage VIN+, VIN− to GND −0.1 +VREF + 0.1 V Span compression enabled 0.1 × VREF 0.9 × VREF V Common-Mode Input Range VREF/2 − 0.125 VREF/2 VREF/2 + 0.125 V Common-Mode Rejection Ratio (CMRR) fIN = 500 kHz 68 dB Analog Input Current Acquisition phase, TA = 25°C 0.3 nA High-Z mode enabled, converting dc input at 1.8 MSPS 1 µA THROUGHPUT Complete Cycle 555 ns Conversion Time 300 320 350 ns Acquisition Phase1 325 ns Throughput Rate2 (fS) 0 1.8 MSPS Transient Response3 325 ns DC ACCURACY No Missing Codes 20 Bits Integral Nonlinearity Error (INL) −3.1 ±1 +3.1 ppm T = 0°C to 70°C −2 ±1 +2 ppm Differential Nonlinearity Error (DNL) −0.5 ±0.3 +0.5 LSB Transition Noise 3.3 LSB Zero Error −35 +35 LSB Zero Error Drift4 −0.3 +0.3 ppm/°C Gain Error −88 ±12 +88 LSB Gain Error Drift4 −1.2 +1.2 ppm/°C Power Supply Sensitivity VDD = 1.8 V ± 5% ±6 LSB 1/f Noise5 Bandwidth = 0.1 Hz to 10 Hz 6 µV p-p AC ACCURACY Dynamic Range 101 dB Total RMS Noise 31.5 µV rms fIN = 1 kHz, −0.5 dBFS, VREF = 5 V Signal-to-Noise Ratio (SNR) 99 100.5 dB Spurious-Free Dynamic Range (SFDR) 122 dB Total Harmonic Distortion (THD) −123 dB Signal-to-Noise-and-Distortion Ratio (SINAD) 98.5 100 dB Oversampled Dynamic Range Oversampling ratio (OSR) = 256, VREF = 5 V 122 dB fIN = 1 kHz, −0.5 dBFS, VREF = 2.5 V SNR 93.3 94.7 dB SFDR 122 dB THD −119 dB SINAD 93 94.5 dB Rev. A | Page 3 of 36 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION TRANSFER FUNCTIONS APPLICATIONS INFORMATION TYPICAL APPLICATION DIAGRAMS ANALOG INPUTS Input Overvoltage Clamp Circuit Differential Input Considerations Switched Capacitor Input RC Filter Values DRIVER AMPLIFIER CHOICE Single to Differential Driver High Frequency Input Signals Multiplexed Applications EASE OF DRIVE FEATURES Input Span Compression High-Z Mode Long Acquisition Phase VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE REGISTER READ/WRITE FUNCTIONALITY STATUS WORD /CS MODE, 3-WIRE TURBO MODE /CS MODE, 3-WIRE WITHOUT THE BUSY INDICATOR /CS MODE, 3-WIRE WITH THE BUSY INDICATOR /CS MODE, 4-WIRE TURBO MODE /CS MODE, 4-WIRE WITHOUT THE BUSY INDICATOR /CS MODE, 4-WIRE WITH THE BUSY INDICATOR DAISY-CHAIN MODE LAYOUT GUIDELINES EVALUATING THE AD4020 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE