Datasheet AD7686 (Analog Devices) - 4

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Data Sheet AD7686 SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 2. B Grade C Grade Parameter Test Conditions/Comments Min Typ Max Min Typ Max Unit
RESOLUTION 16 16 Bits ANALOG INPUT Voltage Range IN+ − IN− 0 VREF 0 VREF V Absolute Input Voltage IN+ −0.1 VDD + 0.1 −0.1 VDD + 0.1 V IN− −0.1 +0.1 −0.1 +0.1 V Analog Input CMRR fIN = 200 kHz 65 65 dB Leakage Current at 25° Acquisition phase 1 1 nA C Input Impedance See the Analog Input See the Analog Input section section ACCURACY No Missing Codes 16 16 Bits Differential Linearity Error −1 ±0.7 −1 ±0.5 +1.5 LSB1 Integral Linearity Error −3 ±1 +3 −2 ±0.6 +2 LSB1 Transition Noise REF = VDD = 5 V 0.5 0.45 LSB1 Gain Error2, TMIN to TMAX ±2 ±8 ±2 ±6 LSB1 Gain Error Temperature Drift ±0.3 ±0.3 ppm/°C Offset Error2, TMIN to TMAX ±0.1 ±1.6 ±0.1 ±1.6 mV Offset Temperature Drift ±0.3 ±0.3 ppm/°C Power Supply Sensitivity VDD = 5 V ± 5% ±0.05 ±0.05 LSB1 THROUGHPUT Conversion Rate 0 500 0 500 kSPS Transient Response Full-scale step 400 400 ns AC ACCURACY Signal-to-Noise Ratio fIN = 20 kHz, VREF = 5 V 89 92 91 92.7 dB3 fIN = 20 kHz, VREF = 2.5 V 87.5 88 dB2 Spurious-Free Dynamic Range fIN = 20 kHz −106 −110 dB2 Total Harmonic Distortion fIN = 20 kHz −106 −110 dB2 Signal-to-(Noise + Distortion) fIN = 20 kHz, VREF = 5 V 89 92 91 92.5 dB2 fIN = 20 kHz, VREF = 5 V, −60 dB input 32 33.5 dB2 Intermodulation Distortion4 −110 −115 dB2 1 LSB means least significant bit. With the 5 V input range, 1 LSB is 76.3 µV. 2 See the Terminology section. These specifications do include full temperature range variation, but do not include the error contribution from the external reference. 3 All specifications in dB are referred to a full-scale input FSR. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 4 fIN1 = 21.4 kHz, fIN2 = 18.9 kHz, each tone at −7 dB below full scale. Rev. C | Page 3 of 28 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Terminology Typical Performance Characteristics Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Input Driver Amplifier Choice Voltage Reference Input Power Supply Supplying the ADC from the Reference Digital Interface CS/ MODE 3-Wire, No Busy Indicator CS/ Mode 3-Wire with Busy Indicator CS/ Mode 4-Wire, No Busy Indicator CS/ Mode 4-Wire with Busy Indicator Chain Mode, No Busy Indicator Chain Mode with Busy Indicator Application Hints Layout Evaluating the Performance of the AD7686 True 16-Bit Isolated Application Example Outline Dimensions Ordering Guide