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AD7982 датащи(PDF) 4 Page - Analog Devices |
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AD7982 датащи(HTML) 4 Page - Analog Devices |
4 / 26 page Data Sheet AD7982 Rev. D | Page 3 of 25 SPECIFICATIONS VDD = 2.5 V, VIO = 1.71 V to 5.5 V, VREF = 5 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+ and IN− −0.1 VREF + 0.1 V Common-Mode Input Range IN+ and IN− VREF × 0.475 VREF × 0.5 VREF × 0.525 V Analog Input Common Mode Rejection Ratio (CMRR) fIN = 450 kHz 67 dB Leakage Current at 25°C Acquisition phase 200 nA Input Impedance See the Analog Inputs section ACCURACY No Missing Codes 18 Bits Differential Linearity Error (DNL) −0.85 ±0.5 +1.5 LSB1 Integral Linearity Error (INL) −2 ±1 +2 LSB1 Transition Noise VREF = 5 V 1.05 LSB1 Gain Error, TMIN to TMAX2 −0.023 +0.004 +0.023 % of FS Gain Error Temperature Drift ±1 ppm/°C Zero Error, TMIN to TMAX2 ±100 +700 μV Zero Temperature Drift 0.5 ppm/°C Power Supply Rejection Ratio (PSRR) VDD = 2.5 V ± 5% 90 dB THROUGHPUT Conversion Rate VIO ≥ 2.3 V 0 1 MSPS VIO ≥ 1.71 V 0 800 kSPS Transient Response Full-scale step 290 ns AC ACCURACY Dynamic Range VREF = 5 V 97 99 dB3 VREF = 2.5 V 93 dB3 Oversampled Dynamic Range4 FO = 1 kSPS 129 dB3 Signal-to-Noise Ratio (SNR) fIN = 1 kHz, VREF = 5 V 95.5 98 dB3 fIN = 1 kHz, VREF = 2.5 V 92.5 dB3 Spurious-Free Dynamic Range (SFDR) fIN = 10 kHz −115 dB3 Total Harmonic Distortion5 (THD) fIN = 10 kHz −120 dB3 Signal-to-Noise-and-Distortion (SINAD) fIN = 1 kHz, VREF = 5 V 97 dB3 1 LSB means least significant bit. With the ±5 V input range, 1 LSB is 38.15 μV. 2 See Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference. 3 All specifications expressed in decibels are referred to a full-scale input range (FSR )and tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 4 Dynamic range is obtained by oversampling the ADC running at a throughput FS of 1 MSPS followed by postdigital filtering with an output word rate of FO. 5 Tested fully in production at fIN = 1 kHz. |
Аналогичный номер детали - AD7982 |
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Аналогичное описание - AD7982 |
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