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AD7985 Datasheet(PDF) 3 Page - Analog Devices |
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AD7985 Datasheet(HTML) 3 Page - Analog Devices |
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3 / 28 page  AD7985 Rev. 0 | Page 3 of 28 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 16 Bits ANALOG INPUT Voltage Range (IN+) − (IN−) 0 VREF V Absolute Input Voltage IN+ −0.1 VREF + 0.1 V IN− −0.1 +0.1 V Leakage Current at 25°C Acquisition phase 250 nA Input Impedance See the Analog Inputs section ACCURACY No Missing Codes 16 Bits Differential Nonlinearity Error, DNL −0.99 ±0.50 +0.99 LSB1 Integral Nonlinearity Error, INL −1.50 ±0.7 +1.50 LSB1 Transition Noise 0.8 LSB1 Gain Error, TMIN to TMAX2 −15 ±2 +15 LSB1 Gain Error Temperature Drift ±0.8 ppm/°C Zero Error, TMIN to TMAX2 −0.99 ±0.08 +0.99 mV Zero Temperature Drift 0.55 ppm/°C Power Supply Sensitivity AVDD = 2.5 V ± 5% 90 dB3 THROUGHPUT Conversion Rate 0 2.5 MSPS Transient Response Full-scale step 100 ns AC ACCURACY Dynamic Range VREF = 4.096 V, internal reference 87.5 89 dB3 VREF = 5.0 V, external reference 89.0 90 dB3 Signal-to-Noise Ratio, SNR fIN = 20 kHz, VREF = 4.096 V, internal reference 87.0 88.5 dB3 fIN = 20 kHz, VREF = 5.0 V, external reference 89.0 90.0 dB3 Spurious-Free Dynamic Range, SFDR fIN = 20 kHz 103 dB3 Total Harmonic Distortion4, THD fIN = 20 kHz, VREF = 4.096 V, internal reference −100 dB3 Signal-to-Noise-and-Distortion Ratio, SINAD fIN = 20 kHz, VREF = 4.096 V 90.5 dB3 SAMPLING DYNAMICS −3 dB Input Bandwidth 19 MHz Aperture Delay 0.7 ns 1 LSB means least significant bit. With the ±4.096 V input range, one LSB is 62.5 μV. 2 See the 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 FSR and tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 4 Tested fully in production at fIN = 1 kHz. |
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