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AD7946 Scheda tecnica(PDF) 3 Page - Analog Devices |
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AD7946 Scheda tecnica(HTML) 3 Page - Analog Devices |
3 / 24 page Preliminary Technical Data AD7693 Rev. PrB | Page 3 of 24 SPECIFICATIONS VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted. Table 2. Parameter 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− 0 VREF/2 VREF/2 + 0.1 V Analog Input CMRR fIN = 250 kHz 65 dB Leakage Current at 25°C Acquisition phase 1 nA Input Impedance1 THROUGHPUT Conversion Rate 0 500 kSPS Transient Response Full-scale step 400 ns ACCURACY No Missing Codes 16 Bits Integral Linearity Error −0.65 ±0.25 +0.65 LSB Differential Linearity Error −0.5 ±0.2 +0.5 LSB2 Transition Noise REF = VDD = 5 V 0.16 LSB Gain Error3 -30 ±1.5 +30 LSB Gain Error Temperature Drift ±0.5 ppm/°C Zero Error3 −10 +10 LSB Zero Temperature Drift ±1 ppm/°C Power Supply Sensitivity VDD = 5 V ± 5% ±1 ppm AC ACCURACY Dynamic Range VREF = 5 V 96 96.5 dB4 Signal-to-Noise fIN = 1 kHz, VREF = 5 V 95.5 96 dB fIN = 1 kHz, VREF = 2.5 V 93 dB Spurious-Free Dynamic Range fIN = 1 kHz, VREF = 5 V −120 dB Total Harmonic Distortion fIN = 1 kHz, VREF = 5 V −120 dB Signal-to-(Noise + Distortion) fIN = 1 kHz, VREF = 5 V 95.5 96 dB Intermodulation Distortion5 TBD dB 1 See the Analog Inputs section. 2 LSB means least significant bit. With the ±5 V input range, one LSB is 152.6 μV. 3 See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference. 4 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. 5 fIN1 = 21.4 kHz and fIN2 = 18.9 kHz, with each tone at −7 dB below full scale. |
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