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AD7685BCPZRL7 bảng dữ liệu(PDF) 4 Page - Analog Devices |
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4 / 29 page Data Sheet AD7685 SPECIFICATIONS VDD = 2.3 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted. Table 2. A Grade B Grade C Grade Parameter Test Conditions Min Typ Max Min Typ Max Min Typ Max Unit RESOLUTION 16 16 16 Bits ANALOG INPUT Voltage Range IN+ − IN− 0 VREF 0 VREF 0 VREF V Absolute Input Voltage IN+ −0.1 VDD + 0.1 −0.1 VDD + 0.1 −0.1 VDD + 0.1 V IN− −0.1 +0.1 −0.1 +0.1 −0.1 +0.1 V Analog Input CMRR fIN = 250 kHz 65 65 65 dB Leakage Current at 25°C Acquisition phase 1 1 1 nA Input Impedance See the Analog Inputs section See the Analog Inputs section See the Analog Inputs section ACCURACY No Missing Codes 15 16 16 Bits Differential Linearity Error −1 ±0.7 −1 ±0.5 +1.5 LSB1 Integral Linearity Error −6 +6 −3 ±1 +3 −2 ±0.6 +2 LSB Transition Noise REF = VDD = 5 V 0.5 0.5 0.45 LSB Gain Error2, TMIN to TMAX ±2 ±30 ±2 ±30 ±2 ±15 LSB Gain Error Temperature Drift ±0.3 ±0.3 ±0.3 ppm/°C Offset Error2, TMIN to TMAX VDD = 4.5 V to 5.5 V ±0.1 ±1.6 ±0.1 ±1.6 ±0.1 ±1.6 mV VDD = 2.3 V to 4.5 V ±0.7 ±3.5 ±0.7 ±3.5 ±0.7 ±3.5 mV Offset Temperature Drift ±0.3 ±0.3 ±0.3 ppm/°C Power Supply Sensitivity VDD = 5 V ± 5% ±0.05 ±0.05 ±0.05 LSB THROUGHPUT Conversion Rate VDD = 4.5 V to 5.5 V 0 250 0 250 0 250 kSPS VDD = 2.3 V to 4.5 V 0 200 0 200 0 200 kSPS Transient Response Full-scale step 1.8 1.8 1.8 µs AC ACCURACY Signal-to-Noise Ratio fIN = 20 kHz, VREF = 5 V 90 90 92 91.5 93.5 dB3 fIN = 20 kHz, VREF = 2.5 V 86 86 88 87.5 88.5 dB Spurious-Free Dynamic Range fIN = 20 kHz −100 −106 −110 dB Total Harmonic Distortion fIN = 20 kHz −100 −106 −110 dB Signal-to-(Noise + Distortion) fIN = 20 kHz, VREF = 5 V 89 90 92 91.5 93.5 dB fIN = 20 kHz, VREF = 5 V, −60 dB input 32 33.5 dB fIN = 20 kHz, VREF = 2.5 V 86 85.5 87.5 87 88.5 dB Intermodulation Distortion4 −110 −115 dB 1 LSB means least significant bit. With the 5 V input range, 1 LSB is 76.3 µV. 2 See 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 FS. 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. D | Page 3 of 28 |
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