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AD7825BR bảng dữ liệu(PDF) 2 Page - Analog Devices |
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AD7825BR bảng dữ liệu(HTML) 2 Page - Analog Devices |
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2 / 20 page  –2– REV. B AD7822/AD7825/AD7829–SPECIFICATIONS Parameter Version B Unit Test Condition/Comment DYNAMIC PERFORMANCE fIN = 30 kHz. fSAMPLE = 2 MHz Signal to (Noise + Distortion) Ratio 1 48 dB min Total Harmonic Distortion1 –55 dB max Peak Harmonic or Spurious Noise 1 –55 dB max Intermodulation Distortion 1 fa = 27.3 kHz, fb = 28.3 kHz 2nd Order Terms –65 dB typ 3rd Order Terms –65 dB typ Channel-to-Channel Isolation 1 –70 dB typ fIN = 20 kHz DC ACCURACY Resolution 8 Bits Minimum Resolution for Which No Missing Codes Are Guaranteed 8 Bits Integral Nonlinearity (INL) 1 ±0.75 LSB max Differential Nonlinearity (DNL) 1 ±0.75 LSB max Gain Error1 ±2 LSB max Gain Error Match 1 ±0.1 LSB typ Offset Error 1 ±1 LSB max Offset Error Match1 ±0.1 LSB typ ANALOG INPUTS 2 See Analog Input Section VDD = 5 V ± 10% Input Voltage Span = 2.5 V VIN1 to VIN8 Input Voltage VDD V max 0 V min VMID Input Voltage VDD – 1.25 V max Default VMID = 1.25 V 1.25 V min VDD = 3 V ± 10% Input Voltage Span = 2 V VIN1 to VIN8 Input Voltage VDD V max 0 V min VMID Input Voltage VDD – 1 V max Default VMID = 1 V 1 V min VIN Input Leakage Current ±1 µA max VIN Input Capacitance 15 pF max VMID Input Impedance 6 k Ω typ REFERENCE INPUT VREF IN/OUT Input Voltage Range 2.55 V max 2.5 V + 2% 2.45 V min 2.5 V – 2% Input Current 1 µA typ 100 µA max ON-CHIP REFERENCE Nominal 2.5 V Reference Error ±50 mV max Temperature Coefficient 50 ppm/ °C typ LOGIC INPUTS Input High Voltage, VINH 2.4 V min VDD = 5 V ± 10% Input Low Voltage, VINL 0.8 V max VDD = 5 V ± 10% Input High Voltage, VINH 2 V min VDD = 3 V ± 10% Input Low Voltage, VINL 0.4 V max VDD = 3 V ± 10% Input Current, IIN ±1 µA max Typically 10 nA, VIN = 0 V to VDD Input Capacitance, CIN 10 pF max LOGIC OUTPUTS Output High Voltage, VOH ISOURCE = 200 µA 4 V min VDD = 5 V ± 10% 2.4 V min VDD = 3 V ± 10% Output Low Voltage, VOL ISINK = 200 µA 0.4 V max VDD = 5 V ± 10% 0.2 V max VDD = 3 V ± 10% High Impedance Leakage Current ±1 µA max High Impedance Capacitance 10 pF max (VDD = 3 V 10%, VDD = 5 V 10%, GND = 0 V, VREF IN/OUT = 2.5 V. All specifications –40 C to +85 C unless otherwise noted.) |
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