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AD7783BRU-REEL Fiches technique(PDF) 2 Page - Analog Devices |
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AD7783BRU-REEL Fiches technique(HTML) 2 Page - Analog Devices |
2 / 12 page REV. B –2– AD7783–SPECIFICATIONS1 (V DD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V; REFIN(–) = GND; GND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications TMIN to TMAX, unless otherwise noted.) Parameter AD7783B Unit Test Conditions ADC CHANNEL SPECIFICATION Output Update Rate 19.79 Hz nom ADC CHANNEL No Missing Codes 2 24 Bits min Resolution 16 Bits p-p ±160 mV Range, RANGE = 0 18 Bits p-p ±2.56 V Range, RANGE = 1 Output Noise See Table I Integral Nonlinearity ±10 ppm of FSR max Typically 2 ppm, Offset Error ±3 mV typ AIN(+) = AIN(–) = 2.5 V Offset Error Drift versus Temperature ±10 nV/ ∞C typ Full-Scale Error ±10 mV typ VDD = 3 V Gain Drift versus Temperature ±0.5 ppm/ ∞C typ Power Supply Rejection (PSR) 100 dB typ Input Range = ±160 mV, VIN = 1/16 V 85 dB typ Input Range = ±2.56 V, VIN = 1 V ANALOG INPUTS Differential Input Voltage Ranges ±160 mV nom Range = 0 ±2.56 V nom Range = 1 ADC Range Matching ±2 mV typ Input Voltage = 159 mV on Both Ranges Absolute AIN Voltage Limits GND + 100 mV V min VDD – 100 mV V max Analog Input Current 2 DC Input Current ±1nA max DC Input Current Drift ±5pA/∞C typ Normal-Mode Rejection 2, 3 @ 50 Hz 60 dB min 50 Hz ± 1 Hz @ 60 Hz 94 dB min 60 Hz ± 1 Hz Common-Mode Rejection Input Range = ±160 mV, VIN = 1/16 V @ DC 105 dB min 125 dB typ, 110 dB typ when Input Range = ±2.56 V @ 50 Hz 2 100 dB min 50 Hz ± 1 Hz @ 60 Hz 2 100 dB min 60 Hz ± 1 Hz REFERENCE INPUT REFIN Voltage 2.5 V nom REFIN = REFIN(+) – REFIN(–) REFIN Voltage Range 2 1V min VDD V max Absolute REFIN Voltage Limits 2 GND – 30 mV V min VDD + 30 mV V max Average Reference Input Current 0.5 mA/V typ Average Reference Input Current Drift ±0.01 nA/V/ ∞C typ Normal-Mode Rejection 2, 3 @ 50 Hz 60 dB min 50 Hz ± 1 Hz @ 60 Hz 94 dB min 60 Hz ± 1 Hz Common-Mode Rejection Input Range = ±160 mV, VIN = 1/16 V @ DC 100 dB typ @ 50 Hz 110 dB typ 50 Hz ± 1 Hz @ 60 Hz 110 dB typ 60 Hz ± 1 Hz EXCITATION CURRENT SOURCES (IEXC1, IEXC2) Output Current 200 mA Initial Tolerance at 25 ∞C ±10 % typ Drift 200 ppm/ ∞C typ Initial Current Matching at 25 ∞C ±2.5 % max No Load Drift Matching 20 ppm/ ∞C typ Line Regulation 2.5 mA/V max VDD = 5 V ± 5%. Typically 1.25 mA/V. Load Regulation 300 nA/V typ Output Compliance VDD – 0.6 V max GND – 30 mV V min FSR REFIN Gain = ¥ 21 024 . |
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