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EVAL-ADUC834QS Datasheet(PDF) 4 Page - Analog Devices |
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EVAL-ADUC834QS Datasheet(HTML) 4 Page - Analog Devices |
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4 / 80 page  REV. A –4– ADuC834 Parameter ADuC834 Test Conditions/Comments Unit INTERNAL REFERENCE ADC Reference Reference Voltage 1.25 ± 1% Initial Tolerance @ 25 °C, VDD = 5 V V min/max Power Supply Rejection 45 dBs typ Reference Tempco 100 ppm/ °C typ DAC Reference Reference Voltage 2.5 ± 1% Initial Tolerance @ 25 °C, VDD = 5 V V min/max Power Supply Rejection 50 dBs typ Reference Tempco ± 100 ppm/ °C typ ANALOG INPUTS/REFERENCE INPUTS Primary ADC Differential Input Voltage Ranges 9, 10 External Reference Voltage = 2.5 V RN2, RN1, RN0 of ADC0CON Set to Bipolar Mode (ADC0CON3 = 0) ± 20 0 0 0 (Unipolar Mode 0 mV to 20 mV) mV ± 40 0 0 1 (Unipolar Mode 0 mV to 40 mV) mV ± 80 0 1 0 (Unipolar Mode 0 mV to 80 mV) mV ± 160 0 1 1 (Unipolar Mode 0 mV to 160 mV) mV ± 320 1 0 0 (Unipolar Mode 0 mV to 320 mV) mV ± 640 1 0 1 (Unipolar Mode 0 mV to 640 mV) mV ± 1.28 1 1 0 (Unipolar Mode 0 V to 1.28 V) V ± 2.56 1 1 1 (Unipolar Mode 0 V to 2.56 V) V Analog Input Current 2 ± 1TMAX = 85°CnA max ± 5TMAX = 125°CnA max Analog Input Current Drift ± 5TMAX = 85°CpA/°C typ ± 15 TMAX = 125°CpA/°C typ Absolute AIN Voltage Limits 2 AGND + 100 mV V min AVDD – 100 mV V max Auxiliary ADC Input Voltage Range 9, 10 0 to VREF Unipolar Mode, for Bipolar Mode V See Note 11 Average Analog Input Current 125 Input Current Will Vary with Input nA/V typ Average Analog Input Current Drift 2 ± 2 Voltage on the Unbuffered Auxiliary ADC pA/V/ °C typ Absolute AIN Voltage Limits 2, 11 AGND – 30 mV V min AVDD + 30 mV V max External Reference Inputs REFIN(+) to REFIN(–) Range 2 1V min AVDD V max Average Reference Input Current 1 Both ADCs Enabled A/V typ Average Reference Input Current Drift ± 0.1 nA/V/ °C typ ‘NO Ext. REF’ Trigger Voltage 0.3 NOXREF Bit Active if VREF < 0.3 V V min 0.65 NOXREF Bit Inactive if VREF > 0.65 V V max ADC SYSTEM CALIBRATION Full-Scale Calibration Limit +1.05 FS V max Zero-Scale Calibration Limit –1.05 FS V min Input Span 0.8 FS V min 2.1 FS V max ANALOG (DAC) OUTPUT Voltage Range 0 to VREF DACRN = 0 in DACCON SFR V typ 0 to AVDD DACRN = 1 in DACCON SFR V typ Resistive Load 10 From DAC Output to AGND k Ω typ Capacitive Load 100 From DAC Output to AGND pF typ Output Impedance 0.5 Ω typ ISINK 50 A typ TEMPERATURE SENSOR Accuracy ± 2 °C typ Thermal Impedance ( JA)90 MQFP Package °C/W typ 52 CSP Package (Base Floating) 12 °C/W typ SPECIFICATIONS (continued) |
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