选择合适的系列电压基准源的绝对精度电压输出
R>Design D Low cost, loose accuracy High absolute accuracy and precision One-time calibrated, low drift Low voltage, battery powered, moderate accuracy Consumer audio device Lab instrument Digital offset and gain adjustment Portable instrument None Annual (gain and offset) One-time factory (gain and offset) None 16LSB @ 10 bits (6-bit accuracy) 2LSB @ 14 bits (13-bit accuracy) 4LSB @ 12 bits (10-bit accuracy) 16LSB @ 12 bits (8-bit accuracy) 0.4% (4LSB @ 10 bits) Not critical due to gain calibration Not critical due to gain calibration 0.32% (3200ppm) 75ppm/°C 2ppm/°C 5ppm/°C 20ppm/°C 2.5V 2.5V 2.048V 1.25V 18kΩ 18kΩ 7kΩ (14kΩ||14kΩ shared reference inputs) 18kΩ Maximum Output Current Requirement (VREF/RMIN) 140µA max 140µA max 293µA max (dual DACs) 69µA max
Main Design Objectives
Example Application
DAC Calibration
Maximum Error Target
Estimated Initial Accuracy (from Step 2)
Estimated Tempco (from Step 2)
Reference Voltage(VREF) (from Step 1)
Minimum Reference Input Resistance from Data Sheet (RMIN)
Voltage-Reference Candidates (Initial Accuracy, Tempco, Output Curren
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