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Применения > > Automated Calibration Technique That Reduces the AD5360 16-Channel, 16-Bit DAC Offset Voltage to Less Than 1 mV

Automated Calibration Technique That Reduces the AD5360 16-Channel, 16-Bit DAC Offset Voltage to Less Than 1 mV (cn0123)

The circuit described in this document and shown in Figure 1 provides a method of calibrating that removes an unknown offset error. When using high precision, high resolution DACs in industrial process control and instrumentation applications, low offset is often a critical specification. The circuit uses built-in features of the AD5360 in conjunction with an external comparator and an operational amplifier to determine if the DAC output voltages are above or below a ground reference signal. With the amount of offset known, the user can adjust the codes sent to the DAC to null out the offset.

Figure 1. Autocalibration Circuit for AD5360 DAC That Reduces the Offset Voltage to Less Than 1 mV (Simplified Schematic: Decoupling and All Connections Not Shown).

Возможности

  • Automated calibration technique
  • Offset voltage less than 1 mV
  • Common industrial voltage output levels

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