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Применения > > Precision 16-Bit, Bipolar Output Voltage Source with +12 V to В±5 V Supply

Precision 16-Bit, Bipolar Output Voltage Source with +12 V to В±5 V Supply (CN0183)

The circuit shown in Figure 1 provides a precision 16-bit, low drift bipolar voltage output of ±2.5 V and operates on a single +10 V to +15 V supply. The unipolar voltage outputs of the AD5668 octal denseDAC are amplified and level shifted by the AD8638 auto-zero op amps. The maximum drift contribution of the AD8638 is only 0.06 ppm/°C. The external REF192 reference ensures a maximum drift of 5 ppm/°C (E grade) and provides a low impedance pseudo ground for the AD8638 level gain and shifting circuit.

The circuit offers an efficient solution to a problem often encountered in systems with a single +12 V supply rail. Proper printed circuit board (PCB) layout and grounding techniques ensure that the ADP2300 switching regulator does not degrade the overall performance of the circuit.


Figure 1. Bipolar Output DAC Circuit with ±5 V Power Supplies

Возможности

  • Precision 16-bit voltage source
  • 8 Channels Self contained
  • +12V to +/- 5V supply

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