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Применения > > Precision, Bipolar, Configuration for the AD5450/1/2/3 8-14bit Multiplying DACs

Precision, Bipolar, Configuration for the AD5450/1/2/3 8-14bit Multiplying DACs (CN0053)

This circuit is a bipolar, precision DAC configuration that employs anAD5450/AD5451/AD5452/AD5453 precision multiplying DAC and the AD8066 low-noise op-amp. The DAC is the core-programmable element, and the amplifier selection dictates the performance in terms of precision or speed. For an accurate, high precision, low noise application, a dual opera-tional amplifier (op amp) such as the AD8066 can be used to provide the current-to-voltage conversion and the signal conditioning. A low noise reference such as ADR01 is required to drive the VREF input and the optimum output noise performance is obtained by using a low noise low bandwidth output amplifier. The main advantages of this circuit are simplicity, constant reference input impedance, and the ability of VREF to exceed the DAC VDD supply voltage.



Figure 1: Bipolar Precision DC Conversion (Simplified Schematic: Decoupling and All Connections Not Shown)

Возможности

  • Precision multiplying DAC
  • Bipolar output topology
  • Programmable output levels

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