AN60305 - Using PSoC® 3 and PSoC 5LP IDACs to Build a Better VDAC | サイプレス セミコンダクタ
AN60305 - Using PSoC® 3 and PSoC 5LP IDACs to Build a Better VDAC
This application note describes how to configure the PSoC® 3 and PSoC 5LP IDACs as a flexible analog source. It presents different approaches for using the IDACs in applications, and discusses the advantages and disadvantages of the topologies presented. This application note will: help you to understand compliance voltage and why it is important; explain how to generate an any range or any ground VDAC; describe an implementation for a multiplying VDAC; give details on how to build a rail-to-rail low-output impedance 9-bit VDAC from a single IDAC, an opamp, and a resistor; and provide information on how to build a current scaling circuit with an opamp and two resistors.