AD569AD

Data Acquisition - Digital to Analog Converters (DAC)

The AD569A is a monolithic 10-bit digital-to-analog converter. This voltage output DAC operates from 2.5V to 5.5V supplies and is suitable for remote applications. It contains a precision, low-power bandgap reference with a nominal output of 2.5V ± 0.1V.

Application field of AD569A

The functional features make the AD569A suitable for numerous applications in systems/equipment such as portable computers, PDAs, automotive electronics, and industrial process control instrumentation. It excels in image processing and communication systems, such as line and column drivers, gamma correction, and serial interface. Furthermore, it supports various applications such as frequency-to-voltage conversion, adjustable impedance, and data acquisition.

Working principle of AD569A

The working principle of the AD569A is based on the use of a 10-bit DAC. This 10-bit DAC is made up of a set of switches (transistors or capacitors) that are used to produce an analog voltage. This analog voltage is related to the digital data applied to the DAC. The DAC of the AD569A is controlled by a 10-bit register which accepts digital data. When the data is applied to the register, it is converted by the DAC and an analog voltage is produced at the output of the device.

The output voltage is proportional to the digital code applied to the DAC input and is also referenced to the internal 2.5V reference. The AD569A outputs between 0V and the reference voltage. Therefore, the full scale output of the device is 2.5V, if the reference voltage is 2.5V. The output accuracy of the device is guaranteed to that of the reference voltage.