DAC7811IDGST

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Introduction

The DAC7811IDGST is a Data Acquisition - Digital to Analog Converters (DAC) device; it is an 8-bit monolithic current output Digital-to-Analog Converter (DAC). This device is designed to interpret digital words as analog current outputs. The maximum current output is +/- 1.25 mA. It is available in fixed voltage and current output versions.

Application Field

The DAC7811IDGST is a low-power converter capable of driving the following applications:

• Thermal control
• Motor control
• Monitoring feedback signals from sensors
• Supplying loads through current sources
• Low frequency voltage application

Working Principle

The DAC7811IDGST is a low-power 8-bit monolithic current output Digital-to-Analog Converter (DAC). It is a current-output device that takes in a digital value and converts it to a corresponding voltage or current output. When a digital value is inputted into the device, it is first decoded into an 8-bit resolution, which is used to generate the corresponding output. The output of the DAC is controlled by a latch in the device. This latch is responsible for reading the input data, decoding it and generating the corresponding current output.

The device is capable of generating two opposing current outputs for each input bit. To generate the two opposing currents, two onboard Vrefs (voltage references) are required. One of these Vrefs is used to generate the positive current output, while the other is used to generate the negative current output. The Vrefs are then connected to a current mirror circuit, which is used to generate the desired output current levels.

The output current is controlled by a Digital-to-Analog Control Register (D-ACR). This D-ACR stores the output data, which is then used to generate the output current. The D-ACR is also used to set the output range of the DAC, which can be adjusted from 0mA to +/-1.25mA.

The DAC7811IDGST also has an Output Enable pin, which is used to enable or disable the output of the device. When the enable pin is low, the device is disabled and no output is generated. When the enable pin is high, the device is enabled and the corresponding current output is generated.

Conclusion

In conclusion, the DAC7811IDGST is an 8-bit monolithic current output Digital-to-Analog Converter (DAC). It is a low-power device capable of generating current outputs from 0mA to +/-1.25mA. It is designed to interpret digital words as analog current outputs and is ideal for use in applications such as thermal control, motor control, monitoring feedback signals, and supplying loads through current sources.

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