AD7391AN

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Data Acquisition - Digital to Analog Converters (DAC) include the AD7391AN application field and working principle. The ADC7391AN is an 8-channel, 18-bit, microprocessor-controlled, Digital to Analog Converter (DAC). It provides excellent voltage resolution, accuracy, and reliability for a wide range of applications, from industrial automation to medical imaging.

The AD7391AN is an 8-channel digital to analog converter that combines the technology of a 16-bit digital-to-analog converter with an on-chip DSP (Digital Signal Processor) to produce an 18-bit digital-to-analog converter with digital signal conditioning. The AD7391AN uses two digital-to-analog (DAC) cores, each with a resolution of 8 bits and an accuracy of 14 bits. The DACs are configured to produce a single 18-bit output.

The AD7391AN is ideal for applications such as programmable gain amplifiers, medical equipment, power management, automotive applications, image processing and industrial control. It features 16-bit plus 2-bit gain. The user can program the gain to achieve signal conditioning levels required by the application. The on-chip DSP can also be programmed to perform signal conditioning.

The working principle of the AD7391AN is based on an interpolative, delta-sigma architecture with 16-bit plus 2-bit gain. In this architecture, a 16-bit digital input is compared to a 16-bit digital reference voltage. The comparison is performed by two analog comparators. The comparator outputs are combined to form a one-bit digital-to-analog signal. This signal is then amplified by a programmable gain amplifier and converted to a 16-bit digital signal. The two bit gain enables the user to further adjust the gain of the signal. The output from the programmable gain amplifier is converted to a 16-bit digital signal and sent to the data bus. The data bus performs the signal conversion and sends the 16-bit digital signal to the DAC. The DAC converts the 16-bit digital signal to a 16-bit analog signal. The signal is then amplified by an analog amplifier and sent to the output terminals.

The AD7391AN can also be configured in a Multiple Digital to Analog Configuration (MDAC) mode. In this mode, up to eight independent 16-bit DACs can be combined in a single unit. This configuration allows for higher resolution output, reliability and power efficiency. The MDAC configuration also eliminates the need for external components, saving costs and space.

The AD7391AN is a versatile and cost-effective digital-to-analog converter that is suitable for a variety of applications. It features high resolution, accuracy and reliability, making it an ideal choice for a wide range of applications. The on-chip DSP enables user-programmed signal conditioning, allowing the user to customize the output signal in order to meet the requirements of each application. The MDAC configuration also allows for higher resolution output and increases the power efficiency. Furthermore, the AD7391AN is easy to use and efficient, making it an ideal choice for any digital-to-analog application.

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