AD7397ARZ-REEL

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The AD7397ARZ-REEL is a digital to analog converter (DAC) designed for low-voltage and low-power applications.

The device is a fast, low power, 12-bit voltage output DAC that operates with a 2.7V to 5.5V supply. It is available in a TSSOP-8 package.

The AD7397ARZ-REEL has a number of features that make it suitable for data acquisition applications in low-voltage, low-power environments.

Application Field

The AD7397ARZ-REEL is ideal for a variety of low-voltage, low-power applications where precision analog signals are needed. It is recommended for standard reference voltage applications in low-voltage systems, such as digital audio equipment, mini stereos, digital-to-analog converters, power supplies, automotive stereo systems, and more.

The device is also capable of accepting diverse input codes, and is flexible enough to allow for voltage-outputs from different resolution settings and integrated logic configurations.

In addition, the device is useful for automotive audio systems, where it allows for precise adjustment of bias voltages for equalization networks and for voltage scaling for microcontroller-based systems.

Working Principle

The AD7397ARZ-REEL operates on a parallel input DAC architecture, which shifts and stores data into an 8-bit wide shift register. The DAC is controlled via 3 pins and 2 input signals, which are then decoded into 12-bit parallel words.

The device processes the higher most significant 8-bits of the data words in 2’s complement format, while the lower 4-bits are held in zero scale compensation register and shared between each MSB group. This process is referred to as a Weighted Binary Code (WBC), which provides additional performance levels.

The AD7397ARZ-REEL features an on-board clock generating circuitry, allowing for an external clock frequency of up to 10 MHz. Moreover, the device features an active low reset pin for a device reset and for clearing the DAC input registers.

Moreover, the DAC has a high-impedance input stage, allowing for a variety of supply and reference voltages to be used. This stage is designed to minimize output offset drift and errors due to noise.

Conclusion

The AD7397ARZ-REEL is a low-voltage, low-power digital-to-analog converter that is suitable for a range of applications, including audio equipment, digital-to-analog converters, automotive stereo systems, and more. It utilizes an 8-bit wide shift register and a weight binary code, and also features on-board clock generating circuitry and an active low reset pin.

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