AD9854ASTZ

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Direct Digital Synthesis (DDS), is a technique used to generate a precisely calibrated signal with very high resolution. It is used in various fields such as instrumentation, test and measurement, communication, automated production, and multimedia systems. AD9854ASTZ is a direct digital synthesizer chip used in a variety of demanding applications.

The AD9854ASTZ is a high-performance, integrated design that includes a high-performance analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a phase-locked loop (PLL) to build a complete direct digital synthesizer. The integrated design of this device ensures excellent performance in a wide range of applications and is available in different package types including SMD, VQFN, and LGA.

The AD9854ASTZ uses a PLL-based architecture in order to achieve high frequency stability and accuracy. In this architecture, an input reference frequency is used to generates a high-resolution output frequency. The reference frequency is multiplied by a coefficient that is pre-programmed in the device and sent to the DAC which in turn produces the desired frequency. It also enables advanced features such as frequency transmission, frequency hopping, and frequency modulation.

The AD9854ASTZ has a built-in PLL (Phase Locked Loop) that is typically used to lock onto an external clock or to a Frequency Reference Clock provided on the data sheet. The use of the PLL ensures a highly accurate and stable output frequency. Additionally, this device can be configured to operate in a one- or two-phase architecture with user-defined phase resolution. The two-phase architecture is the best choice for generating low-jitter signals with fast frequency settling in variable frequency applications such as those found in communication systems.

The DAC in the AD9854ASTZ can generate high-resolution PWM (pulse width modulation) signals, which can be used for pulse-width modulation (PWM) frequency synthesis. This feature makes it ideal for applications including motor control, sine wave synthesis, arbitraries, and high-resolution frequency modulation (FM). The high-resolution PWM feature allows the user to obtain high-precision control of the output frequency in a variety of frequency scaling techniques such as amplitude scaling, phase scaling, and linear frequency modulation.

The AD9854ASTZ is well suited for applications requiring ultra-low power consumption such as portable electronic devices, emulators, synthesizers, radios, and medical instrumentation. With a 0.7V to 1.4V supply voltage and sleep mode enabled, this device consume less than 18 mW. By utilizing the internal PLL and on-chip control features, the power consumption is further reduced. The device can run from a fast charge pump, enabling it to generate output frequencies over a wide range – from frequencies down to 1 Hz up to frequencies over 100MHz.

The AD9854ASTZ is a flexible and powerful device that can be used in a variety of applications. It offers exceptional performance and features, enabling designers to quickly and easily create high-performance systems that are sure to meet their needs. With its low power consumption, wide frequency range, and high resolution PWM capabilities, it is an ideal choice for applications requiring precise frequency control.

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