AD9857ASTZ

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AD9857ASTZ is a type of Radio Frequency (RF) Misc ICs and Modules primarily used in communications and data processing. It is an integrated circuit device designed for radio frequency applications. It typically combines several functions into one integrated circuit.

The AD9857ASTZ is a highly integrated, high-speed monolithic digital synthesizer in a small 28-pin QFN package. It is used in a wide range of applications from cellular base station to wireless local area networks (WLANs) and multimedia applications such as digital television (DTV) and digital video systems. The AD9857ASTZ has two outputs with adjustable frequency, power and phase. The outputs can be combined to provide higher-order output frequencies. The device also has a differential output stage and can be used for baseband modulation and/or low-IF applications.

The AD9857ASTZ operates over a wide temperature range and requires only a single +3.3 V power supply. It offers fast switching times and low-noise performance. It is suitable for application in cellular base station, WLAN, DTV, digital video systems, direct conversion receivers, cordless phones and satellite communication systems.

The AD9857ASTZ has a wide application field due to its wide operating frequency range. It can operate with a frequency range from 0.3 GHz up to 7.2 GHz with programmable output amplitude and phase. It can also be programmed via the on-chip serial port interface. The device has a maximum output at +3 dBm with +25 dB gain control range for each of the two outputs.

The working principle of AD9857ASTZ is relatively simple. The device contains an internal reference frequency oscillator (fq) which sets the fundamental frequency of operation, a cryptographic engine, a programmable digital signal processor (DSP) and a DAC. The fundamental frequency (fq) is divided down to lower frequencies by the DSP, and then to two or more outputs. The DAC then modulates the signals to vary the frequency, amplitude, phase and gain of the output. The on-chip crypto engine provides enhanced security for communications.

In conclusion, the AD9857ASTZ is a highly integrated RF IC which provides high-speed performance and low power consumption, and operates over a wide temperature range. It is suitable for applications in cellular base station, WLAN, DTV, digital video systems, direct conversion receivers, cordless phones and satellite communication systems. The AD9857ASTZ is both powerful and easy to use, with a wide application field due to its wide operating frequency range and programmable output components. Furthermore, the device has an integrated security engine, providing enhanced security for communications.

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