AD9911是一款完整的直接
Digital frequency synthesizers (DDS)，工作速度最高可达500 MSPS。此外，还包括三个无专用DAC的辅助DDS内核，这些辅助通道可用于减少杂散或测试音调制。
The AD9911 has an integrated, high-speed, 10-bit DAC with excellent wideband and narrowband, spurious dynamic range (SFDR). The device also offers a 32-bit frequency tuner, 14-bit phase offset, and a 10-bit output range multiplier.
The AD9911 can perform up to 16 levels of modulation (FSK, PSK, ASK) for frequency, phase, or amplitude by applying data to the profile pin. In addition, the AD9911 supports linear scanning of frequency, phase, or amplitude, making it suitable for applications such as radar and instrumentation.
The AD9911's serial I/O ports are available in a variety of configurations for maximum flexibility. The serial I/O ports offer SPI-compatible operating mode, which is virtually the same as the SPI operating mode of Analog Devices' earlier DDS products. The four data pins (SDIO_0:3) provide flexibility and can operate in four programmable serial I/O modes. The DAC output is based on the supply as a reference voltage and must be terminated to the AVDD via a resistor or an AVDD center tap transformer. The DAC has its own programmable reference and is capable of achieving different full-scale currents.
The DDS acts as a high-resolution crossover, with the REF_CLK as the input and the DAC providing the output. REF_CLK inputs can be driven directly or used in combination with an integrated REF_CLK multiplier (PLL) with speeds up to 500 MSPS. PLL multiplication factors can be programmed in integer steps from 4 to 20. REF_CLK input also features an oscillator circuit that employs an external crystal as a REF_CLK source. The crystal must operate at a frequency range of 20 MHz to 30 MHz and can be used in combination with REF_CLK multiplier.
The AD9911 is available in a space-saving 56-pin LFCSP package. The DDS cores (AVDD and DVD pins) are powered from a 1.8 V supply. The digital I/O interface (SPI) operates from a 3.3 V supply and requires a pin marked DVDD_I/o (pin 49) to be connected to a 3.3 V supply.
The AD9911 has an operating temperature range of −40°C to +85°C industrial temperatures.
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捷变本振
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测试与测量设备
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商用与业余无线电激励器
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雷达和声纳
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测试音生成