AD9911: 500 MSPS直接数字频率合成器，内置10位DAC
AD9911是一款完整的直接数字频率合成器(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。AD9911内置一个集成式高速10位DAC，具有出色的宽带和窄带无杂散动态范围(SFDR)。该器件还提供一个32位频率调谐字、14位相位偏移和一个10位输出量程乘法器。AD9911能对频率、相位或振幅执行最多16级调制（FSK、PSK、ASK），通过将数据施加于侧面(profile)引脚进行调制。此外，AD9911还支持频率、相位或振幅线性扫描，适合雷达和仪器仪表等应用。AD9911的串行I/O端口具有多种配置，可提供极大的灵活性。串行I/O端口提供SPI兼容工作模式，它实际上与ADI公司早期DDS产品的SPI工作模式相同。四个数据引脚(SDIO_0:3)则可提供灵活性，能够以四种可编程串行I/O模式工作。DAC输出以电源作为基准电压，必须通过一个电阻或一个AVDD中心抽头变压器端接于AVDD。DAC具有自己的可编程基准电压，能够实现不同的满量程电流。
DDS可充当一个高分辨率分频器，以REF_CLK作为输入，DAC则提供输出。REF_CLK输入可以直接驱动，也可以结合速度最高为500 MSPS的集成式REF_CLK乘法器(PLL)使用。PLL乘法系数可按整数步进在4至20范围内编程。REF_CLK输入还具有一个振荡器电路，可采用外部晶体作为REF_CLK源。晶体的工作频率必须在20 MHz至30 MHz范围内，可以结合REF_CLK乘法器使用。AD9911采用节省空间的56引脚LFCSP封装。DDS内核（AVDD和DVDD引脚）采用1.8 V电源供电。数字I/O接口(SPI)采用3.3 V电源供电，要求标有DVDD_I/O的引脚（引脚49）连接3.3 V电源。AD9911的工作温度范围为−40°C至+85°C工业温度范围。
The AD9911 consists of one complete direct digital synthesizer (DDS) that operates up to 500MSPS. In addition, there also exist three auxiliary DDS cores without assigned DACs. These auxiliary channels may be used for either spur reduction or test tone modulation.The AD9911 incorporates an integrated high speed, 10-bit DAC with excellent wideband and narrowband SFDR. The device offers a 32-bit frequency tuning word, 14-bits of phase offset, and a 10-bit output scale multiplier.The AD9911 can perform up to a 16-level modulation of frequency, phase, or amplitude (FSK, PSK, ASK). Modulation is performed by applying data to the profile pins. In addition, the AD9911 also supports linear sweep of frequency, phase, or amplitude for applications such as radar and instrumentation.
The AD9911 serial I/O port offers multiple configurations to provide significant flexibility. The serial I/O port offers an SPIcompatible mode of operation that is virtually identical to the SPI operation found in earlier Analog Devices DDS products. Flexibility is provided by four data pins (SDIO_0:3) that allow four programmable modes of serial I/O operation. The DAC output is supply referenced and must be terminated into AVDD by a resistor or an AVDD center-tapped transformer. The DAC has its own programmable reference to enable different full-scale currents.The DDS acts as a high resolution frequency divider with the REF_CLK as the input and the DAC providing the output. The REF_CLK input can be driven directly or used in combination with an integrated REF_CLK multiplier (PLL) up to a maximum of 500 MSPS. The PLL multiplication factor is programmable from 4 to 20, in integer steps. The REF_CLK input also features an oscillator circuit to support an external crystal as the REF_CLK source. The crystal must be between 20 MHz and 30 MHz. The crystal can be used in combination with the REF_CLK multiplier.The AD9911 comes in a space-saving 56-lead LFCSP package. The DDS core (AVDD and DVDD pins) is powered by a 1.8 V supply. The digital I/O interface (SPI) operates at 3.3 V and requires the pin labeled DVDD_I/O (Pin 49) be connected to 3.3 V.The AD9911 operates over the industrial temperature range of −40°C to +85°C.
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订购指南
| 产品型号 | 封装 | 引脚 | 温度范围 | 包装和数量 | 报价*(100-499) | 报价*1000 pcs | RoHS |
|---|---|---|---|---|---|---|---|
| AD9911BCPZ 产品状态: 量产 | 56 ld LFCSP (8x8mm) | 56 | 工业 | Tray, 260 | $ 18.46 | $ 15.69 | Y 材料信息 |
| AD9911BCPZ-REEL7 产品状态: 量产 | 56 ld LFCSP (8x8mm) | 56 | 工业 | Reel, 750 | $ 18.46 | $ 15.69 | Y 材料信息 |
开发工具
| 产品型号 | 描述 | 报价 | RoHS |
|---|---|---|---|
| AD9911/PCBZ 产品状态: 量产 | Evaluation Board | $ 400.00 | 是 |
