AD9680是一款双通道、14位、1 GSPS
analog-to-digital converter(ADC)。 该器件内置片内缓冲器和采样保持电路，专门针对低功耗、小尺寸和易用性而设计。 该器件设计用于高达2 GHz的宽带模拟信号采样。 AD9680针对宽输入带宽、高采样速率、出色的线性度和小封装低功耗而优化。
This dual-channel ADC core adopts a multi-level, differential pipeline architecture and integrates output error correction logic. Each ADC has a wide bandwidth input that supports a variety of user-selectable input ranges. Integrated voltage reference simplifies design.
Both the analog input and clock signals are differential input signals. Each ADC data output is internally connected to two digital downconverters (DDCs). Each DDC contains four cascading signal processing stages: a 12-bit frequency converter (NCO) and four half-band extraction filters.
In addition to the DDC module, the AD9680 also has additional features that simplify automatic gain control (AGC) for communication receivers. Using the ADC's fast detection output bit, the programmable threshold detector monitors the input signal power. If the input signal level exceeds the programmable threshold, the quick detection indicator becomes high. Because the threshold indicator has a very low latency, users can quickly adjust down the system gain to avoid over-range at the ADC input.
Users can configure subclass 1 JESD204B high-speed serial outputs to 1, 2, or 4 channels, depending on the DDC configuration and the acceptable channel rate of the receiving logic device. Multi-device synchronization support is available via SYSREF± and SYNCINB ± input pins.
The AD9680 has flexible power-down options that significantly reduce power consumption when needed. These features are programmable via a 1.8 V to 3.3 V three-wire SPI.
The AD9680 is available in a 64-pin lead-free LFCSP package and is rated for an industrial temperature range of −40 °C to +85 °C. The product is protected by a U.S. patent.
Product features:
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全功率宽带宽特性支持高达2 GHz的IF信号采样。
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带可编程输入端接的缓冲输入简化滤波器设计和部署。
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四个集成式宽带抽取滤波器和数控振荡器(NCO)模块支持多频段接收器。
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灵活的串行端口接口(SPI)控制各种产品特性和功能，满足特定系统要求。
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可编程快速超量程检测。
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9mm x 9mm 64引脚LFCSP封装
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通信
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分集多频段、多模数字接收器
3G/4G、TD-SCDMA、W-CDMA、GSM、LTE
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通用软件无线电
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超宽带卫星接收器
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仪器仪表
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雷达
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信号情报(SIGINT)
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DOCSIS 3.0 CMTS上游接收路径
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HFC数字反向路径接收器