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AD9684-500EBZ Datasheet(PDF) 3 Page - Analog Devices |
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AD9684-500EBZ Datasheet(HTML) 3 Page - Analog Devices |
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3 / 64 page  Product Overview Online Documentation Design Resources Discussion Sample & Buy Data Sheet AD9684 Rev. 0 | Page 3 of 64 The AD9684 has several functions that simplify the automatic gain control (AGC) function in a communications receiver. The programmable threshold detector allows monitoring of the incoming signal power using the fast detect output bits of the ADC. If the input signal level exceeds the programmable threshold, the fast detect indicator goes high. Because this threshold indicator has low latency, the user can quickly reduce the system gain to avoid an overrange condition at the ADC input. In addition to the fast detect outputs, the AD9684 also offers signal monitoring capability. The signal monitoring block provides additional information about the signal that the ADC digitized. The dual ADC output data is routed directly to the one external, 14-bit LVDS output port, supporting double data rate (DDR) formatting. An external data clock and status bit are offered for data capture flexibility. The LVDS outputs have several configurations, depending on the acceptable rate of the receiving logic device and the sampling rate of the ADC. Multiple device synchronization is supported through the SYNC± input pins. The AD9684 has flexible power-down options that allow significant power savings when desired. All of these features can be programmed using a 1.8 V to 3.4 V capable 3-wire serial port interface (SPI). The AD9684 is available in a Pb-free, 196-ball ball grid array (BGA) and is specified over the −40°C to +85°C industrial temperature range. This product is protected by a U.S. patent. PRODUCT HIGHLIGHTS 1. Wide full power bandwidth supports intermediate frequency (IF) sampling of signals up to 2 GHz. 2. Buffered inputs with programmable input termination ease filter design and implementation. 3. Four integrated wideband decimation filters and NCO blocks supporting multiband receivers. 4. Flexible SPI controls various product features and functions to meet specific system requirements. 5. Programmable fast overrange detection and signal monitoring. 6. SYNC± input allows synchronization of multiple devices. 7. 12 mm × 12 mm, 196-ball BGA_ED. |
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