Dual ADCs feature an on-chip buffer and a sample-and-hold circuit

03-08-2015 | Analog Devices | Semiconductors

Analog Devices' AD9684 14-Bit 500MSPS LVDS dual analog-to-digital converters (ADCs) are now available from Mouser stock. The devices feature an on-chip buffer and a sample-and-hold circuit designed for low power, small size, and ease-of-use. The AD9684 ADCs provide a high sampling rate for wide bandwidth analog signals, high linearity, and low power in a small 12mm x 12mm, 196-ball ball grid array (BGA) package. Optimized for wide input bandwidth, the AD9684 supports intermediate frequency (IF) sampling of signals up to 2GHz. The programmable threshold detector monitors incoming signal power using the fast detect output bits of the ADC. Because this threshold indicator has low latency, the designer can quickly reduce the system gain to avoid an over-range condition at the ADC input. The dual ADC output data is routed directly to the external 14-bit LVDS output port that supports double data rate (DDR) formatting. The SYNC± input pins support multiple device synchronization. In addition, the AD9684 offers flexible power-down options for significant power savings. Designers can program all of the AD9684 features using a 1.8V to 3.4V capable 3-wire serial port interface (SPI). Specified to operate over the -40C to +85C industrial temperature range, AD9684 ADCs are well-suited for communications, diversity multiband, multimode digital receivers, 3G/4G, TD-SCDMA, W-CDMA, MC-GSM, LTE, general-purpose software radios, ultra-wideband satellite receiver, instrumentation (spectrum analyzers, network analyzers, integrated RF test solutions), radar, digital oscilloscopes, high speed data acquisition systems, DOCSIS CMTS upstream receiver paths, and HFC digital reverse path receivers, says the company.

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