The AD9680 is a dual, 14-bit, 1 GSPS analog-to-digital converter (ADC). The device has an on-chip buffer and sample-and-hold circuit designed for low power, small size, and ease of use. This device is designed for sampling wide bandwidth analog signals of up to 2 GHz. The AD9680 is optimized for wide input bandwidth, high sampling rate, excellent linearity, and low power in a small package.
The dual ADC cores feature a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth inputs supporting a variety of user-selectable input ranges. An integrated voltage reference eases design considerations.
The analog input and clock signals are differential inputs. Each ADC data output is internally connected to two digital downconverters (DDCs). Each DDC consists of four cascaded signal processing stages: a 12-bit frequency translator (NCO), and four half-band decimation filters.
In addition to the DDC blocks, the AD9680 has several functions that simplify the automatic gain control (AGC) function in the 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 turn down the system gain to avoid an overrange condition at the ADC input.
Users can configure the Subclass 1 JESD204B-based high speed serialized output in a variety of one-, two-, or four-lane configurations, depending on the DDC configuration and the acceptable lane rate of the receiving logic device. Multiple device synchronization is supported through the SYSREF± and SYNCINB± input pins.
The AD9680 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 3.3 V capable 3-wire SPI.
The AD9680 is available in a Pb-free, 64-lead LFCSP and is specified over the −40°C to +85°C industrial temperature range. This product is protected by a U.S. patent.
|Title||Content Type||File Type|
|AD9680: 14-Bit, 1 GSPS/500 MSPS JESD204B, Dual Analog-to-Digital Converter Data Sheet (Rev A, 12/2014) (pdf, 1754 kB)||Data Sheets|
|MS-2708: GSPS Data Converters to the Rescue for Electronics Surveillance and Warfare Systems (pdf, 1144 kB)||Technical Articles|
|MS-2735: Maximizing the Dynamic Range of Software-Defined Radio (pdf, 351 kB)||Technical Articles|
|MS-2714: Understanding Layers in the JESD204B Specificaton: A High Speed ADC Perspective, Part 1 (pdf, 2140 kB)||Technical Articles|
|MS-2660: Understanding Spurious-Free Dynamic Range in Wideband GSPS ADCs (pdf, 370 kB)||Technical Articles|
|Analog Devices Introduces High-Performance RF ICs for Multi-band Base Stations and Microwave Point-to-Point Radios (03 Jun 2014)||Press Releases||HTML|
|Analog Devices Unveils New Class of Data Converters That Set 14-bit, GSPS Performance Standard (13 May 2014)||Press Releases||HTML|
|Glossary of EE Terms||Glossary||HTML|
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