Analog Devices’ JESD204A Data Converters Reduce Power And Board Space In High-Speed Data And Communications Applications

The JESD204A industry serial interface standard reduces the number of data inputs/outputs between data converters and other devices, such as FPGAs (field-programmable gate arrays). Fewer interconnects simplifies layout and allows smaller form factor realization without impacting overall system performance. These attributes are important for a range of high-speed applications, including portable instrumentation, ultrasound equipment, radar, wireless infrastructure (GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA), and software-defined radios. For more information about the AD9644 dual 14-bit ADC, click here or to learn more about the AD9641 ADC, click here.

The AD9644 consumes 423 mW at 80 MSPS and features a multi-stage, differential-pipelined architecture with integrated output error correction logic. At 70 MHz and 80 MSPS, the AD9644 achieves an SNR (signal-to-noise ratio) of 73.7 dBFS and an SFDR (spurious-free dynamic range) of 92 dBc. The JESD204A coded data rate supports up to 1.6 Gbps per link and the AD9644 offers two output modes supporting a dedicated data link per ADC channel or a single shared data link for both ADC channels. Wide bandwidth differential sample-and-hold analogue input amplifiers support a variety of user-selectable input ranges while an integrated voltage reference eases design considerations. A duty cycle stabilizer is provided to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance. The AD9644 is available in a 48-lead LFCSP (7 mm x 7 mm) and is specified over the industrial temperature range of -40°C to +85°C.

AD9644 Dual 14-bit ADC Key Features

* 80 MSPS Sample Rates
* 14-Bit Resolution
* Two configurable serial outputs
* SNR: 73.7 dBFS at 70 MHz and 80 MSPS
* SFDR: 92 dBc at 70 MHz and 80 MSPS
* Low power: 212 mW/channel at 80 MSPS
* Single 1.8-V supply operation

As part of a complete signal chain, the AD9644 and AD9641 can be used with amplifiers, VGAs and clock drivers such as the ADL5562 3.3 GHz ultralow -distortion RF/IF differential amplifier, ADA4937-2 ultralow -distortion differential ADC driver, AD8372 programmable dual VGA, AD9510 clock distribution IC and AD9520 CMOS output clock generator with integrated VCO.

More Information, Samples and Tools

· For more information: http://www.analog.com/pr/AD9644 or http://www.analog.com/pr/AD9641

· For data sheet: click here

· For data converter design tools: http://www.analog.com/pr/ADC-Tools_7-28-10

· For more data converter information: visit http://www.analog.com/Data-Converters

Data Converters: Bridging the Analogue and Digital Worlds

More designers turn to Analog Devices than any other supplier for the high-performance conversion technology required to bridge the analogue and digital worlds in today’s myriad electronic systems. With the industry’s leading portfolio of ADCs (analogue-to-digital converters) and DACs (digital-to-analogue converters), Analog Devices’ converter products feature the right combination of sampling rates and accuracy with low noise, power, and price and small package size required by industrial, medical, automotive, communications, and consumer electronics. Online evaluation tools help customers quickly validate, select, and design in the optimal data converters to reduce design complexity, development schedules, and bill-of-material costs. To view ADI’s ADC selection guide, visit http://http://www.analog.com/ADCsearch. For ADC drivers, visit http://http://www.analog.com/ADC-Drivers. To view ADI’s DAC selection guide, visit http://http://www.analog.com/DACsearch.