ADCs & DVGA combine for high performance & low power

11th May 2015

Barney Scott

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Texas Instruments has announced ADS54J60, the industry’s first 16-bit 1-GS/s ADC, achieving over 70dBFS SNR at 1GS/s, as well as its high density four-channel 14-bit 500MSP/s ADC, the ADS54J54. To optimise the signal chain, TI’s 4.5GHz LMH6401 fully differential DVGA offers the widest bandwidth with DC coupling and allows signal acquisition of low and high frequencies without the limitation of baluns used in AC-coupled systems.

These ADCs work together with the amplifier to provide the highest performance, lowest power and space savings in defense and aerospace, test and measurement, and communication infrastructure applications. TI will demonstrate these high-performance devices at the International Microwave Symposium (IMS) from 17th to 22nd in Phoenix, Arizona, at booth 2614.

The 16-bit 1GS/s ADS54J60 ADC and the 14-bit 500MS/s ADS54J54 allow higher frequencies with more accurate signal analysis. ADS54J60 offers more than 3dB better SNR (70dBFS at FIN=170MHz) compared to competitive ADCs, a low noise floor of -159dBFS/Hz, and SFDR of 86dBc. These enable high spectral purity and the ability to find weak signals in the presence of large, unwanted blockers.

ADS54J54 is 50% smaller than competitive ADCs, offering four channels in a 9mm² package, whilst ADS54J60 offers two channels in a 10mm² package. An integrated DDC offers programmable decimation or a bypass mode. Both ADCs offer the high-speed JESD204B serial data interface, which simplifies connections to processors, including the 66AK2L06 SoC and FPGAs. Both devices offer 20% lower power consumption than competitive ADCs.

A complete support suite is available for system designers, including samples, product EVMs and a data converter capture card and pattern generator. IBIS models are available for the ADCs and the amplifier, and a TINA-TI model is available for the amplifier. Support is available on the High Speed Data Converters Forum and the High Speed Amplifiers Forum in the TI E2ETM Community, where engineers can search for solutions, get help, share knowledge and solve problems with fellow engineers and TI experts.

The ADS54J54 is currently available for $500 in 1,000-unit quantities, whilst the ADS54J60 will be available in Q4 2015 for $705 in 1,000-unit quantities and the LMH6401 will be available in June 2015 for $10.95 in 1,000-unit quantities.