Data conversion chipset for fastest wideband signal handling
ADS54J60 is the first 16-bit 1-Gample/sec analogue-to-digital converter (ADC) and the first to achieve over 70 dBFS signal-to-noise ratio (SNR) at 1-Gample/sec. TI also announced the highest density four-channel 14-bit 500-Mample/sec ADC, the ADS54J54. To optimise the signal chain, TI’s 4.5-GHz LMH6401 fully differential digital variable gain amplifier (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 defence and aerospace, test and measurement, and communication infrastructure applications.
Features of the ADS54J60 and ADS54J54 ADCs include:
Highest speed in their classes: The 16-bit 1-Gample/sec ADS54J60 ADC and the 14-bit 500-Mample/sec ADS54J54 allow higher frequencies with more accurate signal analysis.
Highest dynamic performance: ADS54J60 offers more than 3 dB better SNR (70 dBFS at FIN=170 MHz) compared to competitive ADCs, a low noise floor of -159 dBFS/Hz, and spurious-free dynamic range (SFDR) of 86 dBc. These enable high spectral purity and the ability to find weak signals in the presence of large, unwanted blockers.
High density: ADS54J54 is 50% smaller than competitive ADCs, offering four channels in a 9 x 9-mm package. ADS54J60 offers two channels in a 10 x 10-mm package.
Reduces the data interface speed and external processor resources: Integrated digital down converter (DDC) offers programmable decimation or a bypass mode.
Simplified board routing and device synchronisation: Both ADCs offer the high-speed JESD204B serial data interface.
Low power: Both new ADCs offer 20% lower power consumption than competitive ADCs.
Features of the LMH6401 DVGA include:
Widest bandwidth with support for DC coupling: 4.5 GHz with programmable gain of -6 dB to 26 dB and DC coupling enables signal acquisition of low and high frequencies. This allows for the full verification and analysis of signals in test and measurement applications.
High linearity: OIP3 of 43 dBm at 200 MHz and -63/-63 dBc second- and third-order harmonic distortion at 1 GHz (2Vpp).
Large gain range: 32 dB of gain range and 1 dB step control optimise dynamic range of the signal chain.
Lowest power consumption: Uses 355 mW at 5V—more than 40% less power than the competition.
High density: 3 x 3-mm package is more than 40% smaller than competitive amplifiers.
A complete support suite is available for system designers, including product evaluation modules (EVMs) (ADS54J60EVM, ADS54J54EVM, LMH6401EVM) and a data converter capture card and pattern generator (TSW14J56EVM). IBIS models are available for the ADCs and the amplifier, and a TINA-TI model is available for the amplifier.
The ADS54J54 is $500 (1000); the ADS54J60 will be available in 4Q15 for $705 (1000) and the LMH6401 will be available in June 2015 for $10.95 (also 1000).
TI; Dual-channel 16-bit 1-GSPS ADS54J60 ADC/ Four-channel 14-bit 500-MSPS ADS54J54 ADC/ 4.5-GHz LMH6401 DVGA.
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