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TI Rolls Out ADS5474 14-Bit ADC
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Driven by TI’s BiCom3 process technology, ADS5474 integrates an on-chip buffer amplifier to ease analogue front-end (AFE) design.
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Thursday, August 09, 2007:
Texas Instruments Incorporated has rolled out ADS5474, what it calls is the industry’s fastest monolithic 14-bit analogue-to-digital converter (ADC) at 400 mega samples per second (MSPS). The new ADC provides performance of 11.1 effective number of bits (ENOB) at this speed, enabling high-bandwidth applications such as software-defined radio, radar systems and communication instrumentation that were previously confined to lesser resolution ADCs.
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The buffer amplifier eliminates sample-and-hold kick-back and provides a high-input impedance over time and frequency, simplifying the AFE design for wide bandwidth applications from DC to intermediate frequencies (IF) well above 200 MHz. Additionally, ADS5474 is pin-for-pin compatible to the ADS5463 12-bit, 500-MSPS ADC, in a 14mm x 14mm package.
The 400-MSPS sample rate provided by ADS5474 with 70-dBFS signal-to-noise ratio through first Nyquist and 69-dBFS SNR through second Nyquist improves transmit power amplifier linearisation and efficiency when used in conjunction with a digital pre-distortion algorithm, lowering total system cost; enables sampling of larger bandwidths in radar systems; allows software-defined radios to implement a greater number of standards with higher sensitivity; and also enables 14-bit resolution with 200-MHz bandwidth for high-speed digitisers, spectrum analysers, test and measurement equipment and general data acquisition system.
ADS5474 is available now in an 80-pin TQFP PowerPAD package and is priced at $150.00 each in 1,000-piece quantities.
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