Single/dual, 14-bit 250-Msps ADCs offer high SFDR undersampling performance
The ADCs are specifically designed to meet the needs of today’s communications systems, where high undersampling capability reduces costs by eliminating down conversion stages.
Operating from a single 1.8 V supply, the dual LTC2157-14 consumes 303 mW per channel at 250 Msps and offers signal to noise ratio (SNR) performance of 70 dB and SFDR of 90 dB at baseband with an easy-to-drive 1.5 Vp-p input range. Pin-compatible speed grade options include 170 Msps and 210 Msps in 14-bit and 12-bit resolutions. Analog full power bandwidth of 1.25 GHz and ultralow jitter of 0.15 psRMS enables undersampling of IF frequencies with excellent noise performance.
Availability and Pricing
Available in compact 9 mm x 9 mm (dual) and 6 mm x 6 mm (single) QFN packages, the ADCs are offered in commercial or industrial temperature grades. Demonstration boards and samples are immediately available. The 14-bit dual 250 Msps LTC2157-14 is priced at $131.57 each in 1,000-piece quantities.
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