Maxim's MAX19692 is a 12-bit, 2,3 Gsps digital-to-analog converter (DAC) that is claimed to set new industry standards among high-speed DACs that can directly synthesize high-frequency and wideband signals in multiple Nyquist zones. The MAX19692 device directly synthesizes signals with up to 1 GHz bandwidth in the frequency range from DC to more than 2 GHz. The part offers superior dynamic performance, including 68 dBc spurious-free dynamic range (SFDR) at an output frequency of 1200 MHz (operating in third Nyquist). This performance is said to be 14 dB better in SFDR than the current industry standard operating at this high-output frequency. Operating from 3,3 V and 1,8 V supplies, the MAX19692 is a current-steering DAC with 4:1 multiplexed LVDS inputs and a 12-bit converter core. The frequency response of the DAC can be configured to optimise signal synthesis in each of the first three Nyquist zones. As a result, it has higher SNR in second and third Nyquist and improved gain flatness compared to that of conventional DAC architectures, which are optimised for the 1st Nyquist zone, according to Maxim.
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