LTC1668

U U FEATURES s 50Msps Update Rate s Pin Compatible 12-Bit, 14-Bit and 16-Bit Devices s High Spectral Purity: 87dB SFDR at 1MHz fOUT s 5pV-s Glitch Impulse s Differential Current Outputs s 20ns Settling Time s Low Power: 180mW from ±5V Supplies s TTL/CMOS (3.3V or 5V) Inputs s Small Package: 28-Pin SSOP U APPLICATIO S s Cellular Base Stations s Multicarrier Base Stations s Wireless Communication s Direct Digital Synthesis (DDS) s xDSL Modems s Arbitrary Waveform Generation s Automated Test Equipment s Instrumentation LTC1666/LTC1667/LTC1668 12-Bit, 14-Bit, 16-Bit, 50Msps DACs DESCRIPTIO The LTC®1666/LTC1667/LTC1668 are 12-/14-/16-bit, 50Msps differential current output DACs implemented on a high performance BiCMOS process with laser trimmed, thin-film resistors. The combination of a novel currentsteering architecture and a high performance process produces DACs with exceptional AC and DC performance. The LTC1668 is the first 16-bit DAC in the marketplace to exhibit an SFDR (spurious free dynamic range) of 87dB for an output signal frequency of 1MHz. Operating from ±5V supplies, the LTC1666/LTC1667/ LTC1668 can be configured to provide full-scale output currents up to 10mA. The differential current outputs of the DACs allow single-ended or true differential operation. The –1V to 1V output compliance of the LTC1666/ LTC1667/LTC1668 allows the outputs to be connected directly to external resistors to produce a differential output voltage without degrading the converter’s linear...