LTC1666 Datasheet | Linear Technology

Features s 50Msps Update Rate s Pin patible 12-Bit, 14-Bit and 16-Bit Devices s High Spectral Purity: 87d B SFDR at 1MHz f OUT s 5p V-s Glitch Impulse s Differential Current Outputs s 20ns Settling Time s Low Power: 180m W 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 munication s Direct Digital Synthesis (DDS) s x DSL 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 Bi CMOS process with laser trimmed, thin-film resistors. The bination 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 87d B 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 10m A. The differential current outputs of the DACs allow single-ended or true differential operation. The - 1V to 1V output pliance 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 linearity. Alternatively, the outputs can be connected to the summing junction of a high speed operational amplifier, or to a transformer. The LTC1666/LTC1667/LTC1668 are pin patible and are available in a 28-pin SSOP and are fully specified over the industrial temperature range. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION LTC1668, 16-Bit, 50Msps DAC 5V 0.1µF 0.1µF RSET 2k C1 0.1µF C2 0.1µF REFOUT 2.5V REFERENCE IREFIN LTC1668 P1...