LTC1666 Datasheet

• 50Msps Update Rate
• Pin Compatible 12-Bit Devices
• High Spectral Purity: 87dB SFDR at 1MHz f_OUT
• 5pV-s Glitch Impulse
• Differential Current Outputs
• 20ns Settling Time
• Low Power: 180mW from ±5V Supplies
• TTL/CMOS (3.3V or 5V) Inputs
• Small Package: 28-Pin SSOP

• Cellular Base Stations
• Multicarrier Base Stations
• Wireless Communication
• Direct Digital Synthesis (DDS)
• xDSL Modems
• Arbitrary Waveform Generation
• Automated Test Equipment
• Instrumentation

The LTC1666 are 12-bit, 50Msps differential current output DACs implemented on a high performance BiCMOS process with laser trimmed, thin-film resistors. The combination of a novel current-steering architecture and a high performance process produces DACs with exceptional AC and DC performance.

Operating from ±5V supplies, the LTC1666 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 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 are pin compatible and are available in a 28-pin SSOP and are fully specified over the industrial temperature range.