LTC1668IG#PBF

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1. DESCRIPTION

The LTC®1666/LTC1667/LTC1668IG#PBF 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 LTC1668IG#PBF 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/ LTC1668IG#PBF 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/LTC1668IG#PBF 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/LTC1668IG#PBF are pin compatible and are available in a 28-pin SSOP and are fully specified over the industrial temperature range.

2. FEATURES

    1. 50Msps Update Rate

    2. Pin Compatible 12-Bit, 14-Bit and 16-Bit Devices

    3. High Spectral Purity: 87dB SFDR at 1MHz fOUT

    4. 5pV-s Glitch Impulse

    5. Differential Current Outputs

    6. 20ns Settling Time

    7. Low Power: 180mW from ±5V Supplies

    8. TTL/CMOS (3.3V or 5V) Inputs

    9. Small Package: 28-Pin SSOP

3. APPLICATIONS

    1. Cellular Base Stations

    2. Multicarrier Base Stations

    3. Wireless Communication

    4. Direct Digital Synthesis (DDS)

    5. xDSL Modems

    6. Arbitrary Waveform Generation

    7. Automated Test Equipment

    8. Instrumentation