LTC1668CG#PBF

LTC1668 is a 50Msps differential current output DAC 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 DAC with exceptional AC and DC performance. This 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. The –1V to 1V output compliance of this 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. Typical applications are cellular base stations, multicarrier base stations, wireless communication, direct digital synthesis (DDS), xDSL modems, arbitrary waveform generation, automated test equipment, instrumentation.

• High spectral purity: 87dB SFDR at 1MHz fOUT
• 5pV-s glitch impulse, differential current outputs
• Resolution is 16bit (TA=25°C. VDD=5V, VSS=–5V, LADCOM=AGND=DGND=0V, IOUTFS=10mA)
• Integral nonlinearity is ±8LSB
• Differential nonlinearity is ±4LSB
• Offset error drift is 5ppm/°C
• Power supply rejection ratio is ±0.1% FSR/V (VDD=5V ±5%)
• 28-lead plastic SSOP package
• Operating temperature rating range from 0°C to 70°C

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