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LTC1667IG Datasheet(PDF) 1 Page - Linear Technology |
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LTC1667IG Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  1 LTC1666/LTC1667/LTC1668 APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATION 12-Bit, 14-Bit, 16-Bit, 50Msps DACs 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 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 current- steering 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 out- put voltage without degrading the converter’s linearity. Al- ternatively, 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 compatible 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. 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 LTC1668, 16-Bit, 50Msps DAC – + VSS VDD –5V CLOCK INPUT 16-BIT DATA INPUT LADCOM AGND DGND CLK DB15 DB0 1666/7/8 TA01 IOUT A 0.1 µF LTC1668 5V 52.3 Ω IREFIN REFOUT COMP1 COMP2 C2 0.1 µF 0.1 µF C1 0.1 µF RSET 2k IOUT B 52.3 Ω VOUT 1VP-P DIFFERENTIAL + – 0.1 µF 16-BIT HIGH SPEED DAC 2.5V REFERENCE LTC1668 SFDR vs fOUT and fCLOCK fOUT (MHz) 0.1 100 90 80 70 60 50 1.0 10 100 1666/7/8 G05 5MSPS 25MSPS 50MSPS DIGITAL AMPLITUDE = 0dBFS |
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