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Description

General part information

LTC1668 Series

The LTC1666/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 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 compatible and are available in a 28-pin SSOP and are fully specified over the industrial temperature range.ApplicationsCellular Base StationsMulticarrier Base StationsWireless CommunicationDirect Digital Synthesis (DDS)xDSL ModemsArbitrary Waveform GenerationAutomated Test EquipmentInstrumentation

Technical Specifications

Parameters and characteristics for this part

SpecificationLTC1668CG#PBF
ArchitectureCurrent Steering
Data InterfaceParallel
Differential OutputYes
DNL (LSB) Tolerance1 LSB
DNL (Max) (LSB)1 LSB
INL (Max) (LSB)8 LSB
Mounting TypeSurface Mount
Number of Bits16 bits
Number of D/A Converters1 count
Operating Temperature (Max)70 °C
Operating Temperature (Min)0 °C
Output TypeCurrent - Unbuffered
Package Length0.209 in
Package Name28-SSOP
Package Width5.3 mm
Reference TypeExternal, Internal
Settling Time (Typical)20 ns
Voltage - Supply, Analog (Max)5 V
Voltage - Supply, Analog (Min)-5 V

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