The DAC5672 is a monolithic, dual-channel, 14-bit, high-speed DAC with on-chip voltage reference.
●Operating with update rates of up to 275 MSPS, the DAC5672 offers exceptional dynamic performance, tight-gain, and offset matching characteristics that make it suitable in either I/Q baseband or direct IF communication applications.
●Each DAC has a high-impedance, differential-current output, suitable for single-ended or differential analog-output configurations. External resistors allow scaling the full-scale output current for each DAC separately or together, typically between 2 mA and 20 mA. An accurate on-chip voltage reference is temperature-compensated and delivers a stable 1.2-V reference voltage. Optionally, an external reference may be used.
●The DAC5672 has two, 14-bit, parallel input ports with separate clocks and data latches. For flexibility, the DAC5672 also supports multiplexed data for each DAC on one port when operating in the interleaved mode.
●The DAC5672 has been specifically designed for a differential transformer-coupled output with a 50- doubly-terminated load. For a 20-mA full-scale output current, both a 4:1 impedance ratio (resulting in an output power of 4 dBm) and 1:1 impedance ratio transformer (–2 dBm output power) are supported.
●The DAC5672 is available in a 48-pin TQFP package. Pin compatibility between family members provides 12-bit (DAC5662) and 14-bit (DAC5672) resolution. Furthermore, the DAC5672 is pin compatible to the DAC2904 and AD9767 dual DACs. The device is characterized for operation over the industrial temperature range of 40°C to 85°C.
● 14-Bit Dual Transmit Digital-to-Analog Converter (DAC)
● 275 MSPS Update Rate
● Single Supply: 3 V to 3.6 V
● High Spurious-Free Dynamic Range (SFDR): 84 dBc at 5 MHz
● High Third-Order Two-Tone Intermodulation (IMD3): 79 dBc at 15.1 MHz and 16.1 MHz
● WCDMA Adjacent Channel Leakage Ratio (ACLR): 78 dB at Baseband
● WCDMA ACLR: 73 dB at 30.72 MHz
● Independent or Single Resistor Gain Control
● Dual or Interleaved Data
● On-Chip 1.2-V Reference
● Low Power: 330 mW
● Power-Down Mode: 9 mW
● Package: 48-Pin Thin-Quad Flat Pack (TQFP)
● APPLICATIONS
● Cellular Base Transceiver Station Transmit Channel
● CDMA: W-CDMA, CDMA2000, IS-95
● TDMA: GSM, IS-136, EDGE/UWC-136
● Medical/Test Instrumentation
● Arbitrary Waveform Generators (ARB)
● Direct Digital Synthesis (DDS)
● Cable Modem Termination System (CMTS)
