The DAC5672A device is a monolithic, dual-channel, 14-bit, high-speed DAC with on-chip
Operating with update rates of up to 275 MSPS, the DAC5672A offers exceptional dynamic
performance, tight-gain, and offset matching characteristics that make the device well-suited in
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 DAC5672A has two, 14-bit, parallel input ports with separate clocks and data latches.
For flexibility, the DAC5672A supports multiplexed data for each DAC on one port when operating in
the interleaved mode.
The DAC5672A is specifically designed for a differential transformer-coupled output with
a 50-Ω doubly-terminated load. For a 20-mA full-scale output current, a 4:1 impedance ratio
(resulting in an output power of 4 dBm) and 1:1 impedance ratio transformer (–2 dBm output power)
The DAC5672A is available in a 48-pin TQFP package. Pin compatibility between family
members provides 12-bit (DAC5662) and 14-bit (DAC5672A) resolutions. Furthermore, the DAC5672A 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.
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