LTC2688 Digital-to-Analog Converter (DAC)

ADI's LTC2688 is a 16-channel, 16-bit, ±15 V, small form factor DAC with an integrated precision reference converter. This product is ideal for automatic test equipment, DAC-per-pin programmers, data acquisition systems, and closed-loop servo-control.

The DC2873A-B is a fully featured evaluation board that is used to evaluate the LTC2688, a 16-channel, precision voltage output DAC. The DC2873A-B is controlled through a serial peripheral interface (SPI) from the J1 connector. The SPI signals are sent from the DC2026C controller board through the ribbon cable that is connected to the DC2873A-B.

The DC2873A-B uses analysis, control, evaluation (ACE) software to provide an intuitive graphical user interface (GUI) that configures and controls the LTC2688 using the SPI.

The LTC2688 is used for various voltage mode biasing applications such as optical modulators for data communications. The output voltage range for each channel is software selectable and any channel can be routed to the DC2873A-B MUX pin, allowing either the channel voltage or current to be externally monitored.

Features and Benefits

• A/B toggle with sinusoidal dither targets the specific requirements of Mach-Zehnder modulator (MZM) technologies and biasing topologies
• Highly compact 16-channel software programmable bipolar voltage DAC improves overall system flexibility
• Monitor mux that allows the user to sense DAC voltages and DAC output currents to reduce calibration time and system complexity