Features and Benefits
- 16 independent SoftSpan DACs
- Independently programmable output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, ±15 V
- Full 16-bit resolution at all ranges
- Flexible single- or dual-supply operation
- Maximum INL error: ±3 LSB
- Precision 4.096 V reference, ±5 ppm/°C maximum
- A/B toggle or sinusoidal dither using up to 3 toggle pins
- Multiplexer for output voltage and load current sense
- Outputs drive ±20 mA guaranteed
- 6 mm × 6 mm, 40-lead LFCSP
The LTC2688 is a 16-channel,16-bit, ±15 V digital-to-analog converter (DAC) with an integrated precision reference. The LTC2688 is guaranteed monotonic and has built in rail-to-rail output buffers that can source or sink up to 20 mA. This SoftSpan™ DAC offers five output ranges up to ±15 V. The range of each channel is independently programmable.
The internal 4.096 V precision reference sets the accuracy of the output voltage. An external reference can be used for additional range options. Three toggle pins support Input Register A and Input Register B toggle or sinusoidal dither at multiple frequencies. An analog multiplexer simplifies measurement of pin voltages, load currents, and junction temperature.
Programmable offset and gain registers improve the accuracy of the DAC outputs.
The serial peripheral interface (SPI) and MICROWIRE™-compatible, 3-wire serial interface operates on logic levels as low as 1.71 V and clock rates up to 50 MHz.
- Optical networking
- Data acquisition
- Automatic test equipment
- Process control and industrial automation
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The DC2873A-B is a fully featured evaluation board that is used to evaluate the LTC2688, a 16-channel, precision voltage output digital-to-analog converter (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 interface.
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.
For full specifications on the LTC2688, see the LTC2688 data sheet, which must be consulted in conjunction with the user guide when using the DC2873A-B.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.