LTC2686

RECOMMENDED FOR NEW DESIGNS

8-Channel, 12-/16-Bit Voltage Output SoftSpan DAC

Data Sheet (Rev. A) Product Selection Table

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Part Details

Eight independent SoftSpan DAC channels
Independently programmable output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, ±15 V
Full 12-/16-bit resolution at all ranges
Flexible single- or dual-supply operation
Maximum INL error: ±3 LSB (LTC2686-16), ±0.75 LSB (LTC2686-12)
Precision 4.096 V reference, ±10 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 ±55 mA guaranteed
6 mm × 6 mm, 40-lead LFCSP
4.5 mm × 4.5 mm, 64-ball WLCSP

Documentation

Data Sheet 1

8-Channel, 12-/16-Bit Voltage Output SoftSpan DAC (Rev.A) 08/08/2023

User Guide 1

UG-2018: Evaluating the LTC2686 8-Channel, 16-Bit Voltage Output SoftSpan DAC (Rev.0) 12/01/2021

This is the most up-to-date revision of the Data Sheet.

Software Resources

Mbed Support 1

LTC268x Console Application

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Tools & Simulations

IBIS Model 1

LTC2686 - IBIS Model

Evaluation Kits

Evaluating the LTC2686 8-Channel, 16-Bit Voltage Output SoftSpan DAC

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Features and Benefits

Fully featured evaluation board for the LTC2686 multichannel voltage output DAC
Flexible output power supply configuration
Easy connection to external loads
Test points to monitor DAC status signals
ACE evaluation software compatible

Product Details

The DC2904A-B is a fully featured evaluation board that is used to evaluate the LTC2686, an 8-channel, precision voltage output digital-to-analog converter (DAC).

The DC2904A-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 DC2904A-B.

The DC2904A-B uses Analysis, Control, Evaluation (ACE) software to provide an intuitive graphical user interface (GUI) that configures and controls the LTC2686 using the SPI interface.

The LTC2686 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 DC2904A-B MUX pin, allowing either the channel voltage or current to be externally monitored.

For full specifications on the LTC2686, see the LTC2686 data sheet, which must be consulted in conjunction with the user guide when using the DC2904A-B.

Resources

DC2904A - Design Files
12/1/2021

UG-2018: Evaluating the LTC2686 8-Channel, 16-Bit Voltage Output SoftSpan DAC (Rev.0)
12/1/2021

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