Analog Devices Inc. LTC2688 12-/16-Bit Voltage Output DACs

Analog Devices Inc. LTC2688 12- or 16-Bit Voltage Output Digital to Analog Converters (DACs) are 16-channel, 12- or 16-bit, ±15V components 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 20mA. These SoftSpan™ DACs offer five output ranges up to ±15V. The range of each channel is independently programmable.

The internal 4.096V precision reference sets the accuracy of the output voltage. An external reference can be used for an additional range of options. Three toggle pins support Input Register A and Input Register B toggle or sinusoidal dither at multiple frequencies. An analog multiplexer simplifies the measurement of pin voltages, load currents, and junction temperature.

Programmable offset and gain registers of the Analog Devices LTC2688 improve the accuracy of the DACs outputs. The serial peripheral interface (SPI) and MICROWIRE™-compatible, 3-wire serial interface operate on logic levels as low as 1.71V and clock rates up to 50MHz.

The Analog Devices Inc. LTC2688 12-/16-Bit DACs are available in a 6mm x 6mm LFCSP-40 or a 4.5mm x 4.5mm 64-ball WLCSP package.


  • 16x independent SoftSpan DAC channels
  • 0V to 5V, 0V to 10V, ±5V, ±10V, and ±15V independently programmable output ranges
  • Full 12-/16-bit resolution at all ranges
  • Flexible single- or dual-supply operation
  • ±0.75 (12-bit) or ±3LSB (16-bit) maximum INL error options
  • Precision 4.096V reference, ±5ppm/°C maximum
  • A/B toggle or sinusoidal dither using up to 3x toggle pins
  • Multiplexer for output voltage and load current sense
  • Outputs drive ±20mA guaranteed
  • Package options
    • 6mm x 6mm, 40-lead LFCSP
    • 4.5mm x 4.5mm, 64-ball WLCSP


  • Optical networking
  • Instrumentation
  • Data acquisition
  • Automatic test equipment
  • Process control and industrial automation

Block Diagram

Block Diagram - Analog Devices Inc. LTC2688 12-/16-Bit Voltage Output DACs
Published: 2021-07-28 | Updated: 2023-08-25