+3V/+5V, 12-Bit, Serial, Voltage-Output DACs with Internal Reference

Industry's First 10ppm/°C Internal Reference 12-Bit DACs

Please check latest availability status for a specific part variant.


The MAX5120/MAX5121 are low-power, 12-bit, voltage-output digital-to-analog converters (DACs) with an internal precision bandgap reference and an output amplifier. The MAX5120 operates on a +5V supply with an internal amplifier reference of +2.5V and is capable of a +4.095V full-scale output range. The MAX5121, operating on +3V, delivers its +2.0475V full-scale output with an internal precision reference of +1.25V. If necessary, the user can override the internal, < 10ppm/°C voltage reference with an external reference. Both devices draw only 500µA of supply current, which reduces to 3µA in power-down mode. In addition, their power-up reset feature allows for a user-selectable initial output state of either 0V or midscale and minimizes output voltage glitches during power-up.

The serial interface is compatible with SPI™, QSPI™ and MICROWIRE™, which makes the MAX5120/MAX5121 suitable for cascading multiple devices. Each DAC has a double-buffered input organized as an input register followed by a DAC register. A 16-bit shift register loads data into the input register. The DAC register may be updated independently or simultaneously with the input register.

Both devices are available in a 16-pin QSOP package and are specified for the extended industrial (-40°C to +85°C) temperature range. For pin-compatible 14-bit upgrades, see the MAX5170/MAX5172 data sheet; for pin-compatible 13-bit versions, see the MAX5130/MAX5131 data sheet.
MAX5120, MAX5121: Functional Block Diagram MAX5120, MAX5121: Functional Block Diagram Enlarge+

Key Features

  • Single-Supply Operation
    • +5V (MAX5120)
    • +3V (MAX5121)
  • Full-Scale Output Range
    • +4.095V (MAX5120)
    • +2.0475V (MAX5121)
  • Built-In 10ppm/°C (max) Precision Bandgap Reference
    • +2.5V (MAX5120)
    • +1.25V (MAX5121)
  • Adjustable Output Offset
  • SPI/QSPI/Microwire-Compatible, 3-Wire Serial Interface
  • Pin-Programmable Shutdown Mode and Power-Up Reset (0V or Midscale Output Voltage)
  • Buffered Output Capable of Driving 5kΩ ||100pF or 4-20mA Loads
  • Space-Saving 16-Pin QSOP Package
  • Pin-Compatible 13-Bit Upgrades Available (MAX5130/MAX5131)
  • Pin-Compatible 14-Bit Upgrades Available (MAX5170/MAX5172)


  • µP-Controlled Systems
  • Automated Test Equipment (ATE)
  • Digital Gain and Offset Control
  • Industrial Process Controls
  • Motion Control
Product Reliability Reports: MAX5121.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources