MAX5120

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

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


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Description

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)

Applications/Uses

  • µP-Controlled Systems
  • Automated Test Equipment (ATE)
  • Digital Gain and Offset Control
  • Industrial Process Controls
  • Motion Control

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: MAX5120.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.

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