Dual, 10-Bit, Programmable, 30mA High-Output-Current DAC

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The MAX5550 dual, 10-bit, digital-to-analog converter (DAC) features high-output-current capability. The MAX5550 sources up to 30mA per DAC, making it ideal for PIN diode biasing applications. Outputs can also be paralleled for high-current applications (up to 60mA typ). Operating from a single +2.7V to +5.25V supply, the MAX5550 typically consumes 1.5mA per DAC in normal operation and less than 1µA (max) in shutdown mode. The MAX5550 also features low output leakage current in shutdown mode (±1µA max) that is essential to ensure that the external PIN diodes are off.

Additional features include an integrated +1.25V bandgap reference, and a control amplifier to ensure high accuracy and low-noise performance. A separate reference input (REFIN) allows for the use of an external reference source, such as the MAX6126, for improved gain accuracy. A pin-selectable I²C-/SPI™-compatible serial interface provides optimum flexibility for the MAX5550. The maximum programmable output current value is set using software and an adjustment resistor. The MAX5550 is available in a (3mm × 3mm) 16-pin thin QFN package, and is specified over the extended (-40°C to +85°C) temperature range.
MAX5550: Functional Block Diagram MAX5550: Functional Block Diagram Enlarge+

Key Features

  • Pin-Selectable I²C- or SPI-Compatible Interface
  • Guaranteed Low Output Leakage Current in Shutdown (±1µA max)
  • Guaranteed Monotonic over Extended Temperature Range
  • Dual Outputs for Balanced Systems
  • Current Outputs Source Up to 30mA per DAC
  • Parallelable Outputs for 60mA Applications
  • Output Stable with RF Filters
  • Internal or External Reference Capability
  • Digital Output (DOUT) Available for Daisy Chaining in SPI Mode
  • +2.7V to +5.25V Single-Supply Operation
  • 16-Pin (3mm x 3mm) Thin QFN Package
  • Programmable Output Current Range Set by Software and Adjustment Resistor


  • PIN Diode Biasing
  • RF Attenuator Control
  • VCO Tuning
Part NumberResolution
ChannelsOutput TypeReferenceINL
InterfaceSupply Range
Supply Range
Settling Time
Package/PinsOper. Temp.
maxminmaxmaxtypSee Notes
MAX5550 102Current- BufferedInt.1
Serial - I2C
Serial - SPI
-40 to +85$3.69 @1k
See All Precision DACs (249)
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.

MAX5550EVKIT: Evaluation Kit for the MAX5550 and MAX5548
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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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