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  2. Analog Functions
  3. Comparators
  4. Comparators with Integrated Reference
  5. MAX9043


Features and Benefits

  • Comparator + Precision Reference in UCSP/SOT23
  • 2.5V to 5.5V Single-Supply Operation (MAX9038–MAX9043)
  • Low Supply Current (MAX9038/MAX9039/MAX9040/MAX9041/MAX9050/MAX9051)
    • 40µA Quiescent
    • 50µA with 100kHz Switching
    • Open-Drain Output MAX9038
  • 400ns Propagation Delay
  • Rail-to-Rail Inputs
  • Rail-to-Rail Output Stage Sinks and Sources 8mA
  • Internal ±3mV Hysteresis
  • Voltage Reference Offers
    • ±0.4% (max) Initial Accuracy (A Grade)
    • 6ppm/°C (typ) Temperature Coefficient (A Grade)
    • Stable for 0 to 4.7nF Capacitive Loads

Product Details

The MAX9038–MAX9043 and MAX9050–MAX9053 feature combinations of low-power comparators and precision voltage references. Their operating voltage range makes them ideal for both 3V and 5V systems. The MAX9038/MAX9039/MAX9040/MAX9041/MAX9050/MAX9051 have a single comparator and reference consuming only 40µA of supply current. The MAX9042/MAX9043/MAX9052/MAX9053 have dual comparators and one reference, and consume only 55µA of supply current. Low-voltage operation and low supply current make these devices ideal for battery-operated systems.

The comparators feature rail-to-rail inputs and outputs, with a common-mode input voltage range that extends 250mV beyond the supply rails. Input bias current is typically 1.0pA, and input offset voltage is typically 0.5mV. Internal hysteresis ensures clean output switching, even with slow-moving input signals. The output stage features a unique design that limits supply current surges while switching, virtually eliminating supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The comparator outputs have rail-to- rail, push-pull output stages except the MAX9038 has an open-drain output that sinks and sources up to 8mA. The propagation delay is 400ns, even with the low-operating supply current.

The reference output voltage is set to 1.23V in the MAX9038/MAX9039, to 2.048V in the MAX9040–MAX9043, and to 2.500V in the MAX9050–MAX9053. The MAX9040–MAX9043 and the MAX9050–MAX9053 are offered in two grades: an A grade with 0.4% initial accuracy and 6ppm/°C tempco, and a B grade with 1% initial accuracy (except MAX9038/MAX9039 have an initial accuracy of ±0.4%) and 100ppm/°C tempco. The voltage references feature a proprietary curvature-correction circuit and laser-trimmed thin-film resistors. These series-mode references can sink or source up to 500µA of load current.


  • Digital-Line Receivers
  • IR Receivers
  • Level Translators
  • Precision Battery Management
  • Window Comparators

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

MAX9043 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX9043AEUB+ Material Declaration Reliability Data 10-MINI_SO-N/A
MAX9043AEUB+T Material Declaration Reliability Data 10-MINI_SO-N/A
MAX9043BEUB+ Material Declaration Reliability Data 10-MINI_SO-N/A
Wafer Fabrication Data

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