Ultra-High-Precision, Ultra-Low-Noise, Series Voltage Reference

Features 5ppm/°C (max) Temperature Coefficients and an Excellent ±0.02% (max) Initial Accuracy

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The MAX6226 is an ultra-low-noise, high-precision, low dropout voltage reference. This family of voltage references feature curvature-correction circuitry and high-stability, laser-trimmed, thin-film resistors that result in 5ppm/°C (max) temperature coefficients and an excellent ±0.02% (max) initial accuracy. The proprietary low-noise reference architecture produces a low flicker noise of 1.45µVP-P and wideband noise as low as 75nV/√Hz (2.5V output) without the increased supply current usually found in low-noise references. Improve wideband noise to 45nV/√Hz and AC power-supply rejection by adding a 0.1µF capacitor at the noise reduction pin. The MAX6226 series mode reference operates from a wide 2.7V to 12.6V supply voltage range and load-regulation specifications are guaranteed to be less than 0.25Ω and 0.05Ω for sink and source currents up to 10mA, respectively. These devices are available over the automotive temperature range of -40°C to +125°C.

The MAX6226 typically draws 380μA of supply current and the output voltage is 2.5V. The MAX6226 also feature dropout voltages as low as 200mV. Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external resistor, the MAX6226 offers supply current that is virtually independent of supply voltage and does not require an external resistor. The MAX6226 is stable with 0.1µF to 10µF of load capacitance, and is available in an 8-pin ceramic package.

MAX6226: Typical Operating Circuit MAX6226: Typical Operating Circuit Enlarge+

Key Features

  • 8-pin Hermetically Sealed Ceramic Package Reduces System Board Space
  • Ultra-Low 1.45µVP-P Noise (0.1Hz to 10Hz, 2.5V Output)
  • Ultra-Low 5ppm/°C (Max) Temperature Coefficient
  • ±0.02% (Max) Initial Accuracy
  • Wide (VOUT + 200mV) to 12.6V Supply Voltage Range
  • Low 200mV (Max) Dropout Voltage
  • 380µA Quiescent Supply Current
  • 10mA Sink/Source-Current Capability
  • Stable with CLOAD = 0.1µF to 10µF
  • Low 11ppm/1000hr Long-Term Drift
  • 0.05Ω (Max) Load Regulation
  • 25µV/V (Max) Line Regulation
  • Force and Sense Outputs for Remote Sensing


  • ATE Equipment
  • Digital Voltmeters
  • High-Accuracy Industrial and Process Control
  • High-Accuracy Reference Standard
  • High-Resolution A/D and D/A Converters
  • Precision Current Sources

See parametric specs for Voltage References (171)

Part NumberVOUT
Temp. Coeff.
Initial Accuracy
(% max)
Calibration MethodISUPPLY
Noise 0.1Hz to 10Hz
Oper. Temp.
max@ +25°CmaxminmaxtypmaxSee Notes
MAX6226 2.550.02Trim7252.712.61.450.725-40 to +125
$5.91 @1k

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.

MAX6226EVKIT: Evaluation Kit for the MAX6226
Request Reliability Report for: MAX6226 
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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