High-Precision, Low-Dropout SOT23 Series Voltage Reference

Industry's Most Accurate SOT23 Voltage Reference

Please check latest availability status for a specific part variant.


The MAX6033 ultra-high-precision series voltage reference features a low 7ppm/°C (max) temperature coefficient and a low dropout voltage (200mV, max). Low temperature drift and low noise make the MAX6033 ideal for use with high-resolution ADCs or DACs.

This device uses bandgap technology for low-noise performance and excellent accuracy. Laser-trimmed, high-stability, thin-film resistors, and postpackage trimming guarantee excellent initial accuracy (±0.04%, max). The MAX6033 consumes only 40µA of supply current and sources up to 15mA. Series mode references save system power and use minimal external components compared to two-terminal shunt references.

The MAX6033 is available in the miniature 6-pin SOT23 package and is offered over the automotive temperature range (-40°C to +125°C).
MAX6033: Typical Operating Circuit MAX6033: Typical Operating Circuit Enlarge+

Key Features

  • Stable Performance Over Temperature and Time Improves Accuracy
    • Ultra-Low Temperature Drift: 7ppm/°C (max)
    • ±0.04% Initial Accuracy
    • Stable with Capacitive Loads up to 100µF
    • Low 16µVP-P Noise (0.1Hz to 10Hz) (2.5V Output)
    • Low 200mV Dropout Voltage
    • Excellent Load Regulation: 0.001mV/mA
  • Low 40µA Quiescent Current Reduces System Power Consumption
  • 2.7V to 12.6V Supply Voltage Eases Power Requirements


  • A/D and D/A Converters
  • Handheld Instruments (PDAs, Palmtops)
  • Hard Disk Drive
  • High-Accuracy Industrial and Process Control
  • Power Supplies
  • Precision Regulators
Part NumberVOUT
Temp. Coeff.
Initial Accuracy
(% max)
Noise 0.1Hz to 10Hz
Oper. Temp.
max@ +25°CmaxminmaxtypSee Notes
70.04602.712.616-40 to +125
MAX6033B 100.2
$3.13 @1k
MAX6033C 200.1
$2.39 @1k
See All Voltage References (170)
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.

Technical Documents

Tutorial 4671 Improve Sensor Performance and SNR in Pulse Oximeter Designs
App Note 4490 How Signal Chains and PLCs Impact Our Lives
App Note 4474 4.096V, 80mA Precision Reference
Tutorial 719 Understanding Voltage-Reference Topologies and Specifications

Quality and Environmental Data

Product Reliability Reports: MAX6033.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX6033
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.

Quality Management System >
Environmental Management System >


Related Resources

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

  • 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