Dual 36V Op Amp for 18-Bit SAR ADC Front-End

Fast-Settling High-Voltage Op Amp is Ideal for an ADC Buffer

Please check latest availability status for a specific part variant.


The MAX9633 is a low-noise, low-distortion operational amplifier that is optimized to drive ADCs for use in applications from DC to a few MHz. The MAX9633 features low noise (3nV/ at 1kHz and 3.5nV/ at 100Hz) and low distortion (130dB at 10kHz), making it suitable for industrial, medical, and test applications.

The exceptionally fast settling-time and low input offset voltage makes the IC an excellent solution to drive high-resolution 12-bit to 18-bit SAR ADCs.

The IC operates from a wide supply voltage range up to 36V with only 3.5mA of quiescent current per amplifier.

The IC is offered in an 8-pin, 3mm x 3mm TDFN package for operation over the -40°C to +125°C temperature range.
MAX9633: Typical Application Circuit MAX9633: Typical Application Circuit Enlarge+

Key Features

  • High-Resolution ADC Driver
    • 27MHz Gain Bandwidth
    • 750ns Settling Time to 16-Bit Accuracy
    • THD of 130dB at 10kHz
    • Low Input Voltage Offset 200µV (max)
    • 3nV/√Hz Ultra-Low Input Voltage Noise
    • Low Input Offset Temperature Drift 0.9µV/°C (max)
    • Unity Gain Stable
  • Support a Wide Range of Industrial Applications
    • 4.5V to 36V Wide Supply Range
  • Improved Reliability
    • ±5kV ESD Protection HBM
  • Saves Board Space
    • 8-Pin TDFN and SO Packages


  • ADC Drivers
  • Data Acquisition and Instrumentation
  • High-Performance Audio Circuitry
  • Imaging Systems
  • Motor Control
  • Power Grid Systems
  • Test and Measurement Equipments

Tools & Models

  • MAX9633 Orcad Library
  • Request Reliability Report for: MAX9633 
    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.

    Quality Management System >
    Environmental Management System >


    Related Resources

    High-Speed Quad Driver with Integrated DACs, Cable-Droop Compensation, Slew-Rate Control, and VHH Fourth-Level Drive

  • Low Power at High-Speed Maximizes Driver Performance
    • 700mW per Channel
    • 2.57Gbps at +1V Programmed
    • 280ps Typical Rise/Fall Times at +2V (20% to 80%)
  • Integrated Functionality Provides Value-Added Features
    • Programmable Double Time Constant Cable-Droop Compensation
    • Digital Slew-Rate Control for EMI Sensitive Applications
    • Adjustable Output Resistance with 360mΩ Resolution

  • MAX40662
    Quad Transimpedance Amplifier with Input Current Clamp and Multiplexer for LiDAR

    • AEC-Q100
    • Enables ASIL Compliance (FMEDA Available Upon Request)
    • Internal Multiplexer

    Dual 280ps High-Speed Comparator, Ultra-Low Dispersion with LVDS Outputs

    • Fast Propagation Delay: 280ps, Typ
    • Low Overdrive Dispersion: 25ps (VOD = 10mV to 1V)
    • Supply Voltage 2.7V to 3.6V