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MAX9000, MAX9001, MAX9002, MAX9003, MAX9004, MAX9005

Low-Power, High-Speed, Single-Supply Op Amp Comparator Reference ICs

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Active: In Production.


The MAX9000 family features the combination of a high-speed operational amplifier, a 185ns comparator, and a precision 1.230V reference. These devices operate from a single +2.5V to +5.5V supply and draw less than 500µA of quiescent current. The MAX9001/MAX9004 feature a shutdown mode that reduces supply current to 2µA and puts the outputs into a high-impedance state, making them ideal for portable and battery-powered applications.

The amplifiers in the MAX9000/MAX9001/MAX9002 are unity-gain stable with a 1.25MHz gain-bandwidth product, while the amplifiers in the MAX9003/MAX9004/MAX9005 are stable for closed-loop gains of +10V/V or greater with an 8MHz gain-bandwidth product. The input common-mode voltage extends from 150mV below the negative supply to within 1.2V of the positive supply for the amplifier, and to within 1.1V for the comparator. The amplifier and comparator outputs can swing rail-to-rail and deliver up to ±2.5mA and ±4.0mA, respectively, to an external load while maintaining excellent DC accuracy. The unique design of the comparator output stage substantially reduces switching current during output transitions, virtually eliminating power-supply glitches.

The comparator's ±2mV of built-in hysteresis provides noise immunity and prevents oscillations even with a slow-moving input signal. The MAX9000/MAX9001/MAX9003/MAX9004 have an internal 1.230V ±1% precision reference with a low 8ppm/°C temperature coefficient that can sink or source up to 1mA. The amplifier and reference are stable with capacitive loads up to 250pF and 100nF, respectively. The comparator's inverting input is internally connected to the reference output in the MAX9000/MAX9003.

Data Sheet

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Key Features

  • Op Amp + Comparator + Reference in Space-Saving µMAX® Package
  • +2.5V to +5.5V Single-Supply Voltage Range
  • 340µA Supply Current (MAX9002/MAX9005)
  • Unity-Gain Stable (GBW = 1.25MHz) and Decompensated (AV > 10V/V, GBW = 8MHz) Options
  • Op-Amp/Comparator Outputs Swing Rail-to-Rail
  • Ground-Sensing Inputs for Both Op Amp and Comparator
  • Op Amp Stable with Capacitive Loads up to 250pF
  • Internal ±2mV Comparator Hysteresis
  • Fast 185ns Propagation-Delay Comparator
  • No Phase Reversal for Overdriven Inputs (Both Op Amp and Comparator)
  • Internal 1.230V Precision Reference (MAX9000/MAX9001/MAX9003/MAX9004)
    • ±1% Initial Accuracy
    • Low 8ppm/°C Temperature Drift
    • Sink or Source up to 1mA
    • Stable for Capacitive Loads up to 100nF


  • Infrared Receivers for Remote Controls
  • Instruments, Terminals, and Bar-Code Readers
  • Keyless Entry
  • Photodiode Preamps
  • Sensor Signal Detection
  • Single-Supply Zero-Crossing Detectors
  • Smart Card Readers

Key Specifications:

Integrated Amplifiers + Comparator + Reference
Part Number Internal Ref. ICC per Comp.
Op. Amp. GBW
Op. Amp. IBIAS
Comp. tPD
Comp. VOUT @Load
Oper. Temp.
1.2V ±2% max typ min max max typ min max See Notes
MAX9000  Yes 550 -0.15 to VCC-1.2 1250 1 1.5 2000 36 @ 10kHz 0.185 0.005 to VCC-0.005 @ 100µA 2.5 5.5 -40 to +85 $2.73 @1k
MAX9001  Yes 550 1250 1 $2.85 @1k
MAX9002  No 475 1250 1 $1.84 @1k
MAX9003  Yes 550 8000 10 $2.63 @1k
MAX9004  Yes 550 8000 10 $2.85 @1k
MAX9005  No 475 8000 10 $1.85 @1k
See All Integrated Amplifiers + Comparator + Reference (9)

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.


MAX9000, MAX9001, MAX9002, MAX9003, MAX9004, MAX9005: Functional Diagram
Functional Diagram

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Document Ref.: 19-0499 Rev 1; 1998-07-01
This page last modified: 2009-11-05