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

Product Details

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.

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

Applications/Uses

  • 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
Parametric specs for Integrated Amplifiers + Comparator + Reference
Internal Reference (1.2V ±2%) Yes
ICC per Comp. (µA) (max) 550
VCMVR (V) -0.15 to VCC-1.2
Op. Amp. GBW (kHz) (typ) 1250
AVCL (min) 1
Op. Amp. VOS (mV) (max) 1.5
Op. Amp. IBIAS (pA) (max) 2000
Op. Amp. VNOISE (nV/√Hz) 36 @ 10kHz
Comparator tPD (µs) 0.185
Comparator VOUT @Load (V) (typ) 0.005 to VCC-0.005 @ 100µA
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
$2.87 @1k
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Simplified Block Diagram

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

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Parameters

Parametric specs for Integrated Amplifiers + Comparator + Reference
Internal Reference (1.2V ±2%) Yes
ICC per Comp. (µA) (max) 550
VCMVR (V) -0.15 to VCC-1.2
Op. Amp. GBW (kHz) (typ) 1250
AVCL (min) 1
Op. Amp. VOS (mV) (max) 1.5
Op. Amp. IBIAS (pA) (max) 2000
Op. Amp. VNOISE (nV/√Hz) 36 @ 10kHz
Comparator tPD (µs) 0.185
Comparator VOUT @Load (V) (typ) 0.005 to VCC-0.005 @ 100µA
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
$2.87 @1k

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

Applications/Uses

  • 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

Description

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.

Simplified Block Diagram

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

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal