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Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference

Product Details

Key Features

Applications/Uses

Parametric specs for Integrated Amplifiers + Comparator + Reference
Internal Reference (1.2V ±2%) No
ICC per Comp. (µA) (max) 8
VCMVR (V) 0 to VCC-1.6
Op. Amp. GBW (kHz) (typ) 20
AVCL (min) 1
Op. Amp. VOS (mV) (max) 3
Op. Amp. IBIAS (pA) (max) 50
Op. Amp. VNOISE (nV/√Hz) 80 @ 1kHz
Comparator tPD (µs) 4
Comparator VOUT @Load (V) (typ) 0.4 to VCC-0.4 @ 100k
VSUPPLY (V) (min) 2.4
VSUPPLY (V) (max) 7
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
$3.02 @1k
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Simplified Block Diagram

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Parameters

Parametric specs for Integrated Amplifiers + Comparator + Reference
Internal Reference (1.2V ±2%) No
ICC per Comp. (µA) (max) 8
VCMVR (V) 0 to VCC-1.6
Op. Amp. GBW (kHz) (typ) 20
AVCL (min) 1
Op. Amp. VOS (mV) (max) 3
Op. Amp. IBIAS (pA) (max) 50
Op. Amp. VNOISE (nV/√Hz) 80 @ 1kHz
Comparator tPD (µs) 4
Comparator VOUT @Load (V) (typ) 0.4 to VCC-0.4 @ 100k
VSUPPLY (V) (min) 2.4
VSUPPLY (V) (max) 7
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
$3.02 @1k

Key Features

  • Op Amp + Comparator + Reference in an 8-Pin µMAX® Package (MAX951/MAX952)
  • 7µA Typical Supply Current (Op Amp + Comparator + Reference)
  • Comparator and Op Amp Input Range Includes Ground
  • Outputs Swing Rail-to-Rail
  • 2.4V to 7V Supply Voltage Range
  • Unity-Gain Stable and 125kHz Decompensated AV > 10V/V Op Amp Options
  • Internal 1.2V ±2% Bandgap Reference
  • Internal Comparator Hysteresis
  • Op Amp Capable of Driving up to 1000pF Load

Applications/Uses

  • Battery-Powered Applications
  • Infrared Receivers for Remote Controls
  • Instruments, Terminals, and Bar-Code Readers
  • Low-Frequency, Local-Area Alarms/Detectors
  • Photodiode Preamps
  • Smart Cards
  • Smoke Detectors and Safety Sensors

Description

The MAX951–MAX954 feature combinations of a micropower operational amplifier, comparator, and reference in an 8-pin package. In the MAX951 and MAX952, the comparator's inverting input is connected to an internal 1.2V ±2% bandgap reference. The MAX953 and MAX954 are offered without an internal reference. The MAX951/MAX952 operate from a single 2.7V to 7V supply with a typical supply current of 7µA, while the MAX953/MAX954 operate from 2.4V to 7V with a 5µA typical supply current. Both the op amp and comparator feature a common-mode input voltage range that extends from the negative supply rail to within 1.6V of the positive rail, as well as output stages that swing rail-to-rail.

The op amps in the MAX951/MAX953 are internally compensated to be unity-gain stable, while the op amps in the MAX952/MAX954 feature 125kHz typical bandwidth, 66V/ms slew rate, and stability for gains of 10V/V or greater. These op amps have a unique output stage that enables them to operate with an ultra-low supply current while maintaining linearity under loaded conditions. In addition, they have been designed to exhibit good DC characteristics over their entire operating temperature range, minimizing input-referred errors.

The comparator output stage of these devices continuously sources as much as 40mA. The comparators eliminate power-supply glitches that commonly occur when changing logic states, minimizing parasitic feedback and making the devices easier to use. In addition, they contain ±3mV internal hysteresis to ensure clean output switching, even with slow-moving input signals.

Simplified Block Diagram

MAX951, MAX952, MAX953, MAX954: Typical Operating Circuit MAX951, MAX952, MAX953, MAX954: Typical Operating Circuit 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 .