Single/Dual/Quad Ultra-Low Input Bias Current, Low Noise Amplifiers

Combination of Low Input Bias Current, Very Low Noise and Tiny Size Makes These Amps Great for Precision Applications

Please check latest availability status for a specific part variant.


The MAX40079/MAX40087/MAX40077/MAX40089/MAX40078 are wide band, low-noise, low-input bias current operational amplifiers that offer rail-to-rail outputs and single-supply operation from 2.7V to 5.5V. These low-noise amps draw 2.2mA of quiescent supply current per amplifier. This family of amplifiers offers ultra-low distortion (0.0002% THD+N), as well as low input voltage-noise density (4.2nV/√Hz) and low input current-noise density (0.5fA/√Hz). The low input bias current of 50fA (typ) and low noise (4.5nV/√Hz), together with the wide bandwidth, provides excellent performance for trans-impedance (TIA) and imaging applications.

These amplifiers have outputs which swing rail-to-rail and their input common-mode voltage range includes ground. The MAX40079/MAX40077/MAX40078 are single/dual/quad respectively in unity-gain stable with a bandwidth of 10MHz. The MAX40087/MAX40089 are single/dual respectively with gain ≥ 5 stable and bandwidth of 42MHz. They operate over the full -40°C to +125°C temperature range.

Single channel op amps are available in 6-bump wafer-level package (WLP) and SOT23 6-pin packages. The dual channel op amps are available in 8-bump WLP and µMAX-8 packages. The quad channel option is available in 14-TSSOP package.
MAX40077, MAX40078, MAX40079, MAX40087, MAX40089: Functional Diagram MAX40077, MAX40078, MAX40079, MAX40087, MAX40089: Functional Diagram Enlarge+

Key Features

  • Low Input Voltage Noise Density: 4.2nV/ at 30KHz
  • Low Input Current Noise Density: 0.5fA/
  • Low Input Bias Current: 0.3pA (typ)
  • Low Distortion: 0.00035% or -109dB THD+N (1kΩ Load)
  • Single-Supply Operation from +2.7V to +5.5V
  • Input Common-Mode Voltage Range Includes Ground
  • Rail-to-Rail Output Swings with a 1kΩLoad
  • Wide Bandwidth: MAX 40079/MAX40077/MAX40078 (10MHz); MAX40087/MAX40089 (42MHz)
  • Excellent DC Characteristics: VOS ≤ 70µV
  • Single-Channel 6-bump WLP in 1.11mm x 0.76mm with 0.35mm Bump Pitch
  • Dual-Channel 8-bump WLP in 0.96mm x 1.66mm with 0.35mm Bump Pitch
  • Available in Space-Saving 6-WLP, 6-SOT, 8-WLP, and µMAX Packages


  • ADC Buffers
  • DAC Output Amplifiers
  • Digital Scales
  • Low-Noise Microphone/Preamplifiers
  • Medical Instrumentation
  • pH Probes and Reference Electrodes
  • Strain Gauges/Sensor Amplifiers
  • Transimpedance Amplifiers
Part NumberAmps.Rail to RailAV
ICC per Amp.
Low Input Bias CMOS InputsInput IBIAS
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX40077 2Output Only-2.75.52200150109107-2.3103-
See Data Sheet
MAX40078 41250070120120--1035.5
See Data Sheet
MAX40079 1-2200150109107Yes0.16103-
$1.15 @1k
MAX40087 1-2200150109107-0.164210-
$1.15 @1k
MAX40089 2-2200150109107-0.164210-
See Data Sheet
See All Operational Amplifiers (173)
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.

Quality and Environmental Data

Request Reliability Report for: MAX40079 
Lead-Free Package Tin (Sn) Whisker Reports
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