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MAX9945
38V, Low-Noise, MOS-Input, Low-Power Op Amp

Great Combination of Low Power and Low Noise in a Small Package


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 324kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail
The MAX9945 operational amplifier features an excellent combination of low operating power and low input voltage noise. In addition, MOS inputs enable the MAX9945 to feature low input bias currents and low input current noise. The device accepts a wide supply voltage range from 4.75V to 38V and draws a low 400µA quiescent current. The MAX9945 is unity-gain stable and is capable of rail-to-rail output voltage swing.

The MAX9945 is ideal for portable medical and industrial applications that require low noise analog front-ends for performance applications such as photodiode transimpedance and chemical sensor interface circuits.

The MAX9945 is available in both an 8-pin µMAX® and a space-saving, 6-pin TDFN package, and is specified over the automotive operating temperature range (-40°C to +125°C).

An evaluation kit is available:  MAX9945EVKIT  

Key Features   Applications/Uses
  • +4.75V to +38V Single-Supply Voltage Range
  • ±2.4V to ±19V Dual-Supply Voltage Range
  • Rail-to-Rail Output Voltage Swing
  • 400µA Low Quiescent Current
  • 50fA Low Input Bias Current
  • 1fA/ Low Input Current Noise
  • 15nV/ Low Noise
  • 3MHz Unity-Gain Bandwidth
  • Wide Temperature Range from -40°C to +125°C
  • Available in Space-Saving, 6-Pin TDFN Package (3mm x 3mm)

 

Key Specifications:  Operational Amplifiers
Part Number Amps. Rail to Rail AVCL VSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Amp.
(µA)
ICC per Amp.
(µA)
VOS
(µV)
CMRR @DC
(dB)
PSRR @DC
(dB)
Unity Gain BW
(MHz)
Slew Rate
(V/µs)
en
(nV/√Hz)
in
(pA/√Hz)
Low Pwr. Shutdn Package/Pins Price
min min max typ max max typ typ typ typ See Notes
MAX9945  1 Output Only 1 4.75 38 400 700 5000 94 100 3 2.2 15 0.001 No
µMAX/8
TDFN-EP/6
$0.75 @1k
See All Operational Amplifiers (145)

Diagram
MAX9945: Typical Operating Circuit
Typical Operating Circuit

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    Document Ref.: 19-4396; Rev 0; 2009-02-10
    This page last modified: 2009-07-15


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