Maxim > Products > Amplifiers and Comparators > MAX9945

MAX9945

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

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

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

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).

Data Sheet

Download	Rev 1	(PDF, 960kB)
E-Mail

An evaluation kit is available: MAX9945EVKIT

Key Features

+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)

Applications/Uses

Active Filters and Signal Processing
Automatic Test Equipment (ATE)
Chemical Sensor Interface
Displays: Industrial, Front Panel, and Instrumentation
High-Performance Audio Line Out
Industrial Sensors and Instrumentation
Industrial: Process Measurement and Control
Medical Pulse Oximetry
Panel Meters
Photodiode Sensor Interface
Power Meters
Programmable Logic Controllers (PLCs)

Key Specifications:

Operational Amplifiers

Part Number

Amps.

Rail to Rail

A_VCL

V_SUPPLY (Total)
(V)

I_CC per Amp.
(µA)

V_OS
(µV)

CMRR @DC
(dB)

PSRR @DC
(dB)

Unity Gain BW
(MHz)

Slew Rate
(V/µs)

e_n
(nV/√Hz)

i_n
(pA/√Hz)

Low Pwr. Shutdn

Package/Pins

Budgetary Price

min

max

typ

max

typ

See Notes

MAX9945

Output Only

4.75

400

700

5000

100

2.2

0.001

µMAX/8

TDFN-EP/6

$0.83 @1k

See All Operational Amplifiers (160)

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 prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

More Information

Topmark Coding	MAX9945
New Product Press Release	[ 2009-06-03 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-4396 Rev 1; 2010-12-17
This page last modified: 2010-12-17