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Signal
ConditioningOperational
Amplifiers (Op Amps)Precision
Amplifiers
Signal
ConditioningOperational
Amplifiers (Op Amps)Low
Noise Amplifiers

Overview

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Info

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Boards

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Support

LT5400 - Quad Matched Resistor
Network

LT1028 - Ultra Low Noise Precision High Speed Op Amps

Features

Voltage Noise
1.1nV/rt Hz Max. at 1kHz
0.85nV/rt Hz Typ. at
1kHz
1.0nV/ rtHz Typ. at 10Hz

35nVP-P Typ., 0.1Hz to 10Hz

Gain-Bandwidth Product
LT1028: 50MHz Min.
LT1128: 13MHz
Min.

Slew Rate
LT1028: 11V/µs Min.
LT1128: 5V/µs Min.

Offset Voltage: 40µV Max.

Drift with Temperature: 0.8µV/°C Max.

Voltage Gain: 7 Million Min.

Voltage and Current Noise 100% Tested

Available in 8-Pin SO Package

Typical Application

Description

The LT1028 (gain of –1 stable)/LT1128(gain of +1 stable) achieve a new
standard of excellence in noise performance with 0.85nV/Rt.Hz 1kHz noise,
1.0nV/Rt.Hz 10Hz noise. This ultralow noise is combined with excellent high
speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for
LT1128), distortion-free output, and true precision parameters (0.1µV/°C drift,
10µV offset voltage, 30 million voltage gain). Although the LT1028/LT1128 input
stage operates at nearly 1mA of collector current to achieve low voltage noise,
input bias current is only 25nA.

The LT1028/LT1128’s voltage noise is less than the noise of a 50 Ohm
resistor. Therefore, even in very low source impedance transducer or audio
amplifier applications, the LT1028/LT1128’s contribution to total system noise
will be negligible.

Packaging
For complete and up to date package information and drawings,
please refer to our packaging page

Part Number

Package

Code

Temp

Package
Drawing

RoHS

LT1028ACN8#PBF

N-8

N

C

05-08-1510
(N8)

Yes

LT1028CN8#PBF

N-8

N

C

05-08-1510
(N8)

Yes

LT1028CS8#PBF

SO-8

S8

C

05-08-1610
(S8)

Yes

LT1028CS8#TRPBF

SO-8

S8

C

05-08-1610
(S8)

Yes

LT1028CSW#PBF

SW-16

SW

C

05-08-1620
(SW16)

Yes

LT1028CSW#TRPBF

SW-16

SW

C

05-08-1620
(SW16)

Yes

Order Info

Part numbers ending in PBF are lead
free. Solder plated terminal finish (SnPb) versions are non-standard and
special terms and conditions and pricing applies if available. Please contact
LTC marketing for information.

Part numbers containing TR or TRM are shipped in tape
and reel or 500 unit mini tape and reel, respectively

Please refer to our general
ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number

Package

Temp

Price
(1-99)

Price
(1k)*

RoHS

LT1028ACN8#PBF

N-8

C

$8.75

$7.20

Yes

LT1028CN8#PBF

N-8

C

$5.75

$4.75

Yes

LT1028CS8#PBF

SO-8

C

$5.75

$4.75

Yes

LT1028CS8#TRPBF

SO-8

C

$4.81

Yes

LT1028CSW#PBF

SW-16

C

$6.58

$5.20

Yes

LT1028CSW#TRPBF

SW-16

C

$5.26

Yes

Buy
Now • Request
Samples

* The USA list pricing shown is
for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the
stated volume), and is subject to change. International prices may differ due to
local duties, taxes, fees and exchange rates. For volume-specific price or
delivery quotes, please contact your local Linear Technology sales
office or authorized distributor.

Demo Boards
Linear Technology offers many demo boards free of charge to
qualified customers. Contact your local
sales office or distributor to inquire about a demo board. Certain demo
boards are also available for sale via credit card on this website. Demo boards
are for evaluation purposes only. It remains the customer’s responsibility to
verify proper and reliable operation in the actual end application.

Part Number

Description

Price

Documentation

DC417B

DIP8, MS8, S8, SOT23-6 | Multi-Footprint General Purpose
Board for Single Op. Amp

Contact
Factory

View

Buy
Now

Click
here to view our complete list of demo boards

Applications

Low Noise Frequency Synthesizers

High Quality Audio

Infrared Detectors

Accelerometer and Gyro Amplifiers

350 ohms Bridge Signal Conditioning

Magnetic Search Coil Amplifiers

Hydrophone Amplifiers

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Product Notifications

Please login to your MyLinear account for notifications of datasheet updates,
new document releases and LTspice model announcements for your favorite
products. If you do not have a MyLinear account you may Sign
Up Now.

Email Address

Password

Forgot your password? Click here.
Need
help? Email [email-masked] with questions and
comments.

Design Tools

LTspiceIV

LTspice® IV is a
powerful, fast and free simulation tool, schematic capture and waveform viewer
with enhancements and models for improving the simulation of switching
regulators. Click here to download
LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

Step 1: If you have not installed LTspice on this
computer, download and install LTspice
IV

Step 2: Once LTspice is installed, click on the link(s)
below to launch the simulation

LT1028/LT1055/LT1634 Demo Circuit -
Super Low Distortion Variable Sine Wave Oscillator

Step 3: If LTspice IV does not automatically open after
clicking the link above, you can instead run the simulation by right clicking
on the link and selecting "Save Target As." After saving the file to your
computer, start LTspice and open the demonstration circuit by selecting 'Open'
from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit
our Demo Circuits
Collection.

Models for the following parts are available in LTspice
IV:
LT1028
LT1028A
LT1028CS
LT1028N

Technical Support

For immediate technical assistance, contact
your local sales office or distributor or call 1-800-4-LINEAR (US
customers only) or 408-432-1900.

For less urgent requests, please complete our Technical
Support Request Form. Please allow 2-3 business days for
reply.

Order Now

Order
Now

Request
Samples

Documentation

Datasheet

LT1028/LT1128
- Ultralow Noise Precision High Speed Op Amps

Application Note

AN141
- Risk Assessment Advice for High Reliability Amplifiers

AN21
- Composite Amplifiers

AN43
- Bridge Circuits

AN45
- Measurement and Control Circuit Collection

AN48
- Using the LTC Op Amp Macromodels

AN57
- Video Circuit Collection

Design Note

DN140
- Updated Operational Amplifier Selection Guide for Optimum Noise
Performance

DN15
- Noise Calculations in Op Amp Circuits

DN3
- Operational Amplifier Selection Guide for Optimum Noise Performance

DN42
- Chopper vs Bipolar Op Amps—An Unbiased Comparison

DN6
- Operational Amplifier Selection Guide for Optimum Noise
Performance

Reliability Data

R041
Reliability Data

Product Selector Card

High
Voltage Amplifiers

SAR
ADC Driver Amplifier Selector Guide

SAR
ADC Drivers

LT Journal

Sep 2000 Performance Verification of
Low Noise, Low Dropout Regulators

September
1999 - JFET Op Amps Equal Low Noise Bipolars and Have Picoamp Current
Noise

September 2009 -
Consider New Precision Amplifiers for Updated Industrial Equipment
Designs

LTspice

LT1028/LT1055/LT1634
Demo Circuit - Super Low Distortion Variable Sine Wave Oscillator

Related Solutions

Locating Shorts on Power Planes of
Multi-Layer PCBs

Paralleling Amplifiers Improves
Signal-to-Noise Performance

Sub-Microamp RMS Current Measurement
for Improved 32kHz Quartz Crystal Performance - LT1028, LT1222, LTC1563-2,
LTC1968, LT1077

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