This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

ADI LT1028 Op Amps Low Noise Operational Amplifier

Low Noise Operational Amplifier

Ovaga Certification

Brands: Analog Devices, Inc

Mfr.Part #: LT1028 Op Amps Low Noise Operational Amplifier

Datasheet: LT1028 Op Amps Low Noise Operational Amplifier Datasheet (PDF)


Product Type: Integrated Circuits (ICs)

RoHS Status:

Stock Condition: 2319 pcs, New Original

Add To Bom

Quick Quote

Please submit RFQ for LT1028 Op Amps Low Noise Operational Amplifier or email to us: Email: [email protected], we will contact you within 12 hours.

LT1028 Op Amps Low Noise Operational Amplifier General Description

The LT1028 and LT1128 are high-performance operational amplifiers (op-amps) designed to provide extremely low noise and high precision for a wide range of applications. 

These op-amps are known for their exceptionally low noise characteristics. They have a voltage noise of 0.85nV/√Hz at 1kHz and 1.0nV/√Hz at 10Hz. This low noise level makes them suitable for applications where noise is a critical factor, such as high-precision measurements and instrumentation.

Despite their low noise, the LT1028 and LT1128 also offer high-speed performance. The LT1028 has a gain-bandwidth product of 75MHz, while the LT1128 has a gain-bandwidth product of 20MHz. This makes them suitable for applications that require both low noise and high-speed signal processing.

The LT1028 is stable at a gain of -1, while the LT1128 is stable at a gain of +1. This allows you to configure the op-amp for inverting or non-inverting amplifier configurations, depending on your specific application requirements.

These op-amps provide true precision parameters, with low drift (0.1µV/°C), low offset voltage (10µV), and a high voltage gain (30 million). This level of precision is essential in applications where accuracy and stability are critical.

Despite the high collector current in the input stage (approximately 1mA), the input bias current is only 25nA. This low input bias current is important in applications where the input impedance of the circuit needs to be preserved and not significantly loaded.

The voltage noise of the LT1028/LT1128 is less than that of a 50 Ohm resistor. This means that in applications with very low source impedance, such as transducer or audio amplifier applications, the contribution of these op-amps to the total system noise will be negligible.

Pin Configuration


Feature LT1028 LT1128
Voltage Noise at 1kHz Max: 1.1nV/√Hz Max: 1.1nV/√Hz
  Typ: 0.85nV/√Hz Typ: 0.85nV/√Hz
Voltage Noise at 10Hz Typ: 1.0nV/√Hz Typ: 1.0nV/√Hz
Peak-to-Peak Voltage Noise
Typ: 35nVP-P (0.1-10Hz)
Gain-Bandwidth Product Min: 50MHz Min: 13MHz
Slew Rate Min: 11V/µs Min: 5V/µs
Offset Voltage Max: 40µV Max: 40µV
Drift with Temperature Max: 0.8µV/°C  
Voltage Gain Min: 7 Million Min: 7 Million
Voltage and Current Noise 100% Tested 100% Tested
Package 8-Pin SO 8-Pin SO


LT1028 Evaluation Kit

The LT1028 Evaluation Kit DC417B is a tool designed to help users evaluate and test the LT1028 operational amplifier. This kit typically includes a variety of components and features to make it easier to assess the performance of the LT1028 op-amp. 


The LT1028 and LT1128 operational amplifiers are well-suited for a variety of applications that require low noise, high precision, and high-speed performance. 

Low Noise Frequency Synthesizers: These op-amps are ideal for low noise voltage-controlled oscillators and frequency synthesizers, where precise signal generation and minimal phase noise are crucial.

High-Quality Audio: In audio equipment, the LT1028 and LT1128 can be used in preamplifiers and audio signal processing circuits to achieve high fidelity and low distortion audio reproduction.

Infrared Detectors: These op-amps can be used in signal conditioning and amplification of low-level signals from infrared detectors, ensuring minimal noise and high sensitivity in infrared applications.

Accelerometer and Gyro Amplifiers: For inertial measurement units (IMUs) and sensor systems, these op-amps are suitable for amplifying signals from accelerometers and gyroscopes with precision and low noise.

350 Ohms Bridge Signal Conditioning: The op-amps can be used for conditioning signals from strain gauges and other bridge transducers, providing accurate and low-noise measurements in strain gauge-based sensor applications.

Magnetic Search Coil Amplifiers: In magnetic field measurement systems, such as magnetic search coil sensors used in geophysics or electromagnetic research, these op-amps can amplify weak magnetic field signals with high precision.

Hydrophone Amplifiers: For underwater acoustics and sonar applications, hydrophones can benefit from the low noise and high precision amplification provided by these op-amps.

Related Parts


Part Number Package Description
Specified Temperature Range
LT1028ACN8#PBF 8-Pin PDIP (N8) -40°C to 85°C
LT1028CN8#PBF 8-Pin PDIP (N8) -55°C to 125°C
LT1128ACN8#PBF 8-Pin PDIP (N8) -40°C to 85°C
LT1128CN8#PBF 8-Pin PDIP (N8) -55°C to 125°C
LT1028CS8#PBF 8-Pin SOIC (S8) -55°C to 125°C
LT1128CS8#PBF 8-Pin SOIC (S8) -55°C to 125°C
LT1028CSW#PBF 8-Pin SO (SW) -55°C to 125°C


Absolute Maxium Rating


Parameter Specification
Supply Voltage
-55°C to 105°C: ±22V<br>105°C to 125°C: ±16V
Differential Input Current (Note 9) ±25mA
Input Voltage Equal to Supply Voltage
Output Short-Circuit Duration Indefinite
Operating Temperature Range
LT1028/LT1128AM, M (OBSOLETE): -55°C to 125°C<br>LT1028/LT1128AC, C (Note 11): -40°C to 85°C
Storage Temperature Range All Devices: -65°C to 150°C
Lead Temperature (Soldering, 10 sec.) 300°C


Typical Application

What is the difference between LT1028 and LT1128

The primary difference between the LT1028 and LT1128 operational amplifiers lies in their gain configurations and gain-bandwidth products. 

Gain Configuration:

LT1028: The LT1028 is designed to be stable at a gain of -1. This means it is typically used as an inverting amplifier or for applications where signal inversion is required.
LT1128: The LT1128 is designed to be stable at a gain of +1. It is commonly used as a non-inverting amplifier or for applications where signal gain without inversion is needed.

Gain-Bandwidth Product:
LT1028: The LT1028 has a higher gain-bandwidth product of 75 MHz. This means it can provide a wider bandwidth for a given gain setting, making it suitable for applications that require both high gain and high-frequency performance.
LT1128: The LT1128 has a lower gain-bandwidth product of 20 MHz. While it still offers high precision and low noise, it has a more limited bandwidth compared to the LT1028.

LT1028 Replacement

The LT1028 is a precision operational amplifier (op-amp) manufactured by Linear Technology (now part of Analog Devices). If you are looking for a replacement for the LT1028, you can consider other precision op-amps with similar characteristics and performance specifications. 

LT1128: This is another precision op-amp from Linear Technology (now part of Analog Devices). It has similar characteristics and can be a direct replacement for the LT1028.

AD797: This is a precision op-amp from Analog Devices with excellent low noise and low distortion performance. It can be a good replacement for the LT1028 in many applications.

OPA134: The OPA134 is a precision op-amp from Texas Instruments known for its low noise and high accuracy. It's suitable for many precision applications and can be used as an alternative to the LT1028.

OP27: The OP27 is a precision op-amp from Analog Devices with good performance characteristics and is often used as a substitute for the LT1028 in certain applications.

ADA4627: Another precision op-amp from Analog Devices, the ADA4627 offers low noise and high precision performance and can be considered as a replacement for the LT1028.

When selecting a replacement op-amp, make sure to check the datasheets of both the LT1028 and the replacement op-amp to ensure that the electrical characteristics, pinout, and voltage supply requirements are compatible with your specific application. 

LT1028 Spice Model


Shipping Type Ship Fee Lead Time
DHL DHL $20.00-$40.00 (0.50 KG) 2-5 days
Fedex Fedex $20.00-$40.00 (0.50 KG) 2-5 days
UPS UPS $20.00-$40.00 (0.50 KG) 2-5 days
TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

Processing Time:Shipping fee depend on different zone and country.


Terms of payment Hand Fee
Wire Transfer Wire Transfer charge US$30.00 banking fee.
Paypal Paypal charge 4.0% service fee.
Credit Card Credit Card charge 3.5% service fee.
Western Union Western Union charge US$0.00 banking fee.
Money Gram Money Gram charge US$0.00 banking fee.


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

LT1028 Op Amps Low Noise Operational Amplifier FAQ

  • Where can I find the Datasheet PDF for LT1028 Op Amps Low Noise Operational Amplifier?

    You can find the Datasheet for LT1028 Op Amps Low Noise Operational Amplifier on this page. If it is not available, you can contact our sales team to inquire about the Datasheet for this part.

  • Do I need to register an account to request a quote?

    No, you do not need to register an account. Simply submit the required product quantity, contact name, and email in the QUICK QUOTE section on the current page, and our sales team will contact you as soon as they receive your email.

  • Will I receive an order confirmation email?

    Yes, you will receive a confirmation email when you place your order. Once your order is shipped, you will also receive another confirmation email containing a tracking number.

  • Can I view the order for the LT1028 Op Amps Low Noise Operational Amplifier model or all my past orders?

    Yes, you can view the status of your current orders and your order history by logging in or registering an account online. Log in or Register an account now.

  • What is the pinout for LT1028 Op Amps Low Noise Operational Amplifier?

    Generally, our product pages include pin diagrams, pinouts, and pin details for the LT1028 Op Amps Low Noise Operational Amplifier part. If you cannot find the information you need, you can contact Ovaga at [email protected], and our customer support team will get in touch with you as soon as possible to address your concerns.

  • What is the lifespan of LT1028 Op Amps Low Noise Operational Amplifier?

    The lifespan of LT1028 Op Amps Low Noise Operational Amplifier depends on various factors, including the quality of components, operating conditions, and usage. Please refer to the datasheet of LT1028 Op Amps Low Noise Operational Amplifier for specific information.

We provide high quality products, thoughtful service and after sale guarantee

  • products

    We have rich products, can meet your various needs.

  • quantity

    Minimum order quantity starts from 1pcs.

  • shipping

    Lowest international shipping fee starts from $0.00

  • guarantee

    365 days quality guarantee for all products

Ratings and Reviews

Please rate the product !
Please enter a comment

Please submit comments after logging into your account.