Overview
Features and Benefits
- High Accuracy:
- A Grade—0.05% Max
- B Grade—0.1% Max
- Low Drift:
- A Grade—10ppm/°C Max
- B Grade—25ppm/°C Max
- Low Thermal Hysteresis 40ppm (Typical) –40°C to 85°C
- Low Supply Current: 60µA Max
- Sinks and Sources Current
- Low Dropout Voltage
- Guaranteed Operational –40°C to 125°C
- Wide Supply Range to 18V
- Available Output Voltage Options: 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V and 5V
- Low Profile (1mm) ThinSOT™ Package
Product Details
The LT1790 is a family of SOT-23 micropower low dropout series references that combine high accuracy and low drift with low power dissipation and small package size. These micropower references use curvature compensation to obtain a low temperature coefficient and trimmed precision thin-film resistors to achieve high output accuracy. In addition, each LT1790 is post-package trimmed to greatly reduce the temperature coefficient and increase the output accuracy. Output accuracy is further assured by excellent line and load regulation. Special care has been taken to minimize thermally induced hysteresis.
The LT1790s are ideally suited for battery-operated systems because of their small size, low supply current and reduced dropout voltage. These references provide supply current and power dissipation advantages over shunt references that must idle the entire load current to operate. Since the LT1790 can also sink current, it can operate as a micropower negative voltage reference with the same performance as a positive reference.
Applications
- Handheld Instruments
- Negative Voltage References
- Industrial Control Systems
- Data Acquisition Systems
- Battery-Operated Equipment
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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R373 Reliability Data3/23/2018
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DN229 - Don't Be Fooled By Voltage Reference Long-Term Drift and Hysteresis8/5/2014
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DN331 - Dual 25µV Micropower Op Amp Fits in 3mm x 3mm Package7/28/2014
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DN341 - 16-Bit ADC Simplifies Current Measurements6/27/2014
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Design Note 448: 12-bit DAC in TSOT-23 Includes Bidirectional REF Pin for Connection to Op Amp or External High Precision Reference8/8/2008
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DN426 - 6-Channel SAR ADCs for Industrial Monitoring and Portable11/5/2007
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Precision Voltage References6/23/2017
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Precise Current Sense Amplifiers Operate from 4V to 60V12/1/2006 LT Journal
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Low Noise, Micropower Precision Op Amp Swings Outputs from Rail to Rail9/1/2003 LT Journal
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SOT-23 Voltage Reference Has 0.05% Initial Accuracy, 10ppm/°C Tempco, Operates on 35µA9/1/2000 LT Journal
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, 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.
Models for the following parts are available in LTspice:
LT1790-1.25
LT1790-2.048
LT1790-2.5
LT1790-3
LT1790-3.3
LT1790-4.096
LT1790-5
Reference Designs (1)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
Support & Discussions
LT1790 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.