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LT1021: Precision Reference Data Sheet8/28/2007
Overview
Features and Benefits
- Ultralow Drift: 5ppm/°C Max Slope
- Very Low Noise: P-P (0.1Hz to 10Hz)
- 100% Noise Tested
- Pin Compatible with Most Bandgap Reference Applications, Including REF01, REF02, LM368, MC1400 and MC1404 with Greatly Improved Stability, Noise and Drift
- Trimmed Output Voltage
- Operates in Series or Shunt Mode
- Output Sinks and Sources in Series Mode
- >100dB Ripple Rejection
- Minimum Input/Output Differential of 1V
- Available in 5-Lead Can, N8 and S8 Packages
Product Details
The LT1021 is a precision reference with ultralow drift and noise, extremely good long term stability and almost total immunity to input voltage variations. The reference output will both source and sink up to 10mA. Three voltages are available: 5V, 7V and 10V. The 7V and 10V units can be used as shunt regulators (two-terminal zeners) with the same precision characteristics as the three terminal connection. Special care has been taken to minimize thermal regulation effects and temperature induced hysteresis.
The LT1021 references are based on a buried zener diode structure that eliminates noise and stability problems associated with surface breakdown devices. Further, a subsurface zener exhibits better temperature drift and time stability than even the best bandgap references.
Unique circuit design makes the LT1021 the first IC reference to offer ultralow drift without the use of high power on-chip heaters.
The LT1021-7 uses no resistive divider to set output voltage, and therefore exhibits the best long term stability and temperature hysteresis. The LT1021-5 and LT1021- 10 are intended for systems requiring a precise 5V or 10V reference with an initial tolerance as low as ±0.05%.
Applications
- A/D and D/A Converters
- Precision Regulators
- Digital Voltmeters
- Inertial Navigation Systems
- Precision Scales
- Portable Reference Standard
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.
Documentation & Resources
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R003 Reliability Data3/26/2018
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AN29 - Some Thoughts on DC-DC Converters3/8/2013
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AN17 - Considerations for Successive Approximation A ->D Converters8/15/2012
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AN13 - High Speed Comparator Techniques8/15/2012
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AN43 - Bridge Circuits7/10/2012
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AN82 - Understanding and Applying Voltage References2/3/2011
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AN42 - Voltage Reference Circuit Collection2/3/2011
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AN23 - Micropower Circuits for Signal Conditioning6/7/2010
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AN14 - Designs for High Performance Voltage-to-Frequency Converters3/26/2010
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AN7 - Some Techniques for Direct Digitization of Transducer Outputs3/26/2010
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AN74 - Component and Measurement Advances Ensure 16-Bit DAC Settling Time8/20/2007
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AN62 - Data Acquisition Circuit Collection8/20/2007
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DN35 - 12-Bit 8-Channel Data Acquisition System Interfaces to IBM PC Serial Port7/22/2014
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DN19 - A Two Wire Isolated and Powered 10-Bit Data Acquisition System7/9/2014
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DN138 - Micropower ADC and DAC in SO-8 Give PCs a 12-Bit Analog Interface6/27/2014
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DN294 - 250ksps, 16-Bit Micropower ADC Offers an Excellent Combination of SIze, Power and Speed8/21/2007
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Design Note 29: A Single Supply RS232 Interface for Bipolar A to D Converters11/1/1989
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Design Note 10: Electrically Isolating Data Acquisition Systems4/1/1988
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Dual Operational Amplifier Combines 16-Bit Precision with High Speed5/1/2000 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.
Models for the following parts are available in LTspice:
LT1021-10
LT1021-5
LT1021-7
Product Recommendations
LT1021 Companion Parts
Recommended Related Parts
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.
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Support & Discussions
LT1021 Discussions
Sample & Buy
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Lead Times
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