LT1021 - Precision Reference
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%.
Features
Typical Application  | Applications
Packaging  |
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LT1021BCH-5 | TO-5 | C | $8.40 | $6.90 |
| LT1021BCN8-10#PBF | N-8 | C | $6.42 | $5.25 |
| LT1021BCN8-5#PBF | N-8 | C | $6.42 | $5.25 |
| LT1021BCN8-7#PBF | N-8 | C | $6.42 | $5.25 |
| LT1021BMH-10 | TO-5 | M | $18.25 | $15.00 |
| LT1021BMH-5 | TO-5 | M | $18.25 | $15.00 |
| LT1021CCH-5 | TO-5 | C | $6.25 | $5.15 |
| LT1021CCN8-10#PBF | N-8 | C | $4.25 | $3.50 |
| LT1021CCN8-5#PBF | N-8 | C | $4.25 | $3.50 |
| LT1021CIN8-10#PBF | N-8 | I | $5.75 | $4.65 |
| LT1021CIN8-5#PBF | N-8 | I | $5.75 | $4.65 |
| LT1021CMH-5 | TO-5 | M | $10.00 | $8.20 |
| LT1021DCN8-10#PBF | N-8 | C | $3.17 | $2.65 |
| LT1021DCN8-5#PBF | N-8 | C | $3.17 | $2.65 |
| LT1021DCN8-7#PBF | N-8 | C | $2.08 | $1.75 |
| LT1021DCS8-10#PBF | SO-8 | C | $3.92 | $3.20 |
| LT1021DCS8-10#TRPBF | SO-8 | C | $3.26 | |
| LT1021DCS8-5#PBF | SO-8 | C | $3.92 | $3.20 |
| LT1021DCS8-5#TRPBF | SO-8 | C | $3.26 | |
| LT1021DCS8-7#PBF | SO-8 | C | $3.92 | $3.20 |
| LT1021DCS8-7#TRPBF | SO-8 | C | $3.26 | |
| LT1021DIN8-10#PBF | N-8 | I | $4.25 | $3.50 |
| LT1021DIN8-5#PBF | N-8 | I | $4.25 | $3.50 |
- AN13 - High Speed Comparator Techniques
- AN14 - Designs for High Performance Voltage-to-Frequency Converters
- AN17 - Considerations for Successive Approximation A ->D Converters
- AN23 - Micropower Circuits for Signal Conditioning
- AN29 - Some Thoughts on DC-DC Converters
- AN42 - Voltage Reference Circuit Collection
- AN43 - Bridge Circuits
- AN62 - Data Acquisition Circuit Collection
- AN7 - Some Techniques for Direct Digitization of Transducer Outputs
- AN74 - Component and Measurement Advances Ensure 16-Bit DAC Settling Time
- AN82 - Understanding and Applying Voltage References
- AN86 - A Standards Lab Grade 20-Bit DAC with 0.1ppm/° Drift: The Dedicated Art of Digitizing One Part Per Million
- DN10 - Electrically Isolating Data Acquisition Systems
- DN138 - Micropower ADC and DAC in SO-8 Give PCs a 12-Bit Analog Interface
- DN19 - A Two Wire Isolated and Powered 10-Bit Data Acquisition System
- DN29 - A Single Supply RS232 Interface for Bipolar A to D Converters
- DN294 - 250ksps, 16-Bit Micropower ADC Offers an Excellent Combination of SIze, Power and Speed
- DN35 - 12-Bit 8-Channel Data Acquisition System Interfaces to IBM PC Serial Port
- R003 Reliability Data
- Aug 1998 Component and Measurement Advances Ensure 16-Bit DAC Settling Time (Part One)
- March 2009 - How to Choose a Voltage Reference
- May 2000 Dual Operational Amplifier Combines 16-Bit Precision with High Speed
- LT1021 Footprints and Symbols
