Features: 6.95V Shunt Reference
Guaranteed 0.5ppm/°C Temperature Coeffi cient
Guaranteed 1 Maximum Dynamic Impedance
Guaranteed 20VRMS Maximum Noise
Guaranteed Initial Tolerance of 2%
Wide Operating Current Range
Available in 4-Lead TO-46 Metal CanApplication Precision Voltage Reference for Multimeters
Calibration Equipment Voltage Standards
Laboratory Measurement Equipment
Industrial Monitor/Control Instruments
High Accuracy Data ConvertersSpecifications
| Initial Accuracy (+/-) Max |
1.2 % |
| Reference Voltage |
6.95 V |
| Tempco, max (ppm/C) |
0.05 ppm |
| Operating Current |
0.5 mA |
| Output Current |
10 mA |
| Temperature Min |
-55 deg C |
| Temperature Max |
125 deg C |
| View Using Catalog |
Temperature Stabilizer .................................................40V
Reverse Breakdown Current ......................................20mA
Forward Current ..........................................................1mA
Reference to Substrate Voltage, VRS (Note 2) ..........0.1V
Operating Temperature Range
LM199/LM199A (OBSOLETE) ................. 55°C to 125°C
LM399/LM399A ........................................... 0°C to 70°C
Storage Temperature Range
LM199/LM199A (OBSOLETE) ................ 65°C to 150°C
LM399/LM399A .................................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................... 300°CDescriptionThe LM199 series are precision, temperature-stabilized monolithic zeners offering temperature coefficients a factor of ten better than high quality reference zeners. Constructed on a single monolithic chip is a temperature stabilizer circuit and an active reference zener. The active circuitry reduces the dynamic impedance of the zener to about 0.5 and allows the zener to operate over 0.5 mA to 10 mA current range with essentially no change in voltage or temperature coefficient. Further, a new subsurface zener structure gives low noise and excellent long term stability compared to ordinary monolithic zeners. The package is supplied with a thermal shield to minimize heater power and improve temperature regulation.
The LM199 series references are exceptionally easy to use and free of the problems that are often experienced with ordinary zeners. There is virtually no hysteresis in reference voltage with temperature cycling. Also, the LM199 is free of voltage shifts due to stress on the leads. Finally, since the unit is temperature stabilized, warm up time is fast.
The LM199 can be used in almost any application in place of ordinary zeners with improved performance. Some ideal applications are analog to digital converters, calibration standards, precision voltage or current sources or precision power supplies. Further in many cases the LM199 can replace references in existing equipment with a minimum of wiring changes.
The LM199 series devices are packaged in a standard hermetic TO-46 package inside a thermal shield. The LM199 is rated for operation from -55°C to +125°C while the LM299 is rated for operation from -25°C to +85°C and the LM399 is rated from 0°C to +70°C.
Application Notes
| Title |
Size in Kbytes |
Date |
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| AN-161: Application Note 161 IC Voltage Reference has 1ppm per Degree Drift |
138 Kbytes |
10-Oct-02 |
Download |
| AN-184: Application Note 184 References for A/D Converters |
64 Kbytes |
3-Oct-02 |
Download |
AN-184 (Japanese): Application Note 184 References for A/D Converters
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124 Kbytes |
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More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-222: Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise |
399 Kbytes |
1-Oct-02 |
Download |
| AN-110: Application Note 110 Fast IC Power Transistor with Thermal Protection |
333 Kbytes |
3-Oct-02 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM199 Data Sheet
