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LM185H-1.2 Datenblatt(PDF) 1 Page - National Semiconductor (TI) |
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LM185H-1.2 Datenblatt(HTML) 1 Page - National Semiconductor (TI) |
1 / 10 page LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode General Description The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 10 µA to 20 mA current range, they feature exception- ally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM185-1.2 band-gap reference uses only transis- tors and resistors, low noise and good long term stability re- sult. Careful design of the LM185-1.2 has made the device ex- ceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain of the LM185-1.2 makes it useful for micropower circuitry. This voltage reference can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further, the wide operating current allows it to replace older references with a tighter tolerance part. The LM185-1.2 is rated for operation over a −55˚C to 125˚C temperature range while the LM285-1.2 is rated −40˚C to 85˚C and the LM385-1.2 0˚C to 70˚C. The LM185-1.2/ LM285-1.2 are available in a hermetic TO-46 package and the LM285-1.2/LM385-1.2 are also available in a low-cost TO-92 molded package, as well as SO and SOT-23. The LM185-1.2 is also available in a hermetic leadless chip car- rier package. Features n ± 4mV(±0.3%) max. initial tolerance (A grade) n Operating current of 10 µA to 20 mA n 0.6 Ω max dynamic impedance (A grade) n Low temperature coefficient n Low voltage reference — 1.235V n 2.5V device and adjustable device also available n LM185-2.5 series and LM185 series, respectively Connection Diagrams T0-92 Plastic Package (Z) DS005518-10 Bottom View Order Number LM285Z-1.2, LM285BXZ-1.2, LM285BYZ-1.2 LM385Z-1.2, LM385BZ-1.2 LM385BXZ-1.2 or LM385BYZ-1.2 See NS Package Number Z03A SOT23 DS005518-33 * Pin 3 is attached to the Die Attach Pad (DAP) and should be connected to Pin 2 or left floating. Order Number LM385M3-1.2 See NS Package Number MA03B January 2000 © 2000 National Semiconductor Corporation DS005518 www.national.com |
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