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Details, datasheet, quote on part number:LM185BXH-2.5/883
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Datasheet text preview:
LM185-2.5/LM285-2.5/LM385-2.5 Micropower Voltage Reference Diode
December 1999
LM185-2.5/LM285-2.5/LM385-2.5 Micropower Voltage Reference Diode
General Description
The LM185-2.5/LM285-2.5/LM385-2.5 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 20 µA to 20 mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM-185-2.5 band-gap reference uses only transistors and resistors, low noise and good long term stability result. Careful design of the LM185-2.5 has made the device exceptionally 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 LM185-2.5 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. For applications requiring 1.2V see LM185-1.2. The LM185-2.5 is rated for operation over a -55°C to 125°C temperature range while the LM285-2.5 is rated -40°C to 85°C and the LM385-2.5 0°C to 70°C. The LM185-2.5/ LM285-2.5 are available in a hermetic TO-46 package and the LM285-2.5/LM385-2.5 are also available in a low-cost TO-92 molded package, as well as S.O. and SOT-23. The LM185-2.5 is also available in a hermetic leadless chip carrier package.
Features
n n n n n n
± 20 mV ( ± 0.8%) max. initial tolerance (A grade) Operating current of 20 µA to 20 mA 0.6 dynamic impedance (A grade) Low temperature coefficient Low voltage reference -- 2.5V 1.2V device and adjustable device also available -- LM185-1.2 series and LM185 series, respectively
Connection Diagrams
TO-92 Plastic Package SO Package
DS005519-8
Bottom View Order Number LM285Z-2.5, LM285BXZ-2.5, LM285BYZ-2.5 LM385Z-2.5, LM385AXZ-2.5 LM385AYZ-2.5, LM385BZ-2.5, LM385BXZ-2.5 or LM385BYZ-2.5 See NS Package Number Z03A
DS005519-11
Order Number LM285M-2.5, LM285BXM-2.5, LM285BYM-2.5 LM385M-2.5, LM385BM-2.5 LM385BXM-2.5 or LM385BYM-2.5 See NS Package Number M08A
SOT-23
DS005519-29
* Pin 3 is attached to the Die Attach Pad (DAP) and should be connected to Pin 2 or left floating.
Order Number LM385M3-2.5 See NS Package Number MA03B
© 1999 National Semiconductor Corporation
DS005519
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LM185-2.5/LM285-2.5/LM385-2.5
Connection Diagrams
(Continued) LCC Leadless Chip Carrier
DS005519-14
Order Number LM185E-2.5/883 See NS Package Number E20A TO-46 Metal Can Package
DS005519-13
Bottom View Order Number LM185H-2.5, LM185H-2.5/883, LM185BXH-2.5, LM185BXH-2.5/883, LM185BYH-2.5, LM185BYH2.5/883, LM285H-2.5, or LM285BYH-2.5 See NS Package Number H02A
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LM185-2.5/LM285-2.5/LM385-2.5
Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Reverse Current Forward Current Operating Temperature Range (Note 3) LM185-2.5 LM285-2.5 LM385-2.5 Storage Temperature 30 mA 10 mA -55°C to + 125°C -40°C to + 85°C 0°C to 70°C -55°C to + 150°C Soldering Information TO-92 Package (10 sec.) 260°C TO-46 Package (10 sec.) 300°C SO and SOT Package Vapor Phase (60 sec.) 215°C Infrared (15 sec.) 220°C See AN-450 "Surface Mounting Methods and Their Effect on Product Reliability" for other methods of soldering surface mount devices.
Electrical Characteristics
(Note 4) LM385A-2.5 LM385AX-2.5 Parameter Conditions Typ LM385AY-2.5 Tested Limit (Note 5) Reverse Breakdown Voltage 2.500 Minimum Operating Current Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Wideband Noise (rms) Long Term Stability 1 mA IR 20 mA IR = 100 µA, f = 20 Hz IR = 100 µA 10 Hz f 10 kHz IR = 100 µA, T = 1000 Hr, TA = 25°C ± 0.1°C Average Temperature Coefficient (Note 7) IMIN IR 20 mA X Suffix Y Suffix All Others 30 50 150 ppm/°C (Max) 20 ppm 0.2 120 10 20 0.6 1.5 µV IMIN IR 1mA 1 1.5 12 18 IR = 100 µA 2.500 2.480 2.520 2.470 2.530 20 Design Limit (Note 6) V(Min) V(Max) V(Min) V(Max) µA (Max) mV (Max) mV (Max) Units (Limits)
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