LM385BMX-2.5 National Semiconductor, LM385BMX-2.5 Datasheet
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LM385BMX-2.5
Manufacturer Part Number
LM385BMX-2.5
Description
IC,VOLT REFERENCE,FIXED,2.5V,BIPOLAR,SOP,8PIN,PLASTIC
Manufacturer
National Semiconductor
Specifications of LM385BMX-2.5
Rohs Compliant
NO
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© 2005 National Semiconductor Corporation
LM185-2.5/LM285-2.5/LM385-2.5
Micropower Voltage Reference Diode
General Description
The
2-terminal band-gap voltage regulator diodes. Operating
over a 20 µA to 20 mA current range, they feature excep-
tionally low dynamic impedance and good temperature sta-
bility. On-chip trimming is used to provide tight voltage toler-
ance. 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 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 LM185-2.5 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. Fur-
ther, the wide operating current allows it to replace older
references with a tighter tolerance part. For applications
requiring 1.2V see LM185-1.2.
Connection Diagrams
* Pin 3 is attached to the Die Attach Pad (DAP) and should be connected to Pin 2 or left floating.
LM185-2.5/LM285-2.5/LM385-2.5
LM385BXZ-2.5 or LM385BYZ-2.5
See NS Package Number Z03A
LM285BXZ-2.5, LM285BYZ-2.5
LM385AYZ-2.5, LM385BZ-2.5,
Order Number LM285Z-2.5,
LM385Z-2.5, LM385AXZ-2.5
Plastic Package
Bottom View
TO-92
00551908
DS005519
are
See NS Package Number MA03B
Order Number LM385M3-2.5
micropower
SOT-23
00551929
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 Operating current of 20 µA to 20 mA
n 0.6Ω dynamic impedance (A grade)
n Low temperature coefficient
n Low voltage reference — 2.5V
n 1.2V device and adjustable device also
available — LM185-1.2 series and LM185 series,
respectively
±
20 mV (
LM385BXM-2.5 or LM385BYM-2.5
±
See NS Package Number M08A
LM285BXM-2.5, LM285BYM-2.5
0.8%) max. initial tolerance (A grade)
Order Number LM285M-2.5,
LM385M-2.5, LM385BM-2.5
SO Package
00551911
February 2005
www.national.com