LM285M-2.5 National Semiconductor, LM285M-2.5 Datasheet

Voltage Reference

LM285M-2.5

Manufacturer Part Number
LM285M-2.5
Description
Voltage Reference
Manufacturer
National Semiconductor
Datasheet

Specifications of LM285M-2.5

Peak Reflow Compatible (260 C)
No
Current Rating
10A
Leaded Process Compatible
No
Reference Volt Tolerance ±%
0.8%
Mounting Type
Surface Mount
Supply Current
10mA
Package / Case
8-SOIC-NARROW
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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Quantity:
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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

Related parts for LM285M-2.5

LM285M-2.5 Summary of contents

Page 1

... 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 Order Number LM285M-2.5, LM285BXM-2.5, LM285BYM-2.5 LM385BXM-2.5 or LM385BYM-2.5 See NS Package Number M08A SOT-23 00551929 Order Number LM385M3-2.5 ...

Page 2

Connection Diagrams LCC Leadless Chip Carrier Order Number LM185E-2.5/883 See NS Package Number E20A www.national.com (Continued) 00551914 2 TO-46 Metal Can Package 00551913 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 ...

Page 3

... Absolute Maximum Ratings 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 −55˚ 125˚C LM285-2.5 Electrical Characteristics (Note 4) Parameter Reverse Breakdown I = 100 µ ...

Page 4

Electrical Characteristics Parameter Conditions Reverse T = 25˚C, A Breakdown 20 µA ≤ I ≤ 20 Voltage R mA Minimum Operating LM385M3-2.5 Current 20 µA ≤ I ≤ 1 Reverse R Breakdown ≤ I ≤ 20 Voltage ...

Page 5

Note 4: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T Note 5: Guaranteed and 100% production tested. Note 6: Guaranteed, but not 100% production tested. These limits are not used to calculate average ...

Page 6

Typical Performance Characteristics Noise Voltage Response Time Applications Wide Input Range Reference 00551912 Micropower Reference from 9V Battery 00551902 www.national.com (Continued) Filtered Output Noise 00551921 00551923 LM385-2.5 Applications Micropower 5V Reference (Note µA Note ...

Page 7

LM385-2.5 Applications Micropower 10V Reference (Note 10 µA standby current Note 10 Precision 1 µ Current Sources (Continued) 00551910 00551924 7 00551925 www.national.com ...

Page 8

LM385-2.5 Applications METER THERMOMETERS 0˚C–100˚C Thermomemter Calibration 1. Short LM385-2.5, adjust R3 for I 2. Remove short, adjust R2 for correct reading in centigrade 0˚F–50˚F Thermomemter Calibration 1. Short LM385-2.5, adjust R3 for I 2. Remove short, adjust R2 for ...

Page 9

LM385-2.5 Applications Schematic Diagram (Continued) Improving Regulation of Adjstable Regulators 00551907 9 00551901 www.national.com ...

Page 10

Physical Dimensions unless otherwise noted Order Number LM185H-2.5, LM185H-2.5/883, LM185BXH-2.5, LM185BXH-2.5/883, LM185BYH-2.5, LM185BYH-2.5/883, LM285H-2.5, or LM285BYH-2.5 www.national.com inches (millimeters) Order Number LM185E-2.5/883 NS Package Number E20A TO-46 Metal Can Package (H) NS Package Number H02A 10 ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) SOT-23 Package (M3) Order Number LM385M3-2.5 NS Package Number MA03B 11 www.national.com ...

Page 12

... Physical Dimensions Order Number LM285M-2.5, LM285BXM-2.5, LM285BYM-2.5, LM385M-2.5, LM385BM-2.5, LM385BXM-2.5 or LM385BYM-2.5 www.national.com inches (millimeters) unless otherwise noted (Continued) Small Outline (SO-8) Package (M) NS Package Number M08A 12 ...

Page 13

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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