LM185BYH-1.2 National Semiconductor, LM185BYH-1.2 Datasheet

no-image

LM185BYH-1.2

Manufacturer Part Number
LM185BYH-1.2
Description
Manufacturer
National Semiconductor
Datasheet
© 2005 National Semiconductor Corporation
LM185-1.2/LM285-1.2/LM385-1.2
Micropower Voltage Reference Diode
General Description
The
2-terminal band-gap voltage regulator diodes. Operating
over a 10µA to 20mA 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
result.
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.
Connection Diagrams
LM185-1.2/LM285-1.2/LM385-1.2
LM385BXZ-1.2 or LM385BYZ-1.2
See NS Package Number Z03A
LM285BXZ-1.2, LM285BYZ-1.2
Order Number LM285Z-1.2,
LM385Z-1.2, LM385BZ-1.2
Plastic Package (Z)
Bottom View
T0-92
00551810
DS005518
are
micropower
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
carrier package.
Features
n
n Operating current of 10µA to 20mA
n 1Ω dynamic impedance
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
* Pin 3 is attached to the Die Attach Pad (DAP) and should be connected
to Pin 2 or left floating.
±
1% and 2% initial tolerance
See NS Package Number MF03A
Order Number LM385M3-1.2
SOT23
00551833
February 2005
www.national.com

Related parts for LM185BYH-1.2

LM185BYH-1.2 Summary of contents

Page 1

... 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 © 2005 National Semiconductor Corporation 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 are micropower 85˚C and the LM385-1.2 0˚C to 70˚C. The LM185-1.2/ LM285-1 ...

Page 2

... Connection Diagrams SO Package Order Number LM285M-1.2, LM285BXM-1.2, LM285BYM-1.2 LM385M-1.2, LM385BM-1.2 LM385BXM-1.2 or LM385BYM-1.2 See NS Package Number M08A www.national.com (Continued) 00551809 Order Number LM185H-1.2, LM185H-1.2/883, 2 TO-46 Metal Can Package (H) 00551806 Bottom View LM185BXH-1.2, LM185BYH-1.2 LM285H-1.2 or LM285BXH-1.2 See NS Package Number H02A ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 2) Reverse Current Forward Current Operating Temperature Range (Note 3) LM185-1.2 LM285-1.2 LM385-1.2 Electrical Characteristics Parameter Conditions Reverse Breakdown T = 25˚C, A 10µA ≤ I ≤ ...

Page 4

Thermal Resistance θ (junction to ambient) JA θ (junction to case) JC 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 ...

Page 5

Typical Performance Characteristics Noise Voltage Response Time Typical Applications Wide Input Range Reference 00551808 Micropower Reference from 9V Battery 00551822 (Continued) 00551819 00551821 5 Filtered Output Noise 00551820 Reference from 1.5V Battery 00551823 www.national.com ...

Page 6

Typical Applications Micropower* 5V Regulator *I . 30µA Q Micropower* 10V Reference *I .20µA standby current Q www.national.com (Continued) Precision 1µA to 1mA Current Sources 00551824 00551825 6 00551826 00551827 ...

Page 7

Typical Applications (Continued) METER THERMOMETERS 0˚C−100˚C Thermometer Calibration 1. Short LM385-1.2, adjust R3 for I = temp at 1µA/˚K OUT 2. Remove short, adjust R2 for correct reading in centigrade † 1.3V.500µ 1.6V.2.4mA Q Lower ...

Page 8

Typical Applications Calibration 1. Adjust R1 so that V1 = temp at 1mV/˚K 2. Adjust V2 to 273.2mV † I for 1.3V to 1.6V battery volt- Q age = 50µA to 150µA Schematic Diagram www.national.com (Continued) Centigrade Thermometer 8 00551801 ...

Page 9

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM185H-1.2, LM185H-1.2/883, LM185BXH-1.2, LM185BYH-1.2, LM285H-1.2, or LM285BXH-1.2 TO-46 Metal Can Package (H) NS Package Number H02A SOT-23 Package (M3) Order Number LM385M3-1.2 NS Package Number MF03A 9 www.national.com ...

Page 10

Physical Dimensions Order Number LM285M-1.2, LM285BXM-1.2, LM285BYM-1.2 LM385M-1.2, LM385BM-1.2, LM385BXM-1.2, LM385BYM-1.2 www.national.com inches (millimeters) unless otherwise noted (Continued) Small Outline (SO-8) Package NS Package Number M08A 10 ...

Page 11

... 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. ...

Related keywords