LM185BYH2.5-SMD National Semiconductor Corporation, LM185BYH2.5-SMD Datasheet

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LM185BYH2.5-SMD

Manufacturer Part Number
LM185BYH2.5-SMD
Description
Micropower Voltage Reference Diode
Manufacturer
National Semiconductor Corporation
Datasheet
© 2005 National Semiconductor Corporation
Ordering Information
LM185-2.5QML
Micropower Voltage Reference Diode
General Description
The LM185-2.5 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 LM185-2.5 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.
Connection Diagrams
NS Part Number
LM185H-2.5-SMD
LM185H-2.5/883
LM185WG-2.5-QV
LM185WG-2.5/883
LM185BYH2.5/883
LM185BYH2.5-SMD
LM185BYH2.5-QV
See NS Package Number WG10A
Ceramic SOIC (WG)
JAN Part Number
5962–8759402VYA
5962–8759406VXA
5962–8759402XA
5962–8759402YA
5962–8759406XA
DS201562
20156203
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.
Features
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
NS Package Number
WG10A
WG10A
H02A
H02A
H02A
H02A
H02A
See NS Package Number H02A
TO-46 Metal Can Package (H)
Bottom View
Package Description
2LD, T0–46 Metal Can
2LD, T0–46 Metal Can
10LD Ceramic SOIC
10LD Ceramic SOIC
2LD, T0–46 Metal Can
2LD, T0–46 Metal Can
2LD, T0–46 Metal Can
20156213
November 2005
www.national.com

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LM185BYH2.5-SMD Summary of contents

Page 1

... LM185H-2.5-SMD 5962–8759402XA LM185H-2.5/883 LM185WG-2.5-QV 5962–8759402VYA LM185WG-2.5/883 5962–8759402YA LM185BYH2.5/883 LM185BYH2.5-SMD 5962–8759406XA LM185BYH2.5-QV 5962–8759406VXA Connection Diagrams Ceramic SOIC (WG) See NS Package Number WG10A © 2005 National Semiconductor Corporation The extremely low power drain of the LM185-2.5 makes it useful for micropower circuitry ...

Page 2

Schematic Diagram www.national.com 20156201 2 ...

Page 3

Absolute Maximum Ratings Reverse Current Forward Current Operating Temperature Range Storage Temperature Maximum Junction Temperature (T Jmax Lead Temperature (Soldering, 10 sec) TO-46 Metal Can Ceramic SOIC Thermal Resistance θ JA T0–46 Metal Can (Still Air) T0–46 Metal Can (500LF ...

Page 4

LM185–2.5 Electrical Characteristics DC Parameters Symbol Parameter V Reverse Breakdown Voltage Ref ∆V / ∆I Reverse Breakdown Voltage Ref R Change with Current V Forward Bias Voltage F DC Drift Parameters Delta calculations performed on QMLV devices at group B ...

Page 5

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the ...

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Typical Performance Characteristics Reverse Dynamic Impedance Noise Voltage Response Time www.national.com (Continued) 20156219 Filtered Output Noise 20156221 20156223 6 Reverse Dynamic Impedance 20156220 20156222 ...

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Applications Micropower 5V Reference (Note µA Note Wide Input Range Reference 20156212 Micropower Reference from 9V Battery 20156202 Micropower 10V Reference (Note µA standby current Note 20156209 7 ...

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Applications (Continued) Precision 1 µ Current Sources METER THERMOMETERS 0˚C–100˚C Thermometer Calibration 1. Short LM385-2.5, adjust R3 for I 2. Remove short, adjust R2 for correct reading in centigrade www.national.com 20156224 20156226 Calibration =temp at 1µA/˚K 1. ...

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Applications (Continued) Improving Regulation of Adjustable Regulators Micropower Thermocouple Cold Junction Compensator Adjustment Procedure 1. Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature multiplied by the thermocouple Seebeck coefficient. 2. Adjust zero ADJ pot until voltage across ...

Page 10

Revision History Section Released Revision 11/08/05 A New Release, Corporate format www.national.com Section Originator L. Lytle 2 MDS data sheets converted into one Corp. data sheet format. MNLM185-2.5-X Rev 2A2 and MNLM185-2.5BY-X Rev 1B1 will be archived. 10 Changes ...

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Physical Dimensions inches (millimeters) unless otherwise noted Ceramic SOIC Package (WG) NS Package Number WG10A TO-46 Metal Can Package (H) NS Package Number H02A 11 www.national.com ...

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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information ...

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