LM185BYH-1.2-SMD National Semiconductor Corporation, LM185BYH-1.2-SMD Datasheet

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LM185BYH-1.2-SMD

Manufacturer Part Number
LM185BYH-1.2-SMD
Description
V-ref Precision 1.235v 20ma 2-pin To-46 Tray
Manufacturer
National Semiconductor Corporation
Datasheet
© 2005 National Semiconductor Corporation
Ordering Information
LM185-1.2QML
Micropower Voltage Reference Diode
General Description
The LM185-1.2 is a micropower 2-terminal band-gap voltage
regulator diodes. Operating over a 10µA to 20mA current
range, it features exceptionally low dynamic impedance and
good temperature stability. On-chip trimming is used to pro-
vide tight voltage tolerance. Since the LM185-1.2 band-gap
reference uses only transistors 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.
Connection Diagrams
NS Part Number
LM185E-1.2/883
LM185H-1.2-SMD
LM185H-1.2-QV
LM185WG-1.2/883
LM185BYH-1.2-SMD
LM185WG-1.2-QV
Hermetic Leadless Chip Carrier (E)
See NS Package Number E20A
20156135
JAN Part Number
5962–87594012A
5962–8759401XA
5962–8759401VXA
5962–8759401YA
5962–8759405XA
5962–8759401VYA
DS201561
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.
Features
n Operating current of 10µA to 20mA
n 1Ω maximum dynamic impedance (typical)
n Low temperature coefficient
n Low voltage reference - 1.235V
NS Package Number
WG10A
WG10A
E20A
H02A
H02A
H02A
See NS Package Number H02A
Metal Can Package (H)
Bottom View
TO-46
Package Description
20LD LCC
2 LD T0–46
2 LD T0–46
10LD Ceramic SOIC
2 LD T0–46
10LD Ceramic SOIC
20156106
October 2005
www.national.com

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LM185BYH-1.2-SMD Summary of contents

Page 1

... JAN Part Number LM185E-1.2/883 5962–87594012A LM185H-1.2-SMD 5962–8759401XA LM185H-1.2-QV 5962–8759401VXA LM185WG-1.2/883 5962–8759401YA LM185BYH-1.2-SMD 5962–8759405XA LM185WG-1.2-QV 5962–8759401VYA Connection Diagrams Hermetic Leadless Chip Carrier (E) 20156135 See NS Package Number E20A © 2005 National Semiconductor Corporation The extremely low power drain of the LM185-1 ...

Page 2

Connection Diagrams Schematic Diagram www.national.com (Continued) Ceramic SOIC (WG) See NS Package Number WG10A 2 20156134 20156107 ...

Page 3

Absolute Maximum Ratings Reverse Current Forward Current Operating Temperature Range Maximum Junction Temperature (T Jmax Storage Temperature Lead Temperature (Soldering 10 Seconds) Ceramic SOIC TO-46 package 20LD LCC package Thermal Resistance θ JA Metal Can (Still Air) Metal Can (500LF ...

Page 4

LM185–1.2 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

Typical Performance Characteristics Reverse Characteristics Forward Characteristics Reverse Dynamic Impedance 20156113 20156115 Reverse Dynamic Impedance 20156117 5 Reverse Characteristics 20156114 Temperature Drift of 3 Representative Units 20156116 20156118 www.national.com ...

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Typical Performance Characteristics Noise Voltage Response Time Typical Applications Wide Input Range Reference 20156108 Micropower Reference from 9V Battery 20156122 www.national.com (Continued) 20156119 20156121 6 Filtered Output Noise 20156120 Reference from 1.5V Battery 20156123 ...

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Typical Applications (Continued) Micropower* 5V Regulator *I . 30µA Q Micropower* 10V Reference *I .20µA standby current Q Precision 1µA to 1mA Current Sources 20156124 20156125 7 20156126 20156127 www.national.com ...

Page 8

Typical Applications 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 Power ...

Page 9

Revision History Section Released Revision 10/07/05 A New Release, Corporate format Section Originator L. Lytle 9 Changes 2 MDS data sheets converted into one Corp. data sheet format. MNLM185-1.2-X Rev 2A3 and MNLM185BY-1.2-X Rev 0B0 data sheets will be archived. ...

Page 10

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted TO-46 Metal Can Package (H) NS Package Number H02A Leadless Chip Carrier Package (E) NS Package Number E20A 10 ...

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 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 ...

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