Original Creation Date: 08/15/95
Last Update Date: 05/17/99
Last Major Revision Date: 11/07/98
MNLM185-1.2-X REV 0A0 MICROCIRCUIT DATA SHEET
1.2V MICROPOWER VOLTAGE REFERENCE DIODE
General Description
The LM185-1.2 is a micropower 2-terminal band-gap voltage regulator diode. Operating over
a 10 uA to 20 mA current range, it features exceptionally 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 transistors and resistors, low noise and
good long term stability result.
Careful design of the LM185-1.2 has made the device exceptionally 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.
NS Part Numbers
LM185E-1.2/883
LM185H-1.2-SMD
LM185H-1.2/883
Industry Part Number
LM185
Prime Die
LM185
Controlling Document
SEE FEATURES SECTION
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description Temp ( C)
o
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
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MICROCIRCUIT DATA SHEET
MNLM185-1.2-X REV 0A0
Features
- Operating current of 10 uA to 20 uA
- 1.0 Ohms max dynamic impedance (Typical)
- Low temperature coefficient
- Low voltage reference-1.235V
- CONTROLLING DOCUMENT:
LM185E-1.2/883 5962-87594012A
LM185H-1.2-SMD 5962-8759401XA
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MICROCIRCUIT DATA SHEET
MNLM185-1.2-X REV 0A0
(Absolute Maximum Ratings)
(Note 1)
Reverse Current 30mA
Forward Current 10mA
Operating Temperature Range -55 C to +125 C
Maximum Junction Temperature 150 C
Storage Temperature -55 C to +150 C
Lead Temperature 300 C(Soldering, 10 seconds)
Thermal Resistance
ThetaJA 300 C/W H-Pkg (Still Air) 139 C/W (500LF/Min Air Flow) 100 C/W E-Pkg (Still Air) 73 C/W (500LF/Min Air Flow)
ThetaJC 57 C/W H-Pkg 25 C/W E-Pkg
Package Weight
(Typcial)
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 Electrical Characteristics. The guaranteed specifications apply
only for the test conditions listed. Some performance characteristics may degrade
when the device is not operated under the listed test conditions.
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MNLM185-1.2-X REV 0A0 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Vref Reverse Breakdown
Voltage Ir = 10uA 1.223 1.247 V 1
Ir = 20uA 1.205 1.26 V 2, 3
Ir = 1mA 1.223 1.247 V 1
1.205 1.26 V 2, 3
Ir = 20mA 1.223 1.247 V 1
1.205 1.26 V 2, 3
Delta
Vref/Delta
Ir
Reverse Breakdown
Voltage Change
with Current
10uA < Ir < 1mA -1.0 1.0 mV 1
20uA < Ir < 1mA -1.5 1.5 mV 2, 3
1mA < Ir < 20mA -10.0 10.0 mV 1
-20.0 20.0 mV 2, 3
Vf Forward Bias
Voltage If = 2mA -1.0 -0.4 V 1
Graphics and Diagrams
GRAPHICS# DESCRIPTION
05886HRB2 METAL CAN,TO-46,2LD,.100 DIA P.C. (H) (B/I CKT)
06175HRB2 LCC (E), TYPE C, 20 TERMINAL (B/I CKT)
E20ARE LCC (E), TYPE C, 20 TERMINAL(P/P DWG)
H02ARE METAL CAN,TO-46,2LD,.100 DIA P.C. (H)(P/P DWG)
P000329B LCC (E-1.2), 20 LEAD (PINOUT)
P000363A METAL CAN (H-1.2), TO-46, 2 LEAD (PINOUT)
See attached graphics following this page.
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N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
4 18
5
6
7
8 14
9 10 11 12 13
17
16
15
3 2 1 20 19
N/C
N/C
N/C
N/C GND- N/C N/C
N/C
N/C
N/C
N/C
N/CN/C
N/C
N/C
LM185E-1.2
20 - LEAD LCC
CONNECTION DIAGRAM
TOP VIEW
P000329B
N/C
N/C N/C
VREF+
N/C
N
MICROCIRCUIT DATA SHEET
MNLM185-1.2-X REV 0A0
Revision History
Rev ECN # Rel Date Originator Changes
0A0 M0003216 05/17/99 Rose Malone Archive RETS185X-1.2, Rev. 0A. Update MDS
MNLM185-X-1.2, Rev. 0AL to MNLM185-1.2-X, Rev. 0A0,
Fully Released MDS. Updated Discription, Features and
Absolute section. Changed nomenclature.
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