NSC LM185BH/883

LM185QML
Adjustable Micropower Voltage References
General Description
The LM185 are micropower 3-terminal adjustable band-gap
voltage reference diodes. Operating from 1.24 to 5.3V and
over a 10µA to 20mA 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 band-gap reference uses only transistors
and resistors, low noise and good long-term stability result.
Careful design of the LM185 has made the device 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 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
n
n
n
Adjustable from 1.24V to 5.30V
Operating current of 10µA to 20mA
1Ω dynamic impedance
Low temperature coefficient
Ordering Information
NS Part Number
SMD Part Number
NS Package Number
Package Description
LM185BE/883
E20A
20LD Leadless Chip Carrier
LM185BH/883
H03H
3LD; T0–46 Metal Can
LM185BYH/883
H03H
3LD; T0–46 Metal Can
LM185BYH-SMD
5962–9091401MXA
H03H
LM185BWG/883
5962–9091402QYA
WG10A
3LD; T0–46 Metal Can
10LD Ceramic SOIC
Connection Diagrams
TO-46
Metal Can Package
20156301
Bottom View
© 2006 National Semiconductor Corporation
DS201563
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LM185QML Adjustable Micropower Voltage Reference
April 2006
LM185QML
Connection Diagrams
(Continued)
20-Leadless Chip Carrier
20156315
Top View
10-Lead Ceramic SOIC
20156303
Top View
Block Diagram
20156313
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2
LM185QML
Schematic Diagram
20156308
3
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LM185QML
Absolute Maximum Ratings (Note 1)
Reverse Current
30mA
Forward Current
10mA
Operating Temperature Range
−55˚C ≤ TA ≤ 125˚C
Storage Temperature
−55˚C ≤ TA ≤ 150˚C
Maximum Junction Temperature TJmax
150˚C
Lead Temperature (soldering, 10 seconds)
300˚C
Thermal Resistance
θJA
LCC Package (Still Air)
100˚C/W
LCC Package (500LF/Min Air flow)
73˚C/W
Metal Can Package (Still Air)
300˚C/W
Metal Can Package (500LF/Min Air flow)
139˚C/W
Ceramic SOIC Package (Still Air)
194˚C/W
Ceramic SOIC Package (500LF/Min Air flow)
128˚C/W
θJC
LCC Package
25˚C/W
Metal Can Package
57˚C/W
Ceramic SOIC Package
23˚C/W
Package Weight (Typical)
LCC Package
TBD
Metal Can Package
TBD
Ceramic SOIC Package
210mg
ESD Tolerance (Note 2)
500V
Quality Conformance Inspection
Mil-Std-883, Method 5005 - Group A
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Subgroup
Description
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
12
Settling time at
25
13
Settling time at
125
14
Settling time at
-55
4
Temp ˚C
Symbol
VRef
Parameter
Reference Voltage
Conditions
Notes
IR = 100µA
Unit
Subgroups
V
1
1.215 1.255
V
2, 3
IR = 9µA
1.228 1.252
V
1
IR = 10µA
1.215 1.255
V
2, 3
IR = 1mA
1.228 1.252
V
1
1.215 1.255
V
2, 3
1.228 1.252
V
1
1.215 1.255
V
2, 3
1.228 1.252
V
1
1.215 1.255
V
2, 3
VR = 5.3V, IR = 45µA
1.288 1.252
V
1
VR = 5.3V, IR = 50µA
1.215 1.255
V
2, 3
VR = 5.3V, IR = 100µA
VR = 5.3V, IR = 1.0mA
VR = 5.3V, IR = 20mA
1.288 1.252
V
1
1.215 1.255
V
2, 3
1.288 1.252
V
1
1.215 1.255
V
2, 3
mV
1
2, 3
Reference Voltage Change with 9µA ≤ IR ≤ 1mA
Current
10µA ≤ IR ≤ 1mA
1.0
1.5
mV
1mA ≤ IR ≤ 20mA
10
mV
1
20
mV
2, 3
VR = 5.3V, 45µA ≤ IR ≤ 1mA
1.0
mV
1
VR = 5.3V, 50µA ≤ IR ≤ 1mA
1.5
mV
2, 3
VR = 5.3V, 1mA ≤ IR ≤ 20mA
10
mV
1
20
mV
2, 3
∆VRef /
∆VO
Reference Voltage Change with VR = 5.3V, IR = 100µA
Output Voltage
IF
Feedback Current
IC
Max
1.228 1.252
IR = 20mA
∆VRef/∆IR
Min
Minimum Operating Current
3.0
mV
1
6.0
mV
2, 3
IR = 9µA
20
nA
1
IR = 10µA
25
nA
2, 3
IR = 20mA
20
nA
1
25
nA
2, 3
VR = 5.3V, IR = 45µA
20
nA
1
VR = 5.3V, IR = 50µA
25
nA
2, 3
VR = 5.3V, IR = 20mA
20
nA
1
25
nA
2, 3
VR = VRef
VR = 5.3V
5
(Note 3)
9.0
µA
1
(Note 3)
10
µA
2, 3
(Note 3)
45
µA
1
(Note 3)
50
µA
2, 3
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LM185QML
LM185B Electrical Characteristics
DC Parameters
LM185QML
LM185BY Electrical Characteristics
DC Parameters
Symbol
VRef
Parameter
Reference Voltage
Conditions
Notes
IR = 100µA
Max
Unit
Subgroups
1.228 1.252
V
1
1.215 1.255
V
2, 3
IR = 9µA
1.228 1.252
V
1
IR = 10µA
1.215 1.255
V
2, 3
IR = 1mA
1.228 1.252
V
1
1.215 1.255
V
2, 3
1.228 1.252
V
1
1.215 1.255
V
2, 3
1.228 1.252
V
1
1.215 1.255
V
2, 3
VR = 5.3V, IR = 45µA
1.288 1.252
V
1
VR = 5.3V, IR = 50µA
1.215 1.255
V
2, 3
IR = 20mA
VR = 5.3V, IR = 100µA
VR = 5.3V, IR = 1.0mA
VR = 5.3V, IR = 20mA
∆VRef/∆IR
Min
1.288 1.252
V
1
1.215 1.255
V
2, 3
1.288 1.252
V
1
1.215 1.255
V
2, 3
mV
1
2, 3
Reference Voltage Change with 9µA ≤ IR ≤ 1mA
Current
10µA ≤ IR ≤ 1mA
1.0
1.5
mV
1mA ≤ IR ≤ 20mA
10
mV
1
20
mV
2, 3
VR = 5.3V, 45µA ≤ IR ≤ 1mA
1.0
mV
1
VR = 5.3V, 50µA ≤ IR ≤ 1mA
1.5
mV
2, 3
VR = 5.3V, 1mA ≤ IR ≤ 20mA
10
mV
1
20
mV
2, 3
∆VRef /
∆VO
Reference Voltage Change with VR = 5.3V, IR = 100µA
Output Voltage
3.0
mV
1
6.0
mV
2, 3
IF
Feedback Current
IR = 9µA
20
nA
1
IR = 10µA
25
nA
2, 3
IR = 20mA
IC
Minimum Operating Current
20
nA
1
25
nA
2, 3
VR = 5.3V, IR = 45µA
20
nA
1
VR = 5.3V, IR = 50µA
25
nA
2, 3
VR = 5.3V, IR = 20mA
20
nA
1
25
nA
2, 3
VR = VRef
VR = 5.3V
TC
Temperature Coefficient
(Note 3)
9.0
µA
1
(Note 3)
10
µA
2, 3
(Note 3)
45
µA
1
(Note 3)
50
µA
2, 3
PPM/˚C
1, 2, 3
(Note 4)
50
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.
Note 2: Human body model, 1.5 kΩ in series with 100 pF.
Note 3: Functional test.
Note 4: The average temperature coefficient is defined as the maximum deviation of reference voltage, at all measured temperatures between the operating TMin
& TMax, divided by (TMax − TMin). The measured temperatures (TMeasured) are −55˚C, 25˚C, & 125˚C or ∆VRef / (TMax − TMin)
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LM185QML
Typical Performance Characteristics
Temperature Drift of 3
Representative Units
Feedback Current
20156317
20156316
Minimum Operating Current
Reverse Characteristics
20156318
20156319
Reverse Characteristics
Forward Characteristics
20156320
20156321
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LM185QML
Typical Performance Characteristics
(Continued)
Output Noise Voltage
Dynamic Output Impedance
20156323
20156322
Response Time
20156324
Temperature Coefficient Typical
LM185
20156304
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LM185QML
Typical Applications
Precision 10V Reference
Low AC Noise Reference
20156325
20156326
25V Low Current Shunt Regulator
200 mA Shunt Regulator
20156327
20156328
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LM185QML
Typical Applications
(Continued)
Series-Shunt 20 mA Regulator
High Efficiency Low Power Regulator
20156329
20156330
Voltage Level Detector
Voltage Level Detector
20156331
20156332
Fast Positive Clamp
2.4V + ∆VD1
Bidirectional Clamp
± 2.4V
20156334
20156333
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LM185QML
Typical Applications
(Continued)
Bidirectional Adjustable Clamp
± 1.8V to ± 2.4V
Bidirectional Adjustable Clamp
± 2.4V to ± 6V
20156336
20156335
Simple Floating Current Detector
Current Source
20156338
20156337
11
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LM185QML
Typical Applications
(Continued)
Precision Floating Current Detector
20156339
*D1 can be any LED, VF=1.5V to 2.2V at 3 mA. D1 may act as an indicator. D1 will be on if ITHRESHOLD falls below the threshold current, except with I=O.
Centigrade Thermometer, 10mV/˚C
Freezer Alarm
20156312
20156311
1.2V Reference
5.0V Reference
20156314
20156302
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Released
Revision
Section
Originator
Changes
11/08/05
A
New Release, Corporate format
L. Lytle
2 MDS data sheets converted into one Corp.
data sheet format. MNLM185B-X Rev 0B0
and MNLM185BY-X Rev 0B0 will be
archived.
04/06/06
B
Ordering Information Table, WG
Connection Diagram, Absolute
Maximum Ratings Section, Physical
Dimensions Section
R. Malone
Added NSID, Connection Diagram, Physical
Dimension Dwg, Thermal Resistance and
Package Weight for WG package. Revision
A will be Archived.
13
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LM185QML
Revision History Section
LM185QML
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Leadless Chip Carrier (E)
NS Package Number E20A
TO-46 Metal Can Package (H)
NS Package Number H03H
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14
LM185QML Adjustable Micropower Voltage Reference
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
Ceramic SOIC Package (WG)
NS Package Number WG10A
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 visit us at www.national.com.
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(b) support or sustain life, and whose failure to perform when
properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to result
in a significant injury to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
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