LM185-ADJ, LM285-ADJ, LM385-ADJ
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
LM185/LM285/LM385 Adjustable Micropower Voltage References
Check for Samples: LM185-ADJ, LM285-ADJ, LM385-ADJ
FEATURES
1
•
•
•
•
•
2
Adjustable from 1.24V to 5.30V
Operating Current of 10μA to 20mA
1% and 2% Initial Tolerance
1Ω Dynamic Impedance
Low Temperature Coefficient
DESCRIPTION
The LM185/LM285/LM385 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.
The LM185 is rated for operation over a −55°C to
125°C temperature range, while the LM285 is rated
−40°C to 85°C and the LM385 0°C to 70°C. The
LM185 is available in a hermetic TO package and a
LCCC package, while the LM285/LM385 are
available in a low-cost TO-92 package, as well as
SOIC.
Connection Diagram
Figure 1. TO-92 Package
Bottom View
Figure 2. TO Package
Bottom View
Figure 3. SOIC Package
Top View
Figure 4. 20-LCCC
Top View
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2013, Texas Instruments Incorporated
LM185-ADJ, LM285-ADJ, LM385-ADJ
SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
www.ti.com
Block Diagram
Typical Applications
Figure 5. 1.2V Reference
Figure 6. 5.0V Reference
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
Absolute Maximum Ratings (1) (2) (3)
Reverse Current
30mA
Forward Current
10mA
Operating Temperature Range
(4)
LM185 Series
−55°C to 125°C
LM285 Series
−40°C to 85°C
LM385 Series
0°C to 70°C
(5)
2kV
Storage Temperature
−55°C to 150°C
ESD Susceptibility
Soldering Information
TO-92 Package (10 sec.)
260°C
TO Package (10 sec.)
300°C
SOIC Package
Vapor Phase (60 sec.)
215°C
Infrared (15 sec.)
220°C
See An-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount devices.
(1)
(2)
(3)
(4)
(5)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics. The specifications
apply only for the test conditions listed.
Refer to RETS185H for military specifications.
If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications.
For elevated temperature operation, see Table 1 and Thermal Characteristics.
The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Table 1. TJ(max) for Elevated Temperature Operation
DEVICE
TJ(max) (°C)
LM185
150
LM285
125
LM385
100
Thermal Characteristics
Over operating free-air temperature range (unless otherwise noted)
Thermal Resistance
TO-92
180°C/W (0.4″ leads)
θJA (Junction to Ambient)
170°C/W (0.125″ leads)
θJC (Junction to Case)
N/A
Copyright © 2000–2013, Texas Instruments Incorporated
TO-46
SOIC
440°C/W
165°C/W
80°C/W
N/A
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LM185-ADJ, LM285-ADJ, LM385-ADJ
SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
www.ti.com
Electrical Characteristics (1)
LM185, LM285
Parameter
Conditions
Typ
LM385
LM185BX,
LM185BY
LM185B,
LM285BX,
LM285BY
LM285
LM385
LM385BX,
LM385BY
Tested Design Tested Design
Limit
Limit
Limit
Limit
(2)
Reference
Voltage
IR = 100μA
1.240
(3)
1.252
Units
(Limit)
Typ
(2)
(3)
1.265
1.270
1.215
1.205
Tested Design Tested Design
Limit
Limit
Limit
Limit
1.240
(2)
(3)
(2)
(3)
1.252
1.255
1.265
1.270
V (max)
1.228
1.215
1.215
1.205
V (min)
mV
(max)
1.255
1.228
1.215
Reference
Voltage
Change with
Current
IMIN< IR < 1mA
Dynamic
Output
Impedance
IR = 100μA, f =
100Hz
Reference
Voltage
Change with
Output
Voltage
1mA < IR < 20mA
IAC = 0.1 IR
0.2
1
1.5
1
1.5
0.2
1
1.5
1
1.5
4
10
20
10
20
5
15
25
15
25
VOUT =
VREF
0.3
0.4
VOUT =
5.3V
0.7
1
Ω
IR = 100μA
Feedback
Current
1
3
6
3
6
2
5
10
5
10
mV
(max)
13
20
25
20
25
16
30
35
30
35
nA (max)
μA
(max)
Minimum
Operating
Current (see
curve)
VOUT = VREF
6
9
10
9
10
7
11
13
11
13
VOUT = 5.3V
30
45
50
45
50
35
55
60
55
60
Output
Wideband
Noise
IR = 100μA, 10Hz < f
< 10kHz
VOUT = VREF
50
VOUT = 5.3V
Average
IR = 100μA
Temperature
Coefficient
(4)
μVrms
170
170
X Suffix
30
30
Y Suffix
50
50
All
Others
Long Term
Stability
50
IR = 100μA, T = 1000
Hr,
150
20
150
150
20
150
ppm/°c
(max)
ppm
TA = 25°C ± 0.1°C
(1)
(2)
(3)
(4)
4
Parameters identified with boldface type apply at temperature extremes. All other numbers apply at TA = TJ = 25°C. Unless otherwise
specified, all parameters apply for VREF < VOUT < 5.3V.
Production tested.
Not production tested. These limits are not to be used to calculate average outgoing quality levels.
The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures from TMIN
to TMAX, divided by TMAX − TMIN. The measured temperatures are −55, −40, 0, 25, 70, 85, 125°C.
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
Typical Performance Characteristics
Temperature Drift of 3
Representative Units
Feedback Current
Figure 7.
Figure 8.
Minimum Operating Current
Reverse Characteristics
Figure 9.
Figure 10.
Reverse Characteristics
Forward Characteristics
Figure 11.
Figure 12.
Copyright © 2000–2013, Texas Instruments Incorporated
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
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Typical Performance Characteristics (continued)
Output Noise Voltage
Dynamic Output Impedance
Figure 13.
Figure 14.
Response Time
Figure 15.
Temperature Coefficient Typical
LM185 (left),
LM285 (center),
LM385 (right)
Figure 16.
6
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
TYPICAL APPLICATIONS
Figure 17. Precision 10V Reference
Figure 18. Low AC Noise Reference
Figure 19. 25V Low Current Shunt Regulator
Figure 20. 200 mA Shunt Regulator
Copyright © 2000–2013, Texas Instruments Incorporated
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
8
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Figure 21. Series-Shunt 20 mA Regulator
Figure 22. High Efficiency Low Power Regulator
Figure 23. Voltage Level Detector
Figure 24. Voltage Level Detector
Figure 25. Fast Positive Clamp
2.4V + ΔVD1
Figure 26. Bidirectional Clamp
±2.4V
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
Figure 27. Bidirectional Adjustable Clamp
±1.8V to ±2.4V
Figure 28. Bidirectional Adjustable Clamp
±2.4V to ±6V
Figure 29. Simple Floating Current Detector
Figure 30. Current Source
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LM185-ADJ, LM285-ADJ, LM385-ADJ
SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
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*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.
Figure 31. Precision Floating Current Detector
Figure 32. Centigrade Thermometer, 10mV/°C
Figure 33. Freezer Alarm
10
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SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
Schematic Diagram
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LM185-ADJ, LM285-ADJ, LM385-ADJ
SNVS741F – FEBRUARY 2000 – REVISED APRIL 2013
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REVISION HISTORY
Changes from Revision E (April 2013) to Revision F
•
12
Page
Changed layout of National Data Sheet to TI format .......................................................................................................... 11
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PACKAGE OPTION ADDENDUM
www.ti.com
4-Aug-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
LM185BH
ACTIVE
TO
NDV
3
1000
Non-RoHS &
Non-Green
Call TI
Call TI
-55 to 125
( LM185BH, LM185BH
)
Samples
LM185BH/NOPB
ACTIVE
TO
NDV
3
1000
RoHS & Green
Call TI
Level-1-NA-UNLIM
-55 to 125
( LM185BH, LM185BH
)
Samples
LM285BXZ/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
-40 to 85
LM285
BXZ
Samples
LM285BYM/NOPB
ACTIVE
SOIC
D
8
95
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
LM285
BYM
Samples
LM285BYMX/NOPB
ACTIVE
SOIC
D
8
2500
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
LM285
BYM
Samples
LM285BYZ/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
-40 to 85
LM285
BYZ
Samples
LM285M/NOPB
ACTIVE
SOIC
D
8
95
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
LM285
M
Samples
LM285MX/NOPB
ACTIVE
SOIC
D
8
2500
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
LM285
M
Samples
LM285Z/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
-40 to 85
LM285
Z
Samples
LM385BM/NOPB
ACTIVE
SOIC
D
8
95
RoHS & Green
SN
Level-1-260C-UNLIM
0 to 70
LM385
BM
Samples
LM385BMX/NOPB
ACTIVE
SOIC
D
8
2500
RoHS & Green
SN
Level-1-260C-UNLIM
0 to 70
LM385
BM
Samples
LM385BXZ/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
0 to 70
LM385
BXZ
Samples
LM385BYZ/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
0 to 70
LM385
BYZ
Samples
LM385BZ/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
0 to 70
LM385
BZ
Samples
LM385M
NRND
SOIC
D
8
95
Non-RoHS
& Green
Call TI
Level-1-235C-UNLIM
0 to 70
LM385
M
LM385M/NOPB
ACTIVE
SOIC
D
8
95
RoHS & Green
SN
Level-1-260C-UNLIM
0 to 70
LM385
M
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
4-Aug-2022
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
LM385MX
NRND
SOIC
D
8
2500
Non-RoHS
& Green
Call TI
Level-1-235C-UNLIM
0 to 70
LM385
M
LM385MX/NOPB
ACTIVE
SOIC
D
8
2500
RoHS & Green
SN
Level-1-260C-UNLIM
0 to 70
LM385
M
Samples
LM385Z/NOPB
ACTIVE
TO-92
LP
3
1800
RoHS & Green
Call TI
N / A for Pkg Type
0 to 70
LM385
Z
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of