LM285DR-1-2 [TI]
MICROPOWER VOLTAGE REFERENCES; 微功耗电压基准型号: | LM285DR-1-2 |
厂家: | TEXAS INSTRUMENTS |
描述: | MICROPOWER VOLTAGE REFERENCES |
文件: | 总15页 (文件大小:306K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ꢀ ꢁꢂ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁꢉ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁ ꢉꢃ ꢄꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋꢌꢍꢎ ꢏ ꢎꢐ ꢑꢍ ꢒꢎ ꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗ ꢌꢑ ꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
LM285-1.2 . . . D PACKAGE
D
Operating Current Range
LM385-1.2 . . . D, PS, OR PW PACKAGE
LM385B-1.2 . . . D OR PW PACKAGE
(TOP VIEW)
− LM285 . . . 10 µA to 20 mA
− LM385 . . . 15 µA to 20 mA
− LM385B . . . 15 µA to 20 mA
NC
NC
NC
CATHODE
NC
NC
1
2
3
4
8
7
6
5
D
D
1% and 2% Initial Voltage Tolerance
Reference Impedance
− LM385 . . . 1 Ω Max at 25°C
− All Devices . . . 1.5 Ω Max Over Full
Temperature Range
ANODE
NC
NC − No internal connection
D
D
Very Low Power Consumption
LM285-1.2, LM385-1.2, LM385B-1.2 . . . LP PACKAGE
(TOP VIEW)
Applications
− Portable Meter References
− Portable Test Instruments
− Battery-Operated Systems
− Current-Loop Instrumentation
− Panel Meters
ANODE
CATHODE
NC
D
Interchangeable With Industry Standard
LM285-1.2 and LM385-1.2
NC − No internal connection
description/ordering information
These micropower, two-terminal, band-gap voltage references operate over a 10-µA to 20-mA current range
and feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming provides
tight voltage tolerance. The band-gap reference for these devices has low noise and long-term stability.
ORDERING INFORMATION
V
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
Z
†
T
A
PACKAGE
TOLERANCE
Tube of 75
LM385D-1-2
SOIC (D)
SOP (PS)
385-12
Reel of 2000
Reel of 2000
Tube of 1000
Reel of 2000
Tube of 150
Reel of 2000
Tube of 75
LM385DR-1-2
LM385PSR-1-2
LM385LP-1-2
LM385LPR-1-2
LM385PW-1-2
LM385PWR-1-2
LM385BD-1-2
LM385BDR-1-2
LM385BLP-1-2
LM385BLPR-1-2
LM385BPW-1-2
LM385BPWR-1-2
LM285D-1-2
L385-12
2%
TO-226 / TO-92 (LP)
TSSOP (PW)
SOIC (D)
385-12
385-12
385B12
385-12
385B12
0°C to 70°C
Reel of 2000
Tube of 1000
Reel of 2000
Tube of 150
Reel of 2000
Tube of 75
1%
1%
TO-226 / TO-92 (LP)
TSSOP (PW)
SOIC (D)
285-12
285-12
−40°C to 85°C
Reel of 2000
LM285DR-1-2
LM285LP-1-2
TO-226 / TO-92 (LP) Tube of 1000
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available
at www.ti.com/sc/package.
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.
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Copyright 2005, Texas Instruments Incorporated
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢂ ꢈ ꢀ ꢁ ꢉ ꢃꢄ ꢅꢆ ꢇ ꢂ ꢈ ꢀꢁ ꢉ ꢃꢄ ꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋ ꢌꢍ ꢎꢏꢎꢐꢑ ꢍ ꢒ ꢎꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗꢌ ꢑꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
description/ordering information (continued)
The design makes these devices exceptionally tolerant of capacitive loading and, thus, easier to use in most
reference applications. The wide dynamic operating temperature range accommodates varying current
supplies, with excellent regulation.
The extremely low power drain of this series makes them useful for micropower circuitry. These voltage
references can be used to make portable meters, regulators, or general-purpose analog circuitry, with battery
life approaching shelf life. The wide operating current range allows them to replace older references with
tighter-tolerance parts.
symbol
ANODE
CATHODE
schematic
CATHODE
Q13
7.5 kΩ
600 kΩ
Q12
Q11
Q7
200 kΩ
50 kΩ
Q4
Q3
Q10
Q9
Q1
300 kΩ
20 pF
20 pF
Q2
Q5
Q6
Q8
Q14
100 kΩ
500 Ω
60 kΩ
ANODE
NOTE A: Component values shown are nominal.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁꢂ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁꢉ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁ ꢉꢃ ꢄꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋꢌꢍꢎ ꢏ ꢎꢐ ꢑꢍ ꢒꢎ ꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗ ꢌꢑ ꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Reverse current, I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
R
Forward current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
F
Package thermal impedance, θ (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
JA
LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 140°C/W
PS package . . . . . . . . . . . . . . . . . . . . . . . . . . . 95°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W
Operating virtual junction temperature, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
J
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Maximum power dissipation is a function of T
,θ , and T . The maximum allowable power dissipation at any allowable ambient
A
J(max) JA
temperature is P = (T
J(max)
− T )/θ . Operation at the absolute maximum T of 150°C can affect reliability.
A JA J
D
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
0.01
−40
0
MAX
20
UNIT
I
Reference current
mA
Z
LM285-1.2
LM385-1.2, LM385B-1.2
85
T
Operating free-air temperature range
°C
A
70
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢂ ꢈ ꢀ ꢁ ꢉ ꢃꢄ ꢅꢆ ꢇ ꢂ ꢈ ꢀꢁ ꢉ ꢃꢄ ꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋ ꢌꢍ ꢎꢏꢎꢐꢑ ꢍ ꢒ ꢎꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗꢌ ꢑꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
electrical characteristics at specified free-air temperature
LM285-1.2
TYP
LM385-1.2
TYP
LM385B-1.2
MIN TYP MAX
TEST
CONDITIONS
†
PARAMETER
T
A
UNIT
MIN
MAX
MIN
MAX
Reference
voltage
I
= I(min)
‡
Z
V
Z
25°C
1.223 1.235 1.247
1.21 1.235
1.26 1.223 1.235 1.247
V
to 20 mA
Average
temperature
coefficient of
reference
I
= I(min)
Z
α
VZ
Full range
20
20
20
ppm/°C
‡
to 20 mA
§
voltage
25°C
Full range
25°C
1
1.5
12
1
1.5
20
1
1.5
20
I
= I(min)
Z
Change in
reference
voltage with
current
‡
to 1 mA
∆V
mV
Z
I
Z
= 1 mA
to 20 mA
Full range
30
30
30
Long-term
change in
reference
voltage
∆V /∆t
I
Z
= 100 µA
25°C
20
20
20
ppm/khr
Z
Minimum
I (min) reference
Z
Full range
8
10
8
15
8
15
µA
current
25°C
0.2
0.6
1.5
0.4
1
0.4
1
Reference
impedance
I
= 100 µA,
Z
z
Ω
z
f = 25 Hz
= 100 µA,
Full range
1.5
1.5
I
Z
Broadband
noise voltage
V
f = 10 Hz to
10 kHz
25°C
60
60
60
µV
n
†
‡
§
Full range is −40°C to 85°C for the LM285-1.2 and 0°C to 70°C for the LM385-1.2 and LM385B-1.2.
I(min) = 10 µA for the LM285-1.2 and 15 µA for the LM385-1.2 and LM385B-1.2
The average temperature coefficient of reference voltage is defined as the total change in reference voltage divided by the specified temperature
range.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁꢂ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁꢉ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁ ꢉꢃ ꢄꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋꢌꢍꢎ ꢏ ꢎꢐ ꢑꢍ ꢒꢎ ꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗ ꢌꢑ ꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
†
TYPICAL CHARACTERISTICS
REFERENCE VOLTAGE CHANGE
REVERSE CURRENT
vs
REVERSE VOLTAGE
vs
REVERSE CURRENT
16
12
8
100
10
1
T
A
= −55°C to 125°C
T
A
= −55°C to 125°C
4
0
0.1
0
−4
0.01
0.1
1
10
100
0.2
0.4
V
0.6
0.8
1
1.2
1.4
I
R
− Reverse Current − mA
− Reverse Voltage − V
R
Figure 1
Figure 2
REFERENCE VOLTAGE
vs
FORWARD VOLTAGE
vs
FREE-AIR TEMPERATURE
FORWARD CURRENT
1.2
0.8
0.4
0
1.245
1.24
T
A
= 25°C
1.235
1.23
1.225
1.220
−55 −35 −15
5
25
45
65 85 105 125
0.01
0.1
1
10
100
T
A
− Free-Air Temperature − °C
I
F
− Forward Current − mA
Figure 3
Figure 4
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢂ ꢈ ꢀ ꢁ ꢉ ꢃꢄ ꢅꢆ ꢇ ꢂ ꢈ ꢀꢁ ꢉ ꢃꢄ ꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋ ꢌꢍ ꢎꢏꢎꢐꢑ ꢍ ꢒ ꢎꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗꢌ ꢑꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
†
TYPICAL CHARACTERISTICS
NOISE VOLTAGE
vs
FREQUENCY
REFERENCE IMPEDANCE
vs
REFERENCE CURRENT
700
600
500
400
300
200
100
0
100
10
1
f = 25 Hz
I
= 100 µA
= 25°C
Z
T
= −55°C to 125°C
A
T
A
0.1
0.01
10
100
1 k
10 k
100 k
0.1
1
10
100
f − Frequency − Hz
I
Z
− Reference Current − mA
Figure 6
Figure 5
OUTPUT NOISE VOLTAGE
vs
CUTOFF FREQUENCY
TRANSIENT RESPONSE
70
I
T
= 100 µA
Z
RC Low Pass
= 25°C
Output
60
50
40
30
20
A
1.5
1
36 kΩ
100 µA
V
I
V
O
R
0.5
C
0
5
0
10
0
Input
0
100
500
600
0.1
1
10
100
t − Time − µs
f − Cutoff Frequency − kHz
Figure 7
Figure 8
†
6
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁꢂ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁꢉ ꢃ ꢄ ꢅꢆ ꢇ ꢂꢈ ꢀ ꢁ ꢉꢃ ꢄꢊ ꢅꢆ ꢇꢂ
ꢁ ꢋꢌꢍꢎ ꢏ ꢎꢐ ꢑꢍ ꢒꢎ ꢀꢓꢔꢕ ꢑ ꢍꢑ ꢖꢑ ꢍꢑ ꢗ ꢌꢑ ꢘ
SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005
APPLICATION INFORMATION
I
O
≈ 58 µA
5.1 kΩ
+
−
V+
Mercury Cell
1.345 V
2.00 kΩ 1%
100 kΩ 1%
R
LM334
cw
cw
V−
10 kΩ
500 Ω
‡
412 Ω
1%
†
953 Ω
1%
LM385-1.2
+
Type K
−
Meter
†
‡
Adjust for 11.15 mV at 25°C across 953 Ω
Adjust for 12.17 mV at 25°C across 412 Ω
Figure 9. Thermocouple Cold-Junction Compensator
V+ 2.3 V ≤ V+ ≤ 30 V
LM334
V−
R
2.74 kΩ
1.2 V
LM385-1.2
Figure 10. Operation Over a Wide Supply Range
9 V
499 kΩ
1.2 V
LM385-1.2
Figure 11. Reference From a 9-V Battery
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
17-Feb-2005
PACKAGING INFORMATION
Orderable Device
LM285D-1-2
Status (1)
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
SOIC
D
8
75
Pb-Free
(RoHS)
CU NIPDAU Level-2-250C-1 YEAR
LM285DR-1-2
SOIC
D
8
2500
Pb-Free
(RoHS)
CU NIPDAU Level-2-250C-1 YEAR
LM285LP-1-2
LM385BD-1-2
ACTIVE
ACTIVE
TO-92
SOIC
LP
D
3
8
1000
75
None
Call TI
Level-NC-NC-NC
Pb-Free
(RoHS)
CU NIPDAU Level-2-250C-1 YEAR
LM385BDR-1-2
ACTIVE
SOIC
D
8
2500
Pb-Free
(RoHS)
CU NIPDAU Level-2-250C-1 YEAR
LM385BLP-1-2
LM385BLPR-1-2
LM385BPW-1-2
ACTIVE
ACTIVE
ACTIVE
TO-92
TO-92
TSSOP
LP
LP
3
3
8
1000
2000
150
None
None
Call TI
Call TI
Level-NC-NC-NC
Level-NC-NC-NC
PW
Pb-Free
(RoHS)
CU NIPDAU Level-1-250C-UNLIM
CU NIPDAU Level-1-250C-UNLIM
CU NIPDAU Level-2-250C-1 YEAR
CU NIPDAU Level-2-250C-1 YEAR
LM385BPWR-1-2
LM385D-1-2
ACTIVE
ACTIVE
ACTIVE
TSSOP
SOIC
PW
D
8
8
8
2000
75
Pb-Free
(RoHS)
Pb-Free
(RoHS)
LM385DR-1-2
SOIC
D
2500
Pb-Free
(RoHS)
LM385LP-1-2
LM385LPR-1-2
LM385PSR-1-2
ACTIVE
ACTIVE
ACTIVE
TO-92
TO-92
SO
LP
LP
PS
3
3
8
1000
2000
2000
None
None
Call TI
Call TI
Level-NC-NC-NC
Level-NC-NC-NC
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
LM385PW-1-2
ACTIVE
ACTIVE
TSSOP
TSSOP
PW
PW
8
8
150
Pb-Free
(RoHS)
CU NIPDAU Level-1-250C-UNLIM
LM385PWR-1-2
2000
Pb-Free
(RoHS)
CU NIPDAU Level-1-250C-UNLIM
(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)
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
17-Feb-2005
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 2
MECHANICAL DATA
MSOT002A – OCTOBER 1994 – REVISED NOVEMBER 2001
LP (O-PBCY-W3)
PLASTIC CYLINDRICAL PACKAGE
0.205 (5,21)
0.175 (4,44)
0.165 (4,19)
0.125 (3,17)
DIA
0.210 (5,34)
0.170 (4,32)
Seating
Plane
0.157 (4,00) MAX
0.050 (1,27)
C
0.500 (12,70) MIN
0.022 (0,56)
0.016 (0,41)
0.016 (0,41)
0.014 (0,35)
0.104 (2,65)
FORMED LEAD OPTION
STRAIGHT LEAD OPTION
D
0.135 (3,43) MIN
0.105 (2,67)
0.095 (2,41)
0.055 (1,40)
0.045 (1,14)
1
2
3
0.105 (2,67)
0.080 (2,03)
0.105 (2,67)
0.080 (2,03)
4040001-2/C 10/01
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Lead dimensions are not controlled within this area
D. FAlls within JEDEC TO -226 Variation AA (TO-226 replaces TO-92)
E. Shipping Method:
Straight lead option available in bulk pack only.
Formed lead option available in tape & reel or ammo pack.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MSOT002A – OCTOBER 1994 – REVISED NOVEMBER 2001
LP (O-PBCY-W3)
PLASTIC CYLINDRICAL PACKAGE
0.539 (13,70)
0.460 (11,70)
1.260 (32,00)
0.905 (23,00)
0.650 (16,50)
0.610 (15,50)
0.020 (0,50) MIN
0.098 (2,50)
0.384 (9,75)
0.335 (8,50)
0.748 (19,00)
0.217 (5,50)
0.748 (19,00)
0.689 (17,50)
0.433 (11,00)
0.335 (8,50)
0.114 (2,90)
0.094 (2,40)
0.114 (2,90)
0.094 (2,40)
0.169 (4,30)
0.146 (3,70)
DIA
0.266 (6,75)
0.234 (5,95)
0.512 (13,00)
0.488 (12,40)
TAPE & REEL
4040001-3/C 10/01
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Tape and Reel information for the Format Lead Option package.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999
PW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,30
0,19
M
0,10
0,65
14
8
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
0,25
1
7
0°–8°
A
0,75
0,50
Seating Plane
0,10
0,15
0,05
1,20 MAX
PINS **
8
14
16
20
24
28
DIM
3,10
2,90
5,10
4,90
5,10
4,90
6,60
6,40
7,90
9,80
9,60
A MAX
A MIN
7,70
4040064/F 01/97
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-153
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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