LM385-ADJMWC [NSC]
IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, UUC, WAFER, Voltage Reference;
| 型号： | LM385-ADJMWC |
| 厂家： | 
National Semiconductor |
| 描述： | IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, UUC, WAFER, Voltage Reference 输出元件 |
| 文件： | 总16页 (文件大小：350K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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February 2000
LM185/LM285/LM385
Adjustable Micropower Voltage References
The LM185 is rated for operation over a −55˚C to 125˚C tem-
perature 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-46 package and a leadless chip carrier package, while
the LM285/LM385 are available in a low-cost TO-92 molded
package, as well as S.O.
General Description
The LM185/LM285/LM385 are micropower 3-terminal ad-
justable 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 tem-
perature 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.
Features
n Adjustable from 1.24V to 5.30V
n Operating current of 10µA to 20mA
n 1% and 2% initial tolerance
n 1Ω dynamic impedance
n Low temperature coefficient
Careful design of the LM185 has made the device tolerant of
capacitive loading, making it easy to use in almost any refer-
ence 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 ana-
log circuitry with battery life approaching shelf life. Further,
the wide operating current allows it to replace older refer-
ences with a tighter tolerance part.
Connection Diagrams
SOIC Package
TO-92
Plastic Package
DS005250-9
Bottom View
DS005250-10
TO-46
Metal Can Package
Top View
20-Leadless Chip Carrier
DS005250-1
Bottom View
DS005250-15
Top View
© 2000 National Semiconductor Corporation
DS005250
www.national.com
Ordering Information
Package
Temperature Range
NSC
Drawing
−55˚C to 125˚C
−40˚C to 85˚C
0˚C to 70˚C
LM185BH
LM185BH/883
LM185BYH
TO-46
H03H
Z03A
LM185BYH/883
LM285BXZ
LM285BYZ
LM285Z
LM385BXZ
LM385BYZ
LM385BZ
LM385Z
TO-92
LM285M
LM385M
8-Pin SOIC
M08A
E20A
LM285BYM
LM385BM
20-Leadless Chip
Carrier
LM185BE/883
Block Diagram
DS005250-13
Typical Applications
1.2V Reference
5.0V Reference
DS005250-14
DS005250-2
www.national.com
2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature
Soldering Information
TO-92 Package (10 sec.)
TO-46 Package (10 sec.)
SO Package
−55˚C to 150˚C
260˚C
300˚C
(Note 2)
Vapor Phase (60 sec.)
Infrared (15 sec.)
215˚C
220˚C
Reverse Current
30mA
10mA
Forward Current
See An-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
Operating Temperature Range (Note 3)
LM185 Series
−55˚C to 125˚C
−40˚C to 85˚C
0˚C to 70˚C
LM285 Series
LM385 Series
Electrical Characteristics (Note 4)
LM185, LM285
LM185BX,
LM385
LM385BX,
LM185BY
LM185B,
LM285
LM385
LM385BY
Units
LM285BX,
Parameter
Conditions
Typ
Typ
LM285BY
(Limit)
Tested
Design
Limit
Tested
Design
Limit
Tested
Design
Limit
Tested
Design
Limit
Limit
(Note 5)
1.252
1.255
1.228
1.215
1
Limit
(Note 5)
1.265
Limit
(Note 5)
1.252
Limit
(Note 5)
1.265
(Note 6)
(Note 6)
1.270
(Note 6)
1.255
(Note 6)
1.270
Reference Voltage
I
I
= 100µA
1.240
1.240
V
R
(max)
V
1.215
1.205
1.228
1.215
1.215
1.205
(min)
mV
<
<
1mA
Reference Voltage
Change with Current
Dynamic Output
Impedance
I
0.2
4
1.5
20
1
1.5
20
0.2
5
1
1.5
25
1
1.5
25
MIN
R
<
<
20mA
1mA
I
10
10
15
15
(max)
R
I
I
= 100µA,
f = 100Hz
R
= 0.1 I
V
OUT
V
REF
=
0.3
0.7
0.4
1
AC
R
Ω
V
= 5.3V
OUT
Reference Voltage
Change with Output
Voltage
I
= 100µA
mV
R
1
3
6
3
6
2
5
10
35
5
10
35
(max)
Feedback Current
13
20
25
20
25
16
30
30
nA
(max)
Minimum Operating
Current (see curve)
Output Wideband
Noise
V
V
= V
6
9
10
50
9
10
50
7
11
55
13
60
11
55
13
60
µA
OUT
OUT
REF
= 5.3V
30
45
45
35
(max)
<
<
10kHz
I
= 100µA, 10Hz
f
R
V
V
= V
50
50
µV
rms
OUT
OUT
REF
= 5.3V
170
170
Average
I
= 100µA
X Suffix
30
50
30
50
ppm/˚c
(max)
R
Temperature
Coefficient (Note 7)
Y Suffix
All Others
150
150
150
150
Long Term Stability
I
= 100µA, T = 1000 Hr,
20
20
ppm
R
±
= 25˚C 0.1˚C
T
A
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be 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.
Note 2: Refer to RETS185H for military specifications.
Note 3: For elevated temperature operation, T max is:
J
LM185
150˚C
125˚C
100˚C
LM285
LM385
Thermal Resistance
TO-92
180˚C/W (0.4" leads)
170˚C/W (0.125" leads)
N/A
TO-46
SO-8
θ
θ
(Junction to Ambient)
440˚C/W
165˚C/W
JA
JC
(Junction to Case)
80˚C/W
N/A
3
www.national.com
Electrical Characteristics (Note 4) (Continued)
Note 4: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T = T = 25˚C. Unless otherwise specified, all param-
A
J
<
<
eters apply for V
V
5.3V.
REF
OUT
Note 5: Guaranteed and 100% production tested.
Note 6: Guaranteed, but not 100% production tested. These limits are not to be used to calculate average outgoing quality levels.
Note 7: The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures from T
to T
, divided by
MIN
MAX
T
MAX
− T
. The measured temperatures are −55, −40, 0, 25, 70, 85, 125˚C.
MIN
Typical Performance Characteristics
Temperature Drift of 3
Representative Units
Feedback Current
Minimum Operating Current
DS005250-17
DS005250-18
DS005250-16
Reverse Characteristics
Reverse Characteristics
Forward Characteristics
DS005250-19
DS005250-20
DS005250-21
Output Noise Voltage
Dynamic Output Impedance
Response Time
DS005250-23
DS005250-24
DS005250-22
www.national.com
4
Typical Performance Characteristics (Continued)
Temperature Coefficient Typical
LM185
LM285
LM385
DS005250-4
Typical Applications
Precision 10V Reference
Low AC Noise Reference
DS005250-25
DS005250-26
25V Low Current Shunt Regulator
200 mA Shunt Regulator
DS005250-27
DS005250-28
5
www.national.com
Typical Applications (Continued)
Series-Shunt 20 mA Regulator
High Efficiency Low Power Regulator
DS005250-29
DS005250-30
Voltage Level Detector
Voltage Level Detector
DS005250-31
DS005250-32
Fast Positive Clamp
Bidirectional Clamp
2.4V + ∆VD1
±
2.4V
DS005250-34
DS005250-33
www.national.com
6
Typical Applications (Continued)
Bidirectional Adjustable Clamp
Bidirectional Adjustable Clamp
±
±
1.8V to 2.4V
±
±
2.4V to 6V
DS005250-36
DS005250-35
Simple Floating Current Detector
Current Source
DS005250-38
DS005250-37
7
www.national.com
Typical Applications (Continued)
Precision Floating Current Detector
DS005250-39
*D1 can be any LED, V =1.5V to 2.2V at 3 mA. D1 may act as an indicator. D1 will be on if I
F
falls below the threshold current, except with I=O.
THRESHOLD
Centigrade Thermometer, 10mV/˚C
Freezer Alarm
DS005250-11
DS005250-12
www.national.com
8
Schematic Diagram
DS005250-8
9
www.national.com
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
www.national.com
10
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
SO Package (M)
NS Package Number M08A
TO-92 Plastic Package (Z)
NS Package Number Z03A
11
www.national.com
Notes
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (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.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: support@nsc.com
National Semiconductor
Europe
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
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Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
Fax: +49 (0) 180-530 85 86
Email: europe.support@nsc.com
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English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
Email: ap.support@nsc.com
www.national.com
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.
See Wireless Products
Products > Analog - References > Shunt Voltage References > LM385-ADJ
LM385-ADJ Product Folder
Adjustable Micropower Voltage Reference
Generic P/N 385-ADJ
General
Description
Package
& Models
Samples
& Pricing
Features
Datasheet
Parametric Table
Parametric Table
Input Voltage, max (Volt)
Output Current, max (Amp)
Reference Voltage
-
Initial Accuracy (+/-), max(%) (%)
Tempco, max (ppm/C) (ppm)
Operating Current, (mA) (mA)
-
.02
-
-
.01
Datasheet
Size in
Kbytes
Title
Date
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Aug-
00
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LM185 LM285 LM385 Adjustable Micropower Voltage
References
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LM185 LM285 LM385 Adjustable Micropower Voltage
References (JAPANESE)
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Package Availability, Models, Samples & Pricing
Budgetary
Pricing
Samples &
Electronic
Orders
Std
Pack
Size
Package
Type Pins MSL
Models
Package
Marking
Part Number
Status
SPICE IBIS
Qty $US each
24 Hour
rail
of
95
[logo]¢2¢T
LM385
BM
SOIC
NARROW
Full
production
MSL
LM385BM
8
N/A
N/A
1K+ $0.6000
Buy Now
24 Hour
rail
of
95
[logo]¢2¢T
LM385
M
SOIC
NARROW
Full
production
MSL
MSL
LM385M
8
8
N/A
N/A
N/A
N/A
1K+ $0.4300
1K+ $0.6000
Buy Now
reel
of
2500
[logo]¢2¢T
LM385
BM
SOIC
NARROW
Full
production
LM385BMX
Buy Now
reel
of
2500
[logo]¢2¢T
LM385
M
SOIC
NARROW
Full
production
MSL
MSL
LM385MX
8
3
N/A
N/A
N/A
N/A
1K+ $0.4300
1K+ $1.3000
Buy Now
24 Hour
box
of
1800
[logo]¢2¢T
LM385
BXZ
Full
production
TO 92
TO 92
TO 92
TO 92
LM385BXZ
Buy Now
24 Hour
box
of
1800
[logo]¢2¢T
LM385
BYZ
Full
production
MSL
MSL
MSL
LM385BYZ
LM385BZ
LM385Z
3
3
3
N/A
N/A
N/A
N/A
1K+ $0.9000
1K+ $0.6000
1K+ $0.4100
Buy Now
24 Hour
box
of
1800
[logo]¢2¢T
LM385
BZ
Full
production
Buy Now
24 Hour
box
of
1800
[logo]¢2¢T
LM385
Z
Full
production
N/A
N/A
N/A
N/A
N/A
N/A
Buy Now
tray
of
N/A
LM385-ADJ
MDC
Full
production
Samples
Die
-
-
wafer
jar
of
LM385-ADJ
MWC
Full
production
Wafer
N/A
General 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-46 package and a leadless chip
carrier package, while the LM285/LM385 are available in a low-cost TO-92 molded package, as well as S.O.
Features
●
●
●
●
●
Adjustable from 1.24V to 5.30V
Operating current of 10µA to 20mA
1% and 2% initial tolerance
1Ohm dynamic impedance
Low temperature coefficient
[Information as of 5-Aug-2002]
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