LM368H-2.5 [NSC]
LM368-2.5 Precision Voltage Reference; LM368-2.5精密基准电压源
| 型号： | LM368H-2.5 |
| 厂家： | 
National Semiconductor |
| 描述： | LM368-2.5 Precision Voltage Reference |
| 文件： | 总8页 (文件大小：136K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
December 1994
LM368-2.5 Precision Voltage Reference
General Description
Features
Y
400 mA operating current
The LM368-2.5 is a precision, monolithic, temperature-com-
pensated voltage reference. The LM368-2.5 makes use of
thin-film technology enhanced by the discrete laser trim-
ming of resistors to achieve excellent Temperature coeffi-
Y
Low output impedance
Y
Excellent line regulation (.0001%/V typical)
Single-supply operation
Y
Y
Y
Y
Y
cient (Tempco) of V
OUT
(as low as 11 ppm/ C), along with
§
Externally trimmable
tight initial tolerance, (as low as 0.02%). The trim scheme is
such that individual resistors are cut open rather than being
trimmed (partially cut), to avoid resistor drift caused by elec-
tromigration in the trimmed area. The LM368-2.5 also pro-
vides excellent stability vs. changes in input voltage and
output current. The output is short circuit proof. A trim pin is
Low temperature coefficient
Excellent initial accuracy (0.02% typical)
Best reference available for low-voltage operation
e
e
2.500V)
(V
5V, V
S
REF
made available for fine trimming of V
OUT
or for obtaining
intermediate values without greatly affecting the Tempco of
the device.
Connection Diagram
Metal Can Package (TO-5)
TL/H/8446–1
Top View
*case connected to Vb
Order Number LM368H-2.5 LM368YH-2.5
See NS Package Number H08C
Typical Applications
Low Voltage Reference
TL/H/8446–2
C
1995 National Semiconductor Corporation
TL/H/8446
RRD-B30M115/Printed in U. S. A.
Absolute Maximum Ratings (Note 7)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Soldering Information
TO-5 (H) Package (10 sec.)
a
300 C
§
See AN-450 ‘‘Surface Mounting Methods and Their Effect
on Product Reliability’’ (Appendix D) for other methods of
soldering surface mount devices.
Input Voltage
35V
Power Dissipation
600 mW
b
a
60 C to 150 C
Storage Temperature Range
Operating Temperature Range
§
0 C to 70 C
§
a
§
§
Electrical Characteristics (Note 1)
LM368-2.5
Tested
Limit
Design
Limit
Units
(Max. unless
noted)
Parameter
Conditions
Typical
(Note 2)
(Note 3)
g
g
0.2
V
Error: LM368
0.02
%
%/V
OUT
s
s
g
g
g
g
Line Regulation
5.0V
0 mA
e
V
30V
0.0001
0.0003
0.0005
0.0025
IN
s
s
10 mA
Load Regulation (Note 8)
Thermal Regulation
I
%/mA
%/100 mW
mA
SOURCE
g
g
T
20 mS (Note 4)
0.005
350
3
0.02
550
5
Quiescent Current
s
s
30V
Change of Quiescent Current vs. V
5.0V
V
IN
mA/V
IN
Temperature Coefficient
s
s
s
g
g
g
20
of V
OUT
(see graph): LM368Y-2.5
LM368-2.5
0 C
§
0 C
§
T
70 C
§
70 C
§
11
15
ppm/ C
§
ppm/ C
§
A
s
g
(Note 5)
T
A
30
e
Short Circuit Current
V
OUT
0
30
70
100
mA
Noise:
0.1–10 Hz
12
uVp-p
100 Hz–10 kHz
420
nV/ Hz
0
s
s
V
V
OUT
Adjust Range
0
V
1.9–5.2
2.2–5.0
s
C 200 pF.
L
V min.
PIN5
OUT
25 C, 4.9V
s
V
s
s
s
s
e
Note 1: Unless otherwise noted, these specifications apply: T
10.5V, 0
I
0.5 mA, 0
§
Note 2: Tested Limits are guaranteed and 100% tested in production.
A
IN
LOAD
Note 3: Design Limits are guaranteed (but not 100% production tested) over the indicated temperature and supply voltage ranges. These limits are not used to
calculate outgoing quality levels.
Note 4: Thermal Regulation is defined as the change in the output Voltage at a time T after a step change in power dissipation of 100 mW.
Note 5: Temperature Coefficient of V
OUT
is defined as the worst case delta-V
measured at Specified Temperatures divided by the total span of the Specified
OUT
Temperature Range (See graphs). There is no guarantee that the Specified Temperatures are exactly at the minimum or maximum deviation.
Note 6: In metal can (H), i is 75 C/W and i is 150 C/W.
§
§
Note 7: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
J-C
J-A
the device beyond its Rated Operating Conditions (see Note 1 and Conditions).
Note 8: Load regulation is measured on the output pin at a point (/8 below the base of the package. Regulation is measured at constant junction temperature,
×
using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
2
Typical Performance Characteristics (Note 1)
Quiescent Current vs. Input
Voltage and Temperature
Dropout Voltage vs.
Output Current
Output Change vs.
Output Current
TL/H/8446–3
Typical Temperature Coefficient Calculations:
LM368-2.5 (see Curve A)
e
c
T.C. 1.7 mV/(70 2.5V)
§
e
9.7 ppm/ C
§
3
Typical Applications
g
Narrow Range Trimmable Regulator ( 1% min.)
Wide Range Trimmable Regulator
TL/H/8446–5
TL/H/8446–6
Improved Noise Performance
TL/H/8446–7
g
g
2.5V, 1.25V References
e
(/4 LM324A or
(/2 LM358A
TL/H/8446–8
e
R
Thin Film Resistor Network,
g
0.05% Matching and 5 ppm Tracking
(Beckman 694-3-R-10K-A),
(Caddock T-914-10K-100-05)
or similar.
4
Typical Applications (Continued)
Multiple Output Voltages
TL/H/8446–9
TL/H/8446–10
e
R
Thin Film Resistor Network
0.05% Matching and 5 ppm Tracking
(Beckman 694-3-R-10K-A),
(Caddock T-914-10K-100-05)
or similar.
Reference with Booster
100 mA Boosted Reference
TL/H/8446–11
TL/H/8446–12
5
Typical Applications (Continued)
Buffered High-Current Reference with Filter
TL/H/8446–13
Simplified Schematic Diagram
TL/H/8446–14
*Reg. U.S. Pat. Off.
6
7
Ý
Lit. 106560
Physical Dimensions inches (millimeters)
Metal Can Package (H)
Order Number LM368H-2.5 or LM368YH-2.5
NS Package Number H08C
This data sheet contains preliminary limits and design specifications. Supplemental information will be published at a later date. National Semiconductor
reserves the right to make changes in the products contained in this document in order to improve design or performance and to supply the best possible
products. National also assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes
no representations that the circuits are free from patent infringement. Applications for any integrated circuits contained in this document are for illustration
purposes only and National makes no representation or warranty that such applications will be suitable for the use specified without further testing or
modification.
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 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
National Semiconductor
Europe
National Semiconductor
Hong Kong Ltd.
National Semiconductor
Japan Ltd.
a
1111 West Bardin Road
Arlington, TX 76017
Tel: 1(800) 272-9959
Fax: 1(800) 737-7018
Fax:
(
49) 0-180-530 85 86
@
13th Floor, Straight Block,
Ocean Centre, 5 Canton Rd.
Tsimshatsui, Kowloon
Hong Kong
Tel: (852) 2737-1600
Fax: (852) 2736-9960
Tel: 81-043-299-2309
Fax: 81-043-299-2408
Email: cnjwge tevm2.nsc.com
a
a
a
a
Deutsch Tel:
English Tel:
Fran3ais Tel:
Italiano Tel:
(
(
(
(
49) 0-180-530 85 85
49) 0-180-532 78 32
49) 0-180-532 93 58
49) 0-180-534 16 80
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.
相关型号：
©2020 ICPDF网 联系我们和版权申明