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PDF LM285BXZ Data sheet ( Hoja de datos )
| Número de pieza | LM285BXZ | |
| Descripción | Adjustable Micropower Voltage References | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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February 2000
LM185/LM285/LM385
Adjustable Micropower Voltage References
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.
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.
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.
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
Connection Diagrams
TO-92
Plastic Package
SOIC Package
DS005250-9
Bottom View
TO-46
Metal Can Package
DS005250-1
Bottom View
DS005250-10
Top View
20-Leadless Chip Carrier
© 2000 National Semiconductor Corporation DS005250
DS005250-15
Top View
www.national.com
1 page  
Typical Performance Characteristics (Continued)
Temperature Coefficient Typical
LM185
LM285
LM385
Typical Applications
Precision 10V Reference
Low AC Noise Reference
DS005250-4
DS005250-25
25V Low Current Shunt Regulator
DS005250-26
200 mA Shunt Regulator
DS005250-27
5
DS005250-28
www.national.com
5 Page 
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
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM285BXZ.PDF ] | |
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