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PDF LM385BLP-1.2 Data sheet ( Hoja de datos )
| Número de pieza | LM385BLP-1.2 | |
| Descripción | 1.2 & 2.5V MICROPOWER VOLTAGE REFERENCE | |
| Fabricantes | ETC | |
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LM285-1.2, LM385-1.2, LM385B-1.2
MICROPOWER VOLTAGE REFERENCES
D Operating Current Range
– LM285 . . . 10 µA to 20 mA
– LM385 . . . 15 µA to 20 mA
– LM385B . . . 15 µA to 20 mA
D 1% and 2% Initial Voltage Tolerance
D Reference Impedance
– LM385 . . . 1 Ω Max at 25°C
– All Devices . . . 1.5 Ω Max Over Full
Temperature Range
D Very Low Power Consumption
D Applications:
– Portable Meter References
– Portable Test Instruments
– Battery-Operated Systems
– Current-Loop Instrumentation
– Panel Meters
D Designed to be Interchangeable With
National LM285-1.2 and LM385-1.2
SLVS075C – APRIL 1989 – REVISED JULY 1999
D PACKAGE
(TOP VIEW)
NC
NC
NC
ANODE
1
2
3
4
8 CATHODE
7 NC
6 NC
5 NC
LP PACKAGE
(TOP VIEW)
ANODE
CATHODE
NC
NC–No internal connection
description
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.
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.
The LM285-1.2 is characterized for operation from –40°C to 85°C. The LM385-1.2 and LM385B-1.2 are
characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
PACKAGED DEVICES†
TA
VZ
TOLERANCE
SMALL OUTLINE
PLASTIC
CHIP FORM
(Y)
(D) (LP)
0°C to 70°C
2%
1%
LM385D-1.2
LM385BD-1.2
LM385LP-1.2
LM385BLP-1.2
LM385Y-1.2
–40°C to 85°C
1%
LM285D-1.2
LM285LP-1.2
The D package is available taped and reeled. Add the suffix R to the device type (e.g., LM385DR-1-2).
The chip form is tested at TA = 25°C.
† For ordering purposes, the decimal point in the part number must be replaced with a hyphen (i.e., show
the -1.2 suffix as “-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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1999, Texas Instruments Incorporated
1
1 page  
LM285-1.2, LM385-1.2, LM385B-1.2
MICROPOWER VOLTAGE REFERENCES
TYPICAL CHARACTERISTICS†
SLVS075C – APRIL 1989 – REVISED JULY 1999
REFERENCE IMPEDANCE
vs
REFERENCE CURRENT
100
f = 25 Hz
TA = –55°C to 125°C
10
1
0.1
0.01
0.1 1 10
IZ – Reference Current – mA
Figure 5
100
OUTPUT NOISE VOLTAGE
vs
CUTOFF FREQUENCY
70
IZ = 100 µA
60 TA = 25°C
ÎÎÎÎÎÎÎÎ50 100 µA
R
ÎÎÎÎÎÎÎÎÎÎRC Low Pass
40 C
30
20
10
0
0.1
1 10
f – Cutoff Frequency – kHz
Figure 7
100
NOISE VOLTAGE
vs
FREQUENCY
700
IZ = 100 µA
600 TA = 25°C
500
400
300
200
100
0
10 100 1 k 10 k
f – Frequency – Hz
Figure 6
TRANSIENT RESPONSE
ÎÎÎÎÎÎ1.5 Output
1 36 kΩ
VI VO
0.5
0
5
Input
0
0
100 500
t – Time – µs
Figure 8
100 k
600
† 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
5
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| PDF Descargar | [ Datasheet LM385BLP-1.2.PDF ] | |
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