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PDF LM385 Data sheet ( Hoja de datos )
| Número de pieza | LM385 | |
| Descripción | 1.2 & 2.5V MICROPOWER VOLTAGE REFERENCE | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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T H E I N F I N I T E P O W E R O F I N N O VAT I O N
L I N D O C #: 385
LM385/385B
1.2 & 2.5V MICROPOWER VOLTAGE REFERENCE
PR O D U C T I O N D ATA S H E E T
DESCRIPTION
The LM385/385B Micropower Voltage
References are two terminal bandgap
reference diodes designed and optimized
for accurate low power operation in
portable and other power sensitive
systems. Operating currents are
guaranteed from as low as 15µA up to
20mA for the LM385/385B-1.2, and 20µA
up to 20mA for the LM385/385B-2.5,
giving designers a great deal of flexibility
in optimizing power consumption, noise
and ultimate application performance. As
an added feature, the references output
impedance is extraordinarily low over the
entire operating range of quiescent
currents. This enables an extremely wide
dynamic load range with little effect on
the overall reference accuracy.
The LM385 family is available in fixed
1.2V and 2.5V reference values. Process
and circuit design optimization provide
for high accuracy with initial tolerance
values of 1% for the LM385B-1.2, 2% for
the LM385-1.2, 1.5% for the LM385B-2.5,
and 3% for the LM385-2.5.
Complementing their initial accuracy, the
bandgap reference is temperature
compensated to deliver 20ppm
performance over the 0° to 70°C
operating temperature range.
The LM385 family from Linfinity is a
pin-for-pin replacement for the LM385/
385B family of voltage references.
KEY FEATURES
s GUARANTEED 1% INITIAL ACCURACY
(LM385B-1.2)
s GUARANTEED 2.5% INITIAL ACCURACY
(LM385-1.2)
s GUARANTEED 1.5% INITIAL ACCURACY
(LM385B-2.5)
s GUARANTEED 3% INITIAL ACCURACY
(LM385-2.5)
p GUARANTEED 20µA OPERATING CURRENT
p LOW TEMPERATURE COEFFICIENT
p OPERATING CURRENT OF 20µA TO 20mA
p VERY LOW DYNAMIC IMPEDANCE . . . 1Ω
A P P L I C AT I O N S
s PORTABLE METER REFERENCES
p PORTABLE TEST INSTRUMENTS
p BATTERY OPERATED SYSTEMS
p CURRENT LOOP INSTRUMENTATION
1.2V R E F E R E N C E
PRODUCT HIGHLIGHT
MICROPOWER REFERENCE FROM
9V BATTERY
5V 9V
38k
1.2V
LM385-1.2V
200k
2.5V
LM385-2.5V
Copyright © 1996
Rev. 1.2 7/96
TA (°C)
0 to 70
PACKAGE ORDER INFORMATION
Reference
Voltage
Initial
Tolerance
DM
Plastic
8-pin
SOIC
LP
Plastic
3-pin
TO-92
1.2V
±30mV
±12mV
LM385DM-1.2
LM385BDM-1.2
LM385LP-1.2
LM385BLP-1.2
2.5V
±75mV
±38mV
LM385DM-2.5
LM385BDM-2.5
LM385LP-2.5
LM385BLP-2.5
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LM385DM-2.5T)
FOR FURTHER INFORMATION CALL (714) 898-8121
11861 WESTERN A VENUE, G ARDEN G ROVE, CA. 92841
1
1 page  
PRODUCT DATABOOK 1996/1997
1.2 & 2.5V MICROPOWER VOLTAGE REFERENCE
PR O D U C T I O N D ATA S H E E T
LM385/385B
C H A R A C T E R I S T I C C U R V E S — LM385/385B-1.2V
FIGURE 5. — REVERSE VOLTAGE CHANGE
FIGURE 6. — REVERSE DYNAMIC IMPEDANCE
16
14
TA = 0 to 70°C
12
10
8
6
4
2
0
-2
-4
0.01
0.1
1
10
Reverse Current - (mA)
100
1000
TA = 25°C
IR = 100µA
100
10
1
0.1
10
100 1k 10k
(f) Frequency - (Hz)
100k
FIGURE 7. — NOISE VOLTAGE
800
700
600
500
400
300
200
100
IR = 100µA
TA = 25°C
10 100 1k 10k
(f) Frequency - (Hz)
100k
Copyright © 1996
Rev. 1.2 7/96
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LM385.PDF ] | |
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