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LM385BのメーカーはAnalog Integrations Corporationです、この部品の機能は「Adjustable Micropower Voltage Reference」です。 |
部品番号 | LM385B |
| |
部品説明 | Adjustable Micropower Voltage Reference | ||
メーカ | Analog Integrations Corporation | ||
ロゴ | |||
このページの下部にプレビューとLM385Bダウンロード(pdfファイル)リンクがあります。 Total 7 pages
LM385/LM385B
Adjustable Micropower Voltage Reference
n FEATURES
l Adjustable from 1.24V to 5.3V.
l Operating Current from 10µA to 20mA.
l Low Temperature Coefficient.
l 1% and 2% Initial Tolerance.
l Low Dynamic Impedance.
n APPLICATIONS
l Portable, Battery-Powered Equipment.
l Instrumentation.
l Process Control.
l Energy Management.
l Product Testing.
l Automotive.
l Precision Audio Components.
n TYPICAL APPLICATION
CIRCUIT
V IN
RS
+
LM385
-
1.24V
IR
FB
Precision 1.24V Voltage Reference
n DESCRIPTION
The LM385 is micropower 3-terminal adjustable
band-gap voltage reference. Operating from
1.24V to 5.3V and over 10µA to 20mA current
range. They feature exceptionally low dynamic
impedance and good temperature stability. On-
chip trimming is used to achieve tight voltage
tolerance. Since the LM385 band-gap reference
uses only transistors and resistors, low noise
and good longterm stability result.
Careful design of the LM385 has made the de-
vice 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 LM385
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.
Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
TEL: 886-3-5772500
FAX: 886-3-5772510 www.analog.com.tw
DS-385B-01 012102
1
1 Page LM385/LM385B
n ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
Reverse Voltage
IR=100µA
LM385B
LM385
Reverse Voltage Change with
Current
Minimum Operating Current
Dynamic Output Impedance
Reference Voltage Change with
Output Voltage
IRMIN ≤IR ≤1mA
1mA≤IR ≤20mA
VOUT =1.24V
VOUT =5.3V
IR=100µA, f=100Hz
IAC=0.1IR, VOUT=1.24V,
VOUT =5.3V
IR=100µA
SYMBOL MIN. TYP. MAX. UNIT
VR
1.228 1.240 1.252
1.215 1.240 1.265
V
0.2 1
∆VR 5 15 mV
IRMIN
7 11
35 55 µA
ZR 0.4 Ω
1
2 5 mV
Feedback Current
IFB 8 20 nA
Output Wideband Noise
Average Temperature
Coefficient (Note)
IR=100µA, 10Hz<f<10KHz
VOUT =1.24V,
VOUT =5.3V
IR=100µA
eN
αVR
50 µVRMS
170
100 ppm/°C
Long Term Stability
IR=100µA, T=1000Hrs,
TA=25°C±0.1°C
∆VR/∆t
20
ppm
Note : The average temperature coefficient is defined as the maximum deviation of reverse voltage at all
measured temperatures from TMIN to TMAX, divided by TMAX - TMIN. The measured temperatures are
0°C, 25°C, 50°C and 70°C.
n TYPICAL PERFORMANCE CHARACTERISTICS
1.0 100
0.8
TA= -55°C
TA= 25°C
10
0.6 TA= 125 °C
0.4
1
0.2
TA= -55 °C
TA= 125°C
TA= 25°C
0
0.01
0.1
1
0.1
10 100
0
0.2 0.4 0.6 0.8
1
1.2 1.4
Forward Current (mA)
Reverse Voltage (V)
Fig. 1 Forward characteristics
Fig. 2 Reverse Characteristics
3
3Pages n APPLICATION EXAMPLES (Continued)
D1
+ FB
-
R1
120K
R2
1M
R3
330 >-12V
LED ON
-5V
Fig. 13 Voltage Level Detector
LM385/LM385B
n PHYSICAL DIMENSIONS
l SOT-89 (unit: mm)
D
D1
H
L
e
e1
E
B
A
SYMBOL
MIN
MAX
C A 1.40 1.60
B 0.36
0.48
C 0.35
0.44
D 4.40
4.60
D1 1.62
1.83
E 2.29
2.60
e 1.50 (TYP.)
e1 3.00 (TYP.)
H 3.94
4.25
L 0.89
1.20
l SOT-89 Marking
Part No.
LM385CX
LM385BCX
Marking
AI01
AIB01
6
6 Page | |||
ページ | 合計 : 7 ページ | ||
|
PDF ダウンロード | [ LM385B データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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LM385 | Adjustable Micropower Voltage Reference | Analog Integrations Corporation |
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