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PDF LT1004-2.5 Data sheet ( Hoja de datos )
| Número de pieza | LT1004-2.5 | |
| Descripción | Micropower Voltage Reference | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s Guaranteed ±4mV Initial Accuracy LT1004-1.2
s Guaranteed ±20mV Accuracy LT1004-2.5
s Guaranteed 10µA Operating Current
s Guaranteed Temperature Performance
s Operates up to 20mA
s Very Low Dynamic Impedance
U
APPLICATIONS
s Portable Meter References
s Portable Test Instruments
s Battery-Operated Systems
s Current Loop Instrumentation
LT1004
Micropower Voltage
Reference
DESCRIPTION
The LT®1004 Micropower Voltage Reference is a
2-terminal bandgap reference diode designed to provide
high accuracy and excellent temperature characteristics at
very low operating currents. Optimization of the key
parameters in the design, processing and testing of the
device results in accuracy specifications previously attain-
able only with selected units. Below is a distribution plot of
reference voltage for a typical lot of LT1004-1.2. Virtually
all of the units fall well within the prescribed limits of
±4mV.
The LT1004 is a pin-for-pin replacement for the
LM185/LM385 series of references with improved accu-
racy specifications. More important, the LT1004 is an
attractive device for use in systems where accuracy was
previously obtained at the expense of power consump-
tion and trimming.
For a low drift micropower reference with guaranteed
temperature coefficient, see the LT1034 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Micropower Cold Junction Compensation for Thermocouples
100k
3V
LITHIUM
*
R1
LT1004-1.2
1684Ω
186Ω
5k AT
25°C
†
+
1.8k
+
–
THERMOCOUPLE
TYPE
J
R1
233k
K 299k
T 300k
S 2.1M
–
* QUIESCENT CURRENT ≅ 15µA
† YELLOW SPRINGS INST. CO.
PART #44007
COMPENSATES WITHIN
±1°C FROM 0°C TO 60°C
1004 TA01
Typical Distribution of
Reference Voltage (LT1004-1.2)
200
180 1200 PARTS
TA = 25°C
160
140
120
100
80
60
40
20
1004 TA02
1
1 page  
TYPICAL APPLICATIONS
High Stability 5V Regulator
LT1338A
VIN ≥ 8V
IN OUT
+
1µF
ADJ
LT1004-2.5
5V
300Ω
1%
100Ω
1%
1004 TA03
Constant Gain Amplifier
Over Temperature
250k 250k
V + ≥ 5V
OUTPUT
INPUT
2N3904
200k
LT1004-1.2 60k
V– ≤ –5V
1004 TA07
Lead Acid Low Battery Detector
R1†
1%
1M
3+ 7
LM4250
6
133k 2 – 8
1% 4
LT 10M
1004-1.2
† R1 SETS TRIP POINT, 60.4k
PER CELL FOR 1.8V/CELL
BATTERY
OUTPUT
12V
LO = BATTERY LOW
1004 TA14
LT1004
Variable Output Supply
LT338A
VIN VIN VOUT
+
1µF
ADJ
LT1004-1.2
V– – 1V
R1 ≤ 0.015
R1
V–
2k
120Ω
VOUT
+
10µF
1004 TA08
Micropower 5V Reference
LM334
R
VIN
9V to 15V
5.6k
LT1004-1.2
3+ 7
LM4250
2–
4
6
8
22M
1M
1%
150pF
VOUT
5V
3.01M
1%
1004 TA13
Ground Referenced Current Source
15V
2k*
LT1004-1.2
R
IOUT
2– 7
LT1007C
6
1004 TA04
3+
4
–5V
IOUT
=
1.235
R
2V
R ≈ IOUT + 10µA
* MAY BE INCREASED
FOR SMALL OUTPUT CURRENTS
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LT1004-2.5.PDF ] | |
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