LT1004 데이터 시트보기 (PDF) - Linear Technology
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LT1004 Datasheet PDF : 8 Pages
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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
APPLICATIO S
s Portable Meter References
s Portable Test Instruments
s Battery-Operated Systems
s Current Loop Instrumentation
LT1004
Micropower Voltage
Reference
DESCRIPTIO
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 APPLICATIO
Micropower Cold Junction Compensation for Thermocouples
100k
3V
LITHIUM
*
R1
LT1004-1.2
1684Ω
186Ω
5k AT 25°C†
+
1.8k
+
THERMOCOUPLE
TYPE
J
K
T
S
–
R1
233k
299k
300k
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
1200 PARTS
180
TA = 25°C
160
140
120
100
80
60
40
20
1004 TA02
1
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