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LM185-2.5 fiches techniques PDF

Linear Technology - Micropower Voltage Reference

Numéro de référence LM185-2.5
Description Micropower Voltage Reference
Fabricant Linear Technology 
Logo Linear Technology 





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LM185-2.5 fiche technique
FEATURES
s 20µA to 20mA Operating Range
s Guaranteed 1% Initial Voltage Tolerance
s Guaranteed 1Dynamic Impedance
s Very Low Power Consumption
U
APPLICATIO S
s Portable Meter References
s Portable Test Instruments
s Battery-Operated Systems
s Panel Meters
s Current Loop Instrumentation
LM185-2.5/
LM285-2.5/LM385-2.5
Micropower Voltage
Reference
DESCRIPTIO
The LM185-2.5 is a two-terminal band gap reference
diode that has been designed for applications which
require precision performance with micropower opera-
tion. The device provides guaranteed operation specifica-
tions at currents as low as 20µA. The nominal voltage is
2.5V with both 1% and 2% tolerances available. Some
additional features are: maximum dynamic impedance of
1, low noise and excellent stability over time and tem-
perature. The advanced design, processing and testing
techniques make Linear’s LM185-2.5 a superior choice
over previous designs. A circuit for cold junction compen-
sation of a thermocouple is shown below.
For applications requiring guaranteed temperature drift,
see the LT1034 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Thermocouple Cold Junction Compensator
IQ 50µA
2 MERCURY
CELLS 2.6V
16k
1M
LM385-2.5
TYPE K
100k W.W.
ZERO
950
+
METER
VIN
LM334
RSET
V
2k
450
10k ADJUST
FOR 12.17mV
AT 25°C
ACROSS 450
LM185-2.5 TA01
Reverse Voltage Change
16
–55°C TA +125°C
12
8
4
0
–4
0.01
0.1 1
10
REVERSE CURRENT (mA)
100
LM185-2.5 TA02
1

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