LM285BXZ-2.5 National Semiconductor, LM285BXZ-2.5 Datasheet - Page 8
LM285BXZ-2.5
Manufacturer Part Number
LM285BXZ-2.5
Description
IC,VOLT REFERENCE,FIXED,2.5V,BIPOLAR,SIP,3PIN,PLASTIC
Manufacturer
National Semiconductor
Specifications of LM285BXZ-2.5
Rohs Compliant
NO
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LM385-2.5 Applications
Adjustment Procedure
1. Adjust TC ADJ pot until voltage across R1 equals Kelvin
2. Adjust zero ADJ pot until voltage across R2 equals the
temperature multiplied by the thermocouple Seebeck
coefficient.
thermocouple Seebeck coefficient multiplied by 273.2.
Micropower Thermocouple Cold Junction
Compensator
Typical supply current 50 µA
Thermocouple
Type
T
K
S
J
Improving Regulation of Adjstable Regulators
(Continued)
Seebeck
efficient
(
µ
52.3
42.8
40.8
Co-
V/˚C)
6.4
DS005519-6
63.4 150
523 1.24k
432
412 953
( )
R1
8
( )
R2
1k
DS005519-7
Across R1
Voltage
@
15.60
12.77
12.17
1.908
(mV)
25˚C
Across R2
Voltage
14.32
11.78
11.17
1.766
(mV)