LM285BYZ-2.5 National Semiconductor, LM285BYZ-2.5 Datasheet - Page 8

• Manufacturer Part Number: LM285BYZ-2.5
• Description: Voltage Reference
• Manufacturer: National Semiconductor

Specifications of LM285BYZ-2.5

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Reference Volt Tolerance ±%: 0.8%
• Mounting Type: Through Hole
• Supply Current: 10mA
• Package / Case: 3-TO-92
• Voltage Reference Type: Shunt
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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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)