LT1025ACN8#PBF Linear Technology, LT1025ACN8#PBF Datasheet - Page 7

• Manufacturer Part Number: LT1025ACN8#PBF
• Description: IC THERMO COMPNSATR MICRPWR 8DIP
• Manufacturer: Linear Technology
• Type: Thermocouple Conditionerr

Specifications of LT1025ACN8#PBF

• Input Type: Voltage
• Output Type: Voltage
• Current - Supply: 150µA
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Compliant

APPLICATIO S I FOR ATIO
3. Calibrate output by adding in a true offset term which
does not affect gain (by summing, etc.). Calibration may
be done at any temperature either by immersing the
thermocouple in a calibrated bath or by substituting a
precision input voltage. The method which tends to
minimize worst-case error over the whole T
TYPICAL APPLICATIO S
TYPE K
1%
R1
1k
1 F
10k
R5
C2
U
100
R2
R6
9.1k
U
+
–
LTKA0x
0.1 F
255k
1%
R3
V
V
+
–
††
U
W
(Output Goes Negative with Increasing Temperature)
+
Type K Thermometer with Grounded Thermocouple
TYPE K
Eliminating Amplifier Feedback Resistors
–
††
OR EQUIVALENT. SEE “AMPLIFIER CONSIDERATIONS”
L
1 F
C2
3k
to T
U
GND
LT1025
H
V
V
2
3
IN
range
+
+
R
–
–
LTKA0x
V
O
0.1 F
15V
–15V
C1
7
4
††
–15V
V
is to calibrate at 1/6 or 5/6 of span. This may be modified
if best accuracy is desired at one particular point.
Breakpoint correction for nonlinearity is more compli-
cated than a simple offset, but a single breakpoint com-
bined with offset will reduce errors typically by 4:1 over a
simple offset technique.
–
R4*
470k
6
K
10mV/ C
V
GND
OUT
LT1025
15V
V
IN
R
–
V
V
–10mV/ C
*R4
OUT
MUST BE DECREASED APPROPRIATELY. R4 IS NOT
REQUIRED (OPEN) FOR LT1025 TEMPERATURES 0 C
WHEN SOURCING CURRENT ONLY
††
O
OR EQUIVALENT. SEE “AMPLIFIER CONSIDERATIONS”
30 A
–15V
V
–
300k
IF OUTPUT MUST SINK CURRENT, R4
LT1025
1025fb
7