Datasheet

LTC2057/LTC2057HV
26
2057f
For more information www.linear.com/LTC2057
Typical applicaTions
Differential Thermocouple Amplifier
V
–
–15V
–15V
15V
15V
GND
V
IN
V
+
V
O
R
–
LT1025
2057 TA07
+ (YELLOW)
– (RED)
499k
–
+
LTC2057
LT1991A
V
CC
V
EE
REF
OUT
M9
M3
M1
7
6
V
OUT
= 10mV/°C
V
CM
10nF
249k
1%
1k
1%
22Ω
0.1µF
1k
1%
P1
P3
P9
8
9
10
1
2
3
100k
COUPLE THERMALLY
TYPE K
THERMOCOUPLE TEMP OF
–200°C TO 1250°C
GIVES –2V TO 12.5V V
OUT
ASSUMING 40µV/°C TEMPCO.
CHECK ACTUAL TEMPCO TABLE.
V
CM
= V
–
+ 0.1V TO V
+
– 1.5V (SMALL SIGNAL)
CMRR = 122dB (0.02°C ERROR PER VOLT)
5
4