Datasheet

LTC1051/LTC1053
12
10513fa
+
–
R1
R2
RR
1/4
LTC1053
2
3
1
+
–
R1
R2
R
1/4
LTC1053
+
–
1/4
LTC1053
6
5
7
+
–
R1
R2
R
1/4
LTC1053
9
10
13
12
14
4
11
8
V
IN
0.1µF
0.1µF
5V
–5V
V
OUT
V
OUT
/V
IN
= 3(R2/R1); INPUT DC – 10Hz NOISE
≅ 0.8µV
P-P
= NOISE OF EACH PARALLELED OP AMP/√3
NOTE: THIS CIRCUIT CAN ALSO BE USED AS A
DIFFERENCE AMPLIFIER FOR STRAIN GAUGES.
CONNECT R2/3 AND R1/3 FROM NONINVERTING
INPUTS, SHORTED TOGETHER, TO GROUND AND
TO SOURCE RESPECTIVELY.
1051/53 AC02
+
–
–
+
1/4
LTC1053
+
–
1/4
LTC1053
+
–
1/4
LTC1053
1/4
LTC1053
9
10
12
13
2
3
5
6
7
1
14
10k
10k 10k
10k
10k
20k
20k
10k
8
4
11
0.1µF
0.1µF
0.1µF
0.1µF
5V
–5V
I
OUT
R
LOAD
1051/53 AC03
20k
10k 10k
R
G
V1
V2
• I
OUT
= 2(V2 – V1)/R
G
• BW = 100Hz
•
I
OUTMAX
= 1mA
–
+
–
+
–
+
–
+
5V
2
7
5
4
GND
LT1025A
R
–
K
100Ω
100Ω
100Ω
255k
0.068µF
255k
0.068µF
255k
0.068µF
0.1µF
0.1µF
0.1µF
1k
1k
1k
1/4
LTC1053
1/4
LTC1053
1/4
LTC1053
1/4
LTC1053
10k
10k
10k
10k
5V
ABSOLUTE
TEMPERATURE
ABSOLUTE
TEMPERATURE
OUTPUT
(DIFFERENTIAL
TEMPERATURE)
13
12
14
4
11
T
REF
TYPE K
+–
TYPE K
+–
TYPE K
+
–
6
5
7
2
3
1
9
10
8
T2
T1
ALL FIXED RESISTORS ARE 1% METAL FILM
OUTPUT = T
REF
– T1 OR T
REF
– T2(10mV PER °C)
ACCURACY = (±0.1% FROM 25°C TO 150°C)
1051/53 AC04
S1
Paralleling Choppers to Improve Noise Differential Voltage to Current Converter
Multiplexed Differential Thermometer
TYPICAL APPLICATIO S
U