Datasheet

13
LTC1051/LTC1053
10513fa
–
+
–
+
0.1µF
0.1µF
1/2
LTC1051
1/2
LTC1051
Q1 Q10.0022µF 22pF
10k
0.1%
1k
0.1%
V
IN
1nA < I
IN
<1mA
V
OUT
= LOG V
IN
–2V
2M
15.8k
0.1%
3k
0.1%
1N4148
5V
5V
2.5V
–5V
1
2
3
4
5
6
7
8
2.5M
0.1%
LT1009
Q1: TEL LAB TYPE Q81
ADJUST 2M POR. FOR NONLINEARITIES
1051/53 AC05
Six Decade Log Amplifier
Dual Instrumentation Amplifier
Linearized Platinum Signal Conditioner
–
+
1/2
LTC1051
5
6
7
5V
1µF
1µF
–
+
1/2
LTC1051
3
2
1
5V
8
4
6
5
2
3
4
18
1716
1µF
7
11
12
1413
0.01µF
1k
GAIN
ADJUST
5k
1k
8.06k*
0V TO 4V =
0°C TO 400°C
±0.05°C
8.25k*
274k*
10k*
50k
ZERO
ADJUST
250k*
LT1009
2.5V
2.4k
RP = ROSEMOUNT 118MFRTD
*1% FILM RESISTOR
TRIM SEQUENCE:
SET SENSOR TO 0°C VALUE. ADJUST ZERO FOR 0V OUT
SET SENSOR TO 100°C VALUE. ADJUST GAIN FOR 1.000V OUT
SET SENSOR TO 400°C VALUE. ADJUST LINEARITY FOR 4.000V OUT
REPEAT AS REQUIRED. FOR MORE INFORMATION REFER TO AN3
15
887Ω
1µF
0.1µF
2k
1/2 LTC1043
1/2 LTC1043
R
P
100Ω
AT 0°C
I
K
1051/53 AC07
(LINEARITY CORRECTION LOOP)
8
–
+
1/2
LTC1051
3
2
1
1k
0.22µF
100k
5V
5V
V
OUT1
V
OUT2
1µF
1µF
–
+
1/2
LTC1051
5
6
7
4
8
1k
0.22µF
0.0047µF
100k
1µF
8
7
11
12
1413
1µF
5
6
2
3
17
1518
416
–
+
–
+
INPUT 1
INPUT 2
GAIN = 101V/DIV
CMRR >100dB
V
OS
≅ 3µV
INPUT REFERRED NOISE ≅ 2µV
P-P
1051/53 AC06
LTC1043
TYPICAL APPLICATIO S
U