Datasheet

LTC1043
12
1043fa
Quad Single 5V Supply, Low Hold Step, Sample-and-Hold
Single Supply Precision Linearized Platinum RTD Signal Conditioner
LTC1043 • A15
NC
OUTPUT
OUTPUT
NC
5V
2
3
11
4
1
11
7 8
V
IN
C
L
0.01µF
C
L
0.01µF
V
IN
6
5
7
12
13 14
–
+
1/4 LT1014
–
+
1/4 LT1014
– 5V
HOLD
SAMPLE
FOR 1V ≤ V
IN
≤ 4V, THE HOLD STEP IS ≤ 300µV
ACQUISITION TIME ~ 8 • R
ON
C
H
FOR 10-BIT ACCURACY
LTC1043 • A16
NC
OUTPUT
OUTPUT
NC
13
12
14
2
6 5
V
IN
C
L
0.01µF
C
L
0.01µF
9
10
8
3
18 15
16 17 4
–
+
1/4 LT1014
–
+
1/4 LT1014
V
IN
LTC1043 • A17
887Ω
1mA
R
p
= 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
1µF
8.06k*
1k*
5k
0V TO 4V = 0°C TO 400°C
±0.05°C
1µF
2k
R
p
100Ω
AT 0°C
12
11
7
1µF
0.1µF
1/2 LTC1043
8
14
13
5
1µF
1/2 LTC1043
6
18
16
5V
5V
250k*
(LINEARITY CORRECTION LOOP)
2.4k
2.74k*
8.25k*
50k
ZERO
ADJUST
LT1009
2.5V
10k*
3
2
4
1
8
5
6
7
1k
GAIN
ADJUST
–
+
1/2 LT1013
–
+
1/2 LT1013
4
15
17
0.01µF
3
2
*
TYPICAL APPLICATIO S
U