LT1013 Datasheet, PDF (15/20 Pages) Linear Technology – Quad Precision Op Amp

LT1013/LT1014
TYPICAL APPLICATIONS
5V Powered, Linearized Platinum RTD Signal Conditioner
499Ω
Q1
167Ω
Q2
2N4250
(2)
1.5k SENSOR
2M
200k
2–
A2
1
200k
3 ¹+^{/4 LT1014} _5k
LINEARITY
2M
150Ω
9–
A4
8
10 ¹+^{/4 LT1014}
GAIN TRIM
1k
3.01k
ROSEMOUNT
118MF
6
7
A3
1/4 LT1014
5
8.25k
50k
ZERO
TRIM
274k
+5V
4
13
14
A1
10k
1/4 LT1014
12
250k
11
+5V
2.4k
5%
LT1009
2.5V
OUTPUT
0V–4V =
0°C–400°C
±0.05°C
ALL RESISTORS ARE TRW-MAR-6 METAL FILM.
RATIO MATCH 2M–200K ± 0.01%.
TRIM SEQUENCE:
SET SENSOR TO 0 ° VALUE.
ADJUST ZERO FOR 0V OUT.
SET SENSOR TO 100 °C VALUE.
ADJUST GAIN FOR 1.000V OUT.
SET SENSOR TO 400 °C.
ADJUST LINEARITY FOR 4.000V OUT, REPEAT AS REQUIRED.
Strain Gauge Bridge Signal Conditioner
+5V
220
0.1
1
+
100µF
8
2
LTC1044
4
5
+5V
8
2
1/2 LT1013
3
4
LT1004
1.2V
39k
V ≈ –V_REF
100µF
V_REF
301k
E
D
A
PRESSURE
TRANSDUCER
350Ω
C
10k
ZERO
TRIM
100k
0.33
1.2V_OUT REFERENCE
TO A/D CONVERTER
FOR RATIOMETRIC OPERATION
1mA MAXIMUM LOAD
5₊
7
1/2 LT1013
6_–
0.047
OUTPUT 0V–3.5V
0psi–350psi
2k GAIN TRIM
* 1% FILM RESISTOR.
PRESSURE TRANSDUCER–BLH/DHF–350.
46k*
CIRCLED LETTER IS PIN NUMBER.
100Ω*
15