LT1013/LT1014
TYPICAL APPLICATIONS
Methane Concentration Detector with Linearized Output
+5V
1
* 1% METAL FILM RESISTOR
SENSOR = CALECTRO-GC ELECTRONICS #J4-807 OR FIGARO #813
LT1004
1.2V
390k*
9
0.033
–
A3
LT1014
8
2.7k
10
+
11
5
LTC1044
4
2
10µF
3
8
+5V
–5V
SENSOR
Q1
2
5k
1000ppm
TRIM
–
+
+5V
4
A1
LT1014
1
100k*
6
3
+9V INPUT
10k
10k
+9V
8
5
7
100µA
1
LT1013
3
120k
1%
LT1013
6
47k
330k
+9V
LT1004
1.2V
4
L = DALE TE-3/Q3/TA.
SHORT CIRCUIT CURRENT = 30mA.
≈
75% EFFICIENCY.
SWITCHING PREREGULATOR CONTROLS DROP ACROSS FET TO 200mV.
–
+
+
–
+
+
10µF
U
14
–5V
CD4016
100k*
1N4148
(4)
13
–
A4
LT1014
14
74C04
12
+
74C04
470pF
470pF
10k
+5V
1
14
CA3046
Q2
1000pF
Q3
Q4
–5V
1N4148
OUTPUT
500ppm-10,000ppm
50Hz 1kHz
2k
74C04
–
A2
LT1014
7
2k
150k*
5
+
12k*
Low Power 9V to 5V Converter
2N2905
L
+
1N4148
47
HP5082-2811
V
D
= 200mV
2N5434
390k
1%
2
5V
20mA
13
LINER [ LINEAR TECHNOLOGY ]
