Datasheet

LTC201A/LTC202/LTC203
11
201a23fb
Micropower Thermocouple Temperature to Frequency Converter
APPLICATIO S I FOR ATIO
WUUU
–
–
+
+
V
+
GND
GND
S2S1 S3 S4
NC
IN3IN2IN1 IN4
D3D2 D4D1 V
–
11
16
3
13
12
6
5
1
9
814
4
15
10
7
2
6V
6.8µF
0.02µF
LTC203
100k
100k
100°C 1.5kΩ
TRIM
10k
240k
6.81kΩ**
1M
LT1049
LT1004-1.2V
LT1025
300pF
100pF
LT201_202_203 • AI14
390pF*
6V
6V
6V
74C14
6V
6V
0.47µF
2N3906
2N3904
C1
C2
C4
C3
Q2
Q1
NC
“A”
OUTPUT
0°C to 100°C
D.C. to 1kHz
R–
K
+
V
TYPE K
THERMOCOUPLE
NOTES:
POLYSTYRENE
IRC/TRW MTR/5/+ 120ppm
360µA OPERATING CURRENT
4.75V TO 10V SUPPLY VOLTAGE
FOR 4mV FULL SCALE “GENERAL PURPOSE”
V → F DELETE LT1025 AND THERMOCOUPLE
AND DRIVE POINT “A”
*
**