Data Sheet

ICL7106, ICL7107, ICL7107S
FN3082 Rev 9.00 Page 13 of 17
October 24, 2014
FIGURE 17. ICL7107 MEASURING RATIOMETRIC VALUES OF QUAD
LOAD CELL
FIGURE 18. ICL7106 USED AS A DIGITAL CENTIGRADE
THERMOMETER
Typical Applications (Continued)
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V -
G2
C3
A3
G3
GND
100pF
TO PIN 1
0.1µF
100kΩ
0.47µF
TO DISPLAY
The resistor values within the bridge are determined by the desired
sensitivity.
V+
0.22µF
47kΩ
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V -
G2
C3
A3
G3
BP
100pF
TO PIN 1
0.1µF
0.01µF
100kΩ
100kΩ 1MΩ
9V
47kΩ
0.22µF
0.47µF
TO BACKPLANE
TO DISPLAY
A silicon diode-connected transistor has a temperature coefficient of
about -2mV/°C. Calibration is achieved by placing the sensing
transistor in ice water and adjusting the zeroing potentiometer for a
000.0 reading. The sensor should then be placed in boiling water and
the scale-factor potentiometer adjusted for a 100.0 reading.
SCALE
FACTOR
ADJUST
100kΩ 220kΩ
22kΩ
SILICON NPN
MPS 3704 OR
SIMILAR
ZERO
ADJUST