HI7131CM44 INTERSIL [Intersil Corporation], HI7131CM44 Datasheet - Page 19

• Manufacturer Part Number: HI7131CM44
• Description: 3 1/2 Digit, Low Power, High CMRR, LCD/LED Display-Type A/D Converters
• Manufacturer: INTERSIL [Intersil Corporation]

Typical Applications
COMMON
REF LO
REF HI
OSC 1
OSC 2
OSC 3
IN LO
BUFF
TEST
C
C
IN HI
GND
REF
REF
A-Z
INT
V -
G2
C3
A3
G3
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
TO PIN 1
A silicon diode-connected transistor has a temperature coefficient of about -2mV/
is achieved by placing the sensing transistor in ice water and adjusting the zeroing potentiome-
ter 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. See AD590 data sheets for alternative circuits.
FIGURE 105A. HI7131 AND HI7133 USED AS A DIGITAL CENTIGRADE THERMOMETER
TO DISPLAY
0.047 F
0.47 F
180k
50pF
(V
0.1 F
REF
FIGURE 105B. AC TO DC CONVERTER AND HI7133 FOR RMS DISPLAY
SCALE FACTOR ADJUST
180k
(Continued)
> 100mV for AC to RMS)
20k
COMMON
BP/GND
REF LO
REF HI
OSC 1
OSC 2
OSC 3
IN LO
BUFF
TEST
C
C
IN HI
10 F
REF
REF
A-Z
INT
G2
G3
V -
C3
A3
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
10 F
180k
0.1 F
HI7131, HI7133
0.01 F
TO DISPLAY
0.047 F
FIGURE 105.
180k
50pF
TO PIN 1
3-1844
0.47 F
390k
TO BACKPLANE 0V
100k
200k 470k
1 F
SCALE
FACTOR
ADJUST
ZERO
ADJUST
470k
1M
100pF (FOR OPTIMUM BAND WIDTH)
4.3K
10k
9V
100k
SILICON NPN
MPS 3764 OR
SIMILAR
1 F
10k
o
C. Calibration
1 F
1 F
0.22 F
2.2M
+
-
100k
AC IN
-5V
+5V