ICL7106_0512 Datasheet, PDF (14/16 Pages) Intersil Corporation – 3½ Digit, LCD/LED Display, A/D Converters

ICL7106, ICL7107, ICL7107S
Typical Applications (Continued)
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
REF LO 35
C_REF 34
C_REF 33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
G2 25
C3 24
A3 23
G3 22
BP 21
TO PIN 1
100kΩ
100pF
10µF
1kΩ
0.1µF
22kΩ
SCALE FACTOR ADJUST
(V_REF = 100mV FOR AC TO RMS)
470kΩ
1N914
CA3140
5µF
+
-
100kΩ
2.2MΩ
0.47µF
47kΩ
0.22µF
10µF
1µF
10kΩ
4.3kΩ
1µF 10kΩ 1µF
0.22µF
+
9V
100pF
-
(FOR OPTIMUM BANDWIDTH)
TO DISPLAY
TO BACKPLANE
Test is used as a common-mode reference level to ensure compatibility with most op amps.
FIGURE 21. AC TO DC CONVERTER WITH ICL7106
AC IN
+5V
ICL7107
DM7407
LED
SEGMENTS
130Ω
130Ω
130Ω
FIGURE 22. DISPLAY BUFFERING FOR INCREASED DRIVE CURRENT
14
FN3082.8