ICL7126 View Datasheet(PDF) - Renesas Electronics
Part Name
Description
Manufacturer
ICL7126 Datasheet PDF : 15 Pages
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ICL7216
Typical Applications
OSC 1 40
OSC 2 39
180k
OSC 3 38
TEST 37
50pF
SET VREF
= 100mV
REF HI 36
V+ 35
CREF 34
CREF 33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
0.1F
10k 220k
0.33F
180k
1M
0.01F
INT 27
V - 26 750k
0.047F
G2 25
C3 24
A3 23
TO DISPLAY
G3 22
BP/GND 21
TO BACKPLANE
+
IN
-
9V
Values shown are for 200mV full scale, 3 readings/sec., floating
supply voltage (9V battery).
FIGURE 10. ICL7126 USING THE INTERNAL REFERENCE
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
V+ 35
CREF 34
CREF 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/GND 21
180k
50pF
SET VREF
= 1.000V
0.1F
250k 240k
0.22F
1.8M
1M
0.01F
750 0.047F
TO DISPLAY
TO BACK PLANE
V+
+
IN
-
V-
3 reading/s. For 1 reading/sec., delete 750 resistor, change CINT,
ROSC to values of Figure 11.
FIGURE 12. RECOMMENDED COMPONENT VALUES FOR 2.0V
FULL SCALE
FN3084 Rev.5.00
Oct 25, 2004
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
V+ 35
CREF 34
CREF 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/GND 21
560k
50pF
20k
SET VREF
= 100mV
0.1F
V+
200k 27k
0.33F
180k
1M
0.01F
+
IN
-
0.15F
V-
TO DISPLAY
IN LO is tied to COMMON, thus establishing the correct common
mode voltage. COMMON acts as a pre-regulator for the reference.
Values shown are for 1 reading/sec.
FIGURE 11. ICL7126 WITH AN EXTERNAL BAND-GAP
REFERENCE (1.2V TYPE)
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
V+ 35
CREF 34
CREF 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/GND 21
100k
100pF
SET VREF
= 100mV
0.1F
+5V
1k 10k 15k
1.2V (ICL8069)
1M
+
0.01F
IN
0.47F
-
47k
0.22F
TO DISPLAY
Since low TC zeners have breakdown voltages ~6.8V, diode must
be placed across the total supply (10V). As in the case of Figure 12,
IN LO may be tied to COMMON.
FIGURE 13. ICL7126 WITH ZENER DIODE REFERENCE
Page 11 of 15
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