ICL7611, ICL7612
-
1µF
+
ICL7611
+
1M
V
OUT
1M
-
ICL7611
+
-
λ
ICL7611
+
1M
V-
V+
DUTY CYCLE
680kΩ
WAVEFORM GENERATOR
NOTE: Low leakage currents allow integration times up to several
hours.
FIGURE 3. PHOTOCURRENT INTEGRATOR
NOTE: Since the output range swings exactly from rail to rail, frequency
and duty cycle are virtually independent of power supply variations.
FIGURE 4. PRECISE TRIANGLE/SQUARE WAVE GENERATOR
1M
V
OH
0.5µF 10K
V
IN
2.2M
20K
TO
SUCCEED-
ING
INPUT
STAGE
V
OL
+8V
+ V+
OUT
I
Q
T
A
= 125
o
C
+
ICL7611
10µF
1.8K = 5%
SCALE
ADJUST
20K
-
-
V-
-
COMMON
ICL7611
+
-8V
V+
FIGURE 5. AVERAGING AC TO DC CONVERTER FOR A/D
CONVERTERS SUCH AS ICL7106, ICL7107,
ICL7109, ICL7116, ICL7117
FIGURE 6. BURN-IN AND LIFE TEST CIRCUIT
-
V
IN
+ BAL
25k
BAL
V
OUT
V+
FIGURE 7. V
OS
NULL CIRCUIT
6
INTERSIL [ INTERSIL CORPORATION ]
