ICL7611, ICL7612
-
1M
ICL7611
-
1F
+
+
ICL7611
+
1M
-
V
ICL7611
OUT
1M
V-
V+
+
DUTY CYCLE
680k
WAVEFORM GENERATOR
NOTE: Since the output range swings exactly from rail to rail, frequency
and duty cycle are virtually independent of power supply variations.
NOTE: Low leakage currents allow integration times up to several
hours.
FIGURE 3. PHOTOCURRENT INTEGRATOR
FIGURE 4. PRECISE TRIANGLE/SQUARE WAVE
GENERATOR
1M
+8V
V
OH
0.5F 10k
2.2M
20k
20k
TO
T
= +125°C
A
+
V
SUCCEED-
ING
V+
V-
IN
+
10F
1.8k = 5%
INPUT
STAGE
OUT
ICL7611
I
Q
-
SCALE
-
V
OL
ADJUST
V+
-
ICL7611
-8V
COMMON
+
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
V
IN
OUT
BAL
BAL
+
25k
V+
FIGURE 7. V
NULL CIRCUIT
OS
FN2919 Rev 9.00
April 26, 2007
Page 7 of 13
RENESAS [ RENESAS TECHNOLOGY CORP ]
