ICL7611_07 Datasheet, PDF (7/13 Pages) Intersil Corporation – 1.4MHz, Low Power CMOS Operational Amplifiers

ICL7611, ICL7612
1μF
+
-
ICL7611
λ
+
V_OUT
NOTE: Low leakage currents allow integration times up to several
hours.
FIGURE 3. PHOTOCURRENT INTEGRATOR
0.5μF 10k
V_IN
2.2M
+
ICL7611
-
10μF
1.8k = 5%
SCALE
ADJUST
COMMON
1M
V_OH
20k
TO
SUCCEED-
ING
20k
INPUT
STAGE
V_OL
-
ICL7611
+
FIGURE 5. AVERAGING AC TO DC CONVERTER FOR A/D
CONVERTERS SUCH AS ICL7106, ICL7107,
ICL7109, ICL7116, ICL7117
-
ICL7611
+
1M
1M
-
ICL7611
+
1M
V-
V+
DUTY CYCLE
680kΩ
WAVEFORM GENERATOR
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
+8V
+ _V+
OUT
I_Q
- V-
T_A = +125°C
V+
-8V
FIGURE 6. BURN-IN AND LIFE TEST CIRCUIT
-
V_IN
BAL
+ ^BAL
25k
V_OUT
V+
FIGURE 7. V_OS NULL CIRCUIT
7
FN2919.9
April 26, 2007