ICL7621 Datasheet, PDF (5/9 Pages) Intersil Corporation – Dual, Low Power CMOS Operational Amplifiers

ICL7621
0.5µF
V_IN 10kΩ
2.2MΩ
+
1/2
ICL7621
-
10µF
1.8k = 5%
SCALE
ADJUST
COMMON
20kΩ
20kΩ
1MΩ
V_OH
TO
SUCCEEDING
INPUT
STAGE
V_OL
-
1/2
ICL7621
+
FIGURE 5. AVERAGING AC TO DC CONVERTER FOR A/D
CONVERTERS SUCH AS ICL7106, ICL7107,
ICL7109, ICL7116, ICL7117
+8V
+ _V+
- V-
T_A = +125°C
OUT
V+
-8V
FIGURE 6. BURN-IN AND LIFE TEST CIRCUIT
0.2µF
30kΩ
160kΩ
INPUT
0.1µF
360kΩ
+
1/2
ICL7621
-
360kΩ
NOTE 7
0.2µF
0.2µF
680kΩ 100kΩ 51kΩ
0.2µF
0.1µF
1MΩ
+
1/2
ICL7621
-
1MΩ
NOTE 7
OUTPUT
NOTES:
7. Small capacitors (25pF to 50pF) may be needed for stability in some cases.
8. The low bias currents permit high resistance and low capacitance values to be used to achieve low frequency cutoff. f_C = 10Hz, AV_CL = 4,
Passband ripple = 0.1dB.
FIGURE 7. FIFTH ORDER CHEBYCHEV MULTIPLE FEEDBACK LOW PASS FILTER
5
FN3403.5
March 4, 2010