ICL7611, ICL7612
0.2µF
30K
160K
+
ICL7611
680K
0.2µF
0.2µF
100K
51K
+
ICL7611
-
360K
INPUT
0.1µF
0.2µF
0.1µF
-
1M
OUTPUT
1M
(NOTE 5)
360K (NOTE 5)
NOTES:
5. Note that small capacitors (25pF to 50pF) may be needed for stability in some cases.
6. The low bias currents permit high resistance and low capacitance values to be used to achieve low frequency cutoff. f
C
= 10Hz, A
VCL
= 4,
Passband ripple = 0.1dB.
FIGURE 8. FIFTH ORDER CHEBYCHEV MULTIPLE FEEDBACK LOW PASS FILTER
Typical Performance Curves
10K
T
A
= 25
o
C
NO LOAD
NO SIGNAL
10
4
I
Q
= 1mA
SUPPLY CURRENT (µA)
10
3
V+ - V- = 10V
NO LOAD
NO SIGNAL
I
Q
= 1mA
SUPPLY CURRENT (µA)
1K
I
Q
= 100µA
100
10
2
I
Q
= 100µA
II
Q
= 10µA
Q
= 1mA
10
10
I
Q
= 10µA
1
0
2
4
6
8
10
SUPPLY VOLTAGE (V)
12
14
16
1
-50
-25
0
25
50
75
FREE-AIR TEMPERATURE (
o
C)
100
125
FIGURE 9. SUPPLY CURRENT PER AMPLIFIER vs SUPPLY
VOLTAGE
FIGURE 10. SUPPLY CURRENT PER AMPLIFIER vs FREE-AIR
TEMPERATURE
V
S
=
±5V
INPUT BIAS CURRENT (pA)
100
DIFFERENTIAL VOLTAGE GAIN (kV/V)
1000
1000
V
SUPP
= 10V
V
OUT
= 8V
R
L
= 1MΩ
I
Q
= 10µA
R
L
= 100kΩ
I
Q
= 100µA
R
L
= 10kΩ
I
Q
= 1mA
100
10
10
1.0
0.1
-50
-25
0
25
50
75
FREE-AIR TEMPERATURE (
o
C)
100
125
1
-75
-50
-25
0
25
50
75
100
125
FREE-AIR TEMPERATURE (
o
C)
FIGURE 11. INPUT BIAS CURRENT vs TEMPERATURE
FIGURE 12. LARGE SIGNAL DIFFERENTIAL VOLTAGE GAIN
vs FREE-AIR TEMPERATURE
7
INTERSIL [ INTERSIL CORPORATION ]
