Typical Applications
CA3440
+9V
4.7MΩ
2
2.2MΩ
INPUT
500pF
3
2µF
+
22MΩ
7
-
CA3440
6
+
8
4
5
10MΩ
1
4.7MΩ
OUTPUT
RIN >20MΩ
Standby Power = 90µW
Gain = 20dB
BW: 20Hz to 3kHz
SR = 0.016V/µs
12MΩ
1.2MΩ
9, 11
10
1, 2
1.2MΩ
22MΩ
8 +5V
7
2-
CA3440
6
3+
4
6, 8
5
1
7
4, 5 DIODES
FROM CA3086
3
13
2.35V
AT 200µA
FIGURE 3. HIGH INPUT IMPEDANCE AMPLIFIER
Typical Performance Curves
FIGURE 4. MICROPOWER BANDGAP REFERENCE
2.0
1.6
1.2
0.8
0.4
0
-0.4
-0.8
-1.2
-1.6
-2.0
0
VO-
0 = (V+ OR V-)
TA = 25oC
RL = 100kΩ
VICR-
VICR+
VO+
5
10
15
SUPPLY VOLTAGE (V)
FIGURE 5. OUTPUT VOLTAGE SWING AND COMMON MODE
INPUT VOLTAGE RANGE vs SUPPLY VOLTAGE
1000
TA = 25oC
VS = ±5V
100
10
1
10
100
1000
10,000
SUPPLY CURRENT (nA)
FIGURE 6. SET CURRENT vs SUPPLY CURRENT
3-149