TLE2682 Datasheet, PDF (35/49 Pages) Texas Instruments – HIGH-SPEED JFET-INPUT DUAL OPERATIONAL AMPLIFIER WITH SWITCHED-CAPACITOR VOLTAGE CONVERTER

TLE2682
HIGHĆSPEED JFETĆINPUT DUAL OPERATIONAL AMPLIFIER
WITH SWITCHEDĆCAPACITOR VOLTAGE CONVERTER
SLOS127 − JUNE 1993
APPLICATION INFORMATION
As the load increases, filtering is still effective, but noise and ripple become more prominent (see Figure 83 through
Figure 86):
RIPPLE AND SWITCHING NOISE ON
SWITCHED-CAPACITOR OUTPUT
vs
TIME
200
150
100
RIPPLE AND SWITCHING NOISE ON
SWITCHED-CAPACITOR OUTPUT
vs
TIME
20
VCC+ = 5 V
15
IL = 10 mA
CIN = 100 µF
COUT = 10 µF
10
50
5
0
− 50
− 100
− 150
VCC+ = 5 V
IL = 10 mA
CIN = 100 µF
COUT = 10 µF
Without Filter
− 200
0 10 20 30 40 50 60 70 80 90 100
t − Time − µs
Figure 83
0
−5
− 10
Filter:
LF = 50 µH
− 15
CF = 220 µF
See Figure 78
− 20
0 10 20 30 40 50 60 70 80 90 100
t − Time − µs
Figure 84
RIPPLE AND SWITCHING NOISE ON
SWITCHED-CAPACITOR OUTPUT
vs
TIME
80
VCC+ = 5 V
60
IL = 10 mA
CIN = 100 µF
COUT = 100 µF
40
Without Filter
20
0
− 20
RIPPLE AND SWITCHING NOISE ON
SWITCHED-CAPACITOR OUTPUT
vs
TIME
20 _{VCC+ = 5 V}
IL = 10 mA
15 _{CIN = 100 µF}
COUT = 10 µF
10
5
0
−5
− 40
− 60
− 80
0
10 20 30 40 50 60 70 80 90 100
t − Time − µs
Figure 85
−10 _Filter:
LF = 50 µH
−15 CF = 220 µF
See Figure 78
− 20
0 10 20 30 40 50 60 70 80 90 100
t − Time − µs
Figure 86
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