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LT1997-2 Datasheet(PDF) 21 Page - Analog Devices

Part # LT1997-2
Description  Precision, Wide Voltage Range, Gain Selectable Funnel Amplifier
PDF  26 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT1997-2 Datasheet(HTML) 21 Page - Analog Devices

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LT1997-2
21
Rev 0
For more information www.analog.com
APPLICATIONS INFORMATION
Figure 11. Detection of an LED Open Circuit Fault Condition
Figure 10. Direct Line Voltage (120VAC, 60Hz) Measurement
19972 F10
OUT
REF
250k
250k
100k
125k
25k
125k
100k
25k
–INA –INB –INC
+INA +INB +INC
LT1997-2 CONFIGURED FOR GAIN = 0.069 (ATTENUATION = 14.5)
V–
V+
SHDN
15V
–15V
VOUT
LT1997-2
NEUTRAL
EARTH
LINE
120V RMS
LINE
OUTPUT
TIME (ms)
0
10
20
30
40
50
–200
–160
–120
–80
–40
0
40
80
120
160
200
–15
–12
–9
–6
–3
0
3
6
9
12
15
19972 F10
19972 F11
OUT
REF
250k
250k
VREG
0.1µF
SW
470µF
QTLP690C
N = 16
CTRL
100k
125k
25k
125k
LT3590
GND
100k
25k
–INA –INB –INC
VIN
4Ω
1µF
LED
+INA +INB +INC
V–
V+
SHDN
5V
VOUT
LT1997-2
1µF
VIN = 48V
LT1997-2 CONFIGURED FOR GAIN = 0.08 (ATTENUATION = 12.5)



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