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LTC1043CN Datasheet(PDF) 11 Page - Linear Technology

Part # LTC1043CN
Description  Dual Precision Instrumentation Switched Capacitor Building Block
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1043CN Datasheet(HTML) 11 Page - Linear Technology

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LTC1043
11
1043fa
Lock-In Amplifier (= Extremely Narrow-Band Amplifier)
50MHz Termal RMS/DC Converter
LTC1043 • A013
13
1/4 LTC1043
T1 = TF5SX17ZZ, TOROTEL
RT = YSI THERMISTOR 44006
≈ 6.19k AT 37.5°C
MATCH 0.05%
6.19k = VISHAY S-102
OPERATE LTC1043 WITH
±5V SUPPLIES
LOCK-IN AMPLIFIER TECHNIQUE
USED TO EXTRACT VERY SMALL
SIGNALS BURIED INTO NOISE
5V
–5V
2
6.19k
100k
10k*
10k*
100Ω
0.01µF47µF
6.19k
1
4
3
6.19k
T1
500Hz
SINE DRIVE
THERMISTOR BRIDGE
IS THE SIGNAL SOURCE
SYNCHRONOUS
DEMODULATOR
RT
3
6
–
+
LT1007
5V
5V
–5V
ZERO CROSSING DETECTOR
2
3
4
1
8
1k
0.002
PHASE TRIM
50k
10k
7
5V
–5V
30pF
3
2
1
8
1M
1µF
–
+
LM301A
5V
–5V
2
3
4
6
–
+
LT1012
VOUT = 1000 • DC
BRIDGE SIGNAL
12
14
16
–
+
LT1011
*
+
LTC1043 • A14
30k*
30k*
100k*
301Ω*
10k
DC OUTPUT
0V TO 3.5V
10k
10k
RED
RED
T1B
*1% RESISTOR
T2B
1A
N
T2
T2A
GRN
300mV
10VRMS
INPUT
0.01µF
GRN
BRN
CALIBRATION ADJUST
20k
5V
5V
5V
10k
10k
3
2
4
1
8
5
6
7
2% ACCURACY DC 50MHZ
100:1 CREST FACTOR CAPABILITY
T1 TO T2 = YELLOW SPRINGS INST. CO.
THERMISTOR COMPOSITE
ENCLOSE T1 AND T2 IN STYROFOAM
3
2
4
6
1µF
1µF
1µF
0.01µF
1µF
1/2 LTC1043
5
15
5V
18
17
16
–
+
–
+
LT1013
LT1013
TYPICAL APPLICATIO S


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