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LT1057_1 Datasheet, PDF (13/16 Pages) Linear Technology – Dual and Quad, JFET Input Precision High Speed Op Amps | |||
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LT1057/LT1058
TYPICAL APPLICATIONS
Instrumentation Ampliï¬er with Shield Driver
3+
1/4
1
1k
10k
LT1058
2â
RF
9.1k
GUARD
INPUT
GUARD
RG
1k
10
8
1/4
LT1058
9
RG
1k
15V
5+
4
1/4
7
LT1058
6â
11
â15V
OUTPUT
13 â
RF
9.1k
1/4
14
12 LT1058
+
1k
GAIN = 10(1+RF/RG) z 100
10k
IB = 5pA
RIN = 10127
BW = 350kHz
10578 TA09
100dB Range Logarithmic Photodiode Ampliï¬er
IP
LT1021-10V
15V
IN
OUT
6 Q4 4
5
500pF
â
1/2
LT1057
+
10k*
10k*
2k
10
11
2k
Q5
12
0.033μF
â
LM301A
+
1M
1M
FULL-SCALE
750k* TRIM
50k*
0.01μF
â
1/2
LT1057
+
1
3k
2
3
Q2
50k
DARK
TRIM
EOUT
15
14 Q1
13
= HP-5082-4204 PIN PHOTODIODE.
Q1âQ5 = CA3096.
CONNECT SUBSTRATE OF CA3096
ARRAY TO Q4âs EMITTER.
*1% RESISTOR
100dB RANGE LOGARITHMIC PHOTODIODE AMPLIFIER
33Ω
7
8
Q3
9
15V
LIGHT (900μM)
1MW
100μW
10μW
1μW
100nW
10nW
RESPONSE DATA
DIODE CURRENT
350μA
35μA
3.5μA
350nA
35nA
3.5nA
CIRCUIT OUTPUT
10.0V
7.85V
5.70V
3.55V
1.40V
â0.75V
10578 TA10
10578fc
13
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