Datasheet

14
LT1113
1113fb
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
Low Noise Light Sensor with DC Servo
10Hz Fourth Order Chebyshev Lowpass Filter (0.01dB Ripple)
8
+V
–V
4
1113 • TA05
R1
1M
C1
2pF
7
5
6
–
+
1/2 LT1113
R2C2 > C1R1
C
D
= PARASITIC PHOTODIODE CAPACITANCE
V
O
= 100mV/µWATT FOR 200nm WAVE LENGTH
330mV/µWATT FOR 633nm WAVE LENGTH
R5
1k
D2
1N914
2N3904
V
–
R4
1k
D1
1N914
R3
1k
1
3
2
–
+
1/2 LT1113
C2
0.022µF
HAMAMATSU
S1336-5BK
OUTPUT
R2
100k
C
D
1113 • TA06
V
OUT
TYPICAL OFFSET
≈
0.8mV
1% TOLERANCES
FOR V
IN
= 10V
P-P
, V
OUT
= –121dB AT f > 330Hz
= –6dB AT f = 16.3Hz
LOWER RESISTOR VALUES WILL RESULT IN LOWER THERMAL NOISE AND LARGER CAPACITORS
R3
249k
C2
100nF
C1
33nF
R1
237k
V
IN
R2
237k
R6
249k
C4
330nF
5
6
–
+
1/2 LT1113
7
C3
10nF
R4
154k
R5
154k
8
15V
–15V
4
1
3
2
–
+
1/2 LT1113