Datasheet
16
LT1113
1113fb
LINEAR TECHNOLOGY CORPORATION 1993
LT/CPI 1101 1.5K REV B • PRINTED IN USA
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
Light Balance Detection Circuit
Unity Gain Buffer with Extended Load Capacitance Drive Capability
1113 • TA07
V
OUT
= 1M • (I
1
– I
2
)
PD
1,
PD
2
= HAMAMATSU S1336-5BK
WHEN EQUAL LIGHT ENTERS PHOTODIODES, V
OUT
< 3mV.
–
+
1/2 LT1113
R1
1M
C1
2pF TO 8pF
PD
1
PD
2
I
1
I
2
V
OUT
1113 • TA08
V
OUT
–
+
1/2 LT1113
C1
V
IN
R2
1k
C
L
R1
33Ω
C1 = C
L
≤
0.1
µ
F
OUTPUT SHORT-CIRCUIT CURRENT
(
∼
30mA) WILL LIMIT THE RATE AT WHICH THE
VOLTAGE CAN CHANGE ACROSS LARGE CAPACITORS
(I = C
dV
)
dt
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1028 Single Low Noise Precision Op Amp V
NOISE
= 1.1nV/√Hz Max
LT1124 Dual Low Noise Precision Op Amp V
NOISE
= 4.2nV/√Hz Max
LT1169 Dual Low Noise Precision JFET Op Amp 10pA I
B
LT1462 Dual Picoamp I
B
C-Load
TM
Op Amp I
B
= 2pA Max, 10000pF C-Load, I
S
= 45µA
LT1464 Dual Picoamp I
B
C-Load Op Amp I
B
= 2pA Max, 10000pF C-Load, I
S
= 200µA
LT1792 Single Low Noise Precision Op Amp Single LT1113
LT1793 Single Low Noise Precision Op Amp Single LT1169
C-Load is a trademark of Linear Technology Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com