til300 ETC-unknow, til300 Datasheet
til300
Manufacturer Part Number
til300
Description
Precision Linear Optocoupler
Manufacturer
ETC-unknow
Datasheet
1.TIL300.pdf
(10 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
til300A
Manufacturer:
KOREA
Quantity:
20 000
t
www.taosinc.com
Description
NOTES: A. K1 is servo current gain, the ratio of the feedback servo photodiode current (I
D
D
D
D
D
The TIL300 precision linear optocoupler consists of an infrared LED irradiating an isolated feedback photodiode
and an output photodiode in a bifurcated arrangement. The feedback photodiode captures a percentage of the
flux of the LED that can be used to generate a control signal to regulate the LED drive current. This technique
is used to compensate for the nonlinear time and temperature characteristics of the LED. The output-side
photodiode then produces an output signal that is linearly proportional to the servo-optical flux emitted from the
LED.
A typical application circuit (shown in Figure 1) uses an operational amplifier as the input to drive the LED. The
feedback photodiode sources current through R1, which is connected to the inverting input of the input
operational amplifier. The photocurrent I
magnitude of the current is directly proportional to the LED current through the feedback transfer gain
K1(V
the node voltage V
The output photodiode is connected to a noninverting voltage follower; R2 is used to develop a voltage from
the photodiode current. The output of the amplifier is V
V
overall transfer gain becomes V
independent of the LED current.
ac or dc Signal Coupling
Wide Bandwidth . . . >200 kHz
High Transfer-Gain Stability . . . 0.005%/ C
3500 V Peak Isolation
Typical Applications
–
–
–
–
O
B. K2 is forward gain, the ratio of the output photodiode current (I
C. K3 is transfer gain, the ratio of the forward gain to the servo gain, i.e. K3 = K2/K1.
/V
+
–
P
I
I
V
Power-Supply Feedback
Medical-Sensor Isolation
Opto Direct-Access Arrangement (DAA)
Isolated Process-Control Transducers
/R1 = K1 I
R1
= (K2I
I
V
F
V
b
R2/K1I
a
1V
1V
+
_
F
CC+
CC–
). The operational amplifier supplies LED current to produce sufficient photocurrent to keep
b
Texas Advanced Optoelectronic Solutions Inc.
equal to node voltage V
F
R1). Factoring out the LED forward current I
800 Jupiter Road, Suite 205 S Plano, TX 75074 S (972) 673-0759
I
P1
t
R3
I
1V
F
Figure 1. Typical Application Circuit
CC+
O
P
/V
t
1
2
3
4
I
P1
= K3R2/R1. The overall transfer gain, therefore, is shown to be
assumes a magnitude that satisfies the relationship I
a.
TIL300
K1
K2
P2
6
5
I
O
P2
) to the input LED current (I
2V
= K2I
CC+
F
R2. Overall transfer gain V
F
R2
P1
and remembering that K2/K1 = K3, the
LEDK
LEDA
PDK1
PDA1
NC – No internal connection
) to the input LED current (I
t
2V
2V
DCS OR P PACKAGE
–
+
CC+
CC–
(TOP VIEW)
1
2
3
4
F
), i.e. K2 = I
8
7
6
5
V
O
NC
NC
PDK2
PDA2
= K3(R2/R1) V
Copyright
TAOS018 – AUGUST 1999
P2
F
/I
), i.e. K1 = I
F
P1
.
O
/V
= V
2000, TAOS Inc.
I
becomes
I
/R1. The
I
P1
/I
F.
1
Related parts for til300
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
ETC-unknow
Datasheet:
Part Number:
Description:
Manufacturer:
ETC-unknow
Datasheet: