IL300 데이터 시트보기 (PDF) - Siemens AG
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IL300 Datasheet PDF : 8 Pages
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Figure 22. Non-inverting and inverting amplifiers
Non-Inverting Input
Non-Inverting Output
+Vref2
R5
Vin
R1
3 + 7 Vcc
–Vcc
1
R2
6
100Ω
2
2–
4
–Vcc +Vcc
20pF
3
4
IL 300 8
R6
7
2–
Vcc
7
Vcc 6
6
Vo
5
3+
–Vcc
4
R3
R4
–Vref1
Inverting Input
Inverting Output
Vin
R1
3
R2
2
+
–
7
Vcc
6
Vcc
4
100Ω
1
+Vcc
2
20pF 3
IL 300 8 +Vref2
7
3+
Vcc
6
7
Vcc 6
Vout
R3
–Vcc 4
5
2 – –Vcc
4
+Vref1
R4
Table 2. Optolinear amplifiers
Amp[ifier
Input
Non-Inverting
Inverting
Output
Inverting
Non-Inverting
Non-Inverting
Inverting
Inverting
Non-Inverting
Non-Inverting
Inverting
Gain
VOUT=K3 R4 R2
VIN R3 (R1+R2)
VOUT=K3 R4 R2 (R5+R6)
VIN R3 R5 (R1 +R2)
VOUT=–K3 R4 R2 (R5+R6)
VIN R3 R5 (R1 +R2)
VOUT=–K3 R4 R2
VIN R3 (R1 +R2)
Offset
Vref2=
Vref1 R4 K3
R3
Vref2=
–Vref1 R4 (R5+R6) K3
R3 R6
Vref2=
Vref1 R4 (R5+R6) K3
R3 R6
Vref2=
–Vref1 R4 K3
R3
These amplifiers provide either an inverting or non-inverting
transfer gain based upon the type of input and output amplifier.
Table 2 shows the various configurations along with the spe-
cific transfer gain equations. The offset column refers to the
calculation of the output offset or Vref2 necessary to provide a
zero voltage output for a zero voltage input. The non-inverting
input amplifier requires the use of a bipolar supply, while the
inverting input stage can be implemented with single supply
operational amplifiers that permit operation close to ground.
For best results, place a buffer transistor between the LED and
output of the operational amplifier when a CMOS opamp is
used or the LED IFq drive is targeted to operate beyond 15 mA.
Finally the bandwidth is influenced by the magnitude of the
closed loop gain of the input and output amplifiers. Best band-
widths result when the amplifier gain is designed for unity.
IL300
5–8
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