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OPA2690 Datasheet(PDF) 17 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part No. OPA2690
Description  Dual, Wideband, Voltage-Feedback OPERATIONAL AMPLIFIER with Disable
Download  30 Pages
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Maker  BURR-BROWN [Burr-Brown (TI)]
Homepage  http://www.burr-brown.com
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OPA2690 Datasheet(HTML) 17 Page - Burr-Brown (TI)

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OPA2690
SBOS238D − JUNE 2002 − REVISED DECEMBER 2004
www.ti.com
17
50
V
I
−V
I
R
O
R
O
R
F
402
R
F
402
50
R
G
1/2
OP A 2 6 9 0
1/2
OP A 2 6 9 0
V
DIFF =1 +
V
I − (− VI)
2R
F
R
G
Figure 8. High-Speed Differential Receiver
SINGLE-SUPPLY MFB DIFFERENTIAL
ACTIVE FILTER: 10MHz BUTTERWORTH
CONFIGURATION
The active filter circuit shown in Figure 9 can be easily
implemented using the OPA2690. In this configuration,
each amplifier of the OPA2690 operates as an integrator.
For this reason, this type of application is also called
infinite gain filter implementation. A Butterworth filter can
be implemented using the following component ratios:
f
O
+
1
2
p
R
C
(cutoff frequency)
R
1
+ R
2
+ 0.65
R
R
3
+ 0.375
R
C
1
+ C
C
2
+ 2
C
6k
R
2A
102
C
1A
100pF
C
2
200pF
C
1B
100pF
R
1A
102
R
1B
102
R
3A
60
R
3B
60
50
6k
+12V
V
CM
V
CM
V
OUT
V
IN
1000pF
50
1/2
OP A 2690
1/2
OP A 2690
R
2B
102
Figure 9. Single-Supply, MFB Active Filter, 10MHz LP Butterworth


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