OPA2604-Q1 Datasheet, PDF (12/16 Pages) Texas Instruments – DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER

OPA2604ĆQ1
DUAL FETĆINPUT, LOW DISTORTION
OPERATIONAL AMPLIFIER
SGLS209 − NOVEMBER 2003
R1
VIN
6.04kΩ
12
OPA2604
R2
4.02kΩ
R2
4.02kΩ
C1
1000pF
R4
5.36kΩ
C2
1000pF
R5
2kΩ
12
OPA2604
12
OPA2604
VO
C3
1000pF
Low−pass
3−pole Butterworth
f−3dB = 40kHz
See Application Bulletin AB−026
for information on GIC filters.
Figure 25. Three-Pole Generalized Immittance Converter (GIC) Low-Pass Filter
C1*
I−Out DAC
COUT
R1
2kΩ
12
OPA2604
R2
2.94kΩ
C2
2200pF
R3
21kΩ
* C1 =~
COUT
2π R1 fc
R1 = Feedback resistance = 2kΩ
fc = Crossover frequency = 8MHz
12
OPA2604
VO
C3
470pF
Low−pass
2−pole Butterworth
f−3dB = 20kHz
Figure 26. DAC I/V Amplifier and Low-Pass Filter
12
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