OPA2604-Q1 Datasheet, PDF (13/16 Pages) Texas Instruments – DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER

OPA2604ĆQ1
DUAL FETĆINPUT, LOW DISTORTION
OPERATIONAL AMPLIFIER
SGLS209 − NOVEMBER 2003
7.87kΩ
−
VIN
100pF
+
7.87kΩ
100kHz Input Filter
12
OPA2604
12
OPA2604
10kΩ
10kΩ
12
OPA2604
10kΩ
10kΩ
VO
G=1
Figure 27. Differential Amplifier with Low-Pass Filter
Piezoelectric
Transducer
100Ω
10kΩ
12
OPA2604
G = 101
(40dB)
1MΩ*
* Provides input bias
current return path.
* C1 ≈
COUT
2π Rf fc
Rf = Internal feedback resistance = 1.5kΩ
fc = Crossover frequency = 8MHz
10
PCM63 ⁵
20−bit 6
D/A
Converter ⁹
C1*
12
OPA2604
VO = ±3Vp
To low−pass
filter.
Figure 28. High Impedance Amplifier
Figure 29. Digital Audio DAC I-V Amplifier
1/2 OPA2604
A2
1/2 OPA2604
A1
VIN
R2
R3
51Ω
i1
R1
VOUT = VIN (1 + R2/R1)
I2
R4
51Ω
IL = I1 + I2
VOUT
Load
Figure 30. Using the Dual OPA2604 Op Amp to Double the Output Current to a Load
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