Datasheet

OPA604
11
SBOS019A
www.ti.com
FIGURE 8. Digital Audio DAC I-V Amplifier.FIGURE 7. High Impedance Amplifier.
FIGURE 9. Using Two OPA604 Op Amps to Double the Output Current to a Load.
OPA604OPA604
A
1
A
2
V
IN
R
1
R
2
I
1
R
4
51 Ω
I
2
OPA604
R
3
51 Ω
I
L
= I
1
+ I
2
Load
V
OUT
= V
IN
(1+R
2
/R
1
)
V
OUT
OPA604
G = 101
(40dB)
100Ω 10kΩ
Piezoelectric
Transducer
1MΩ
(1)
NOTE: (1) Provides input
bias current return path.
OPA604
V
O
= ±3Vp
R
F
= Internal feedback resistance = 1.5kΩ
f
C
= Crossover frequency = 8MHz
C
1
(1)
NOTE: (1) C
1
≈
C
OUT
2π R
f
f
c
To low-pass
filter.
OPA604
5
6
9
PCM63
20-bit
D/A
Converter
10