OPA1662-Q1_16 Datasheet, PDF (20/33 Pages) Texas Instruments – Operational Amplifier

OPA1662-Q1
SLOS805C – JULY 2012 – REVISED AUGUST 2016
9 Application and Implementation
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NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The OPA1662-Q1 is a unity-gain stable, precision dual op amp with very low noise. Applications with noisy or
high-impedance power supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF
capacitors are adequate. Figure 43 shows a simplified schematic of the OPA1662-Q1 (one channel shown) while
Figure 49 shows an additional application idea.
9.2 Typical Application
820 W
R
2200 pF
+V_A
(+15 V)
C
0.1 mF
I_OUTL+
Audio DAC
with Differential
Current
Outputs
PCM1794A-Q1
I_OUTL-
OPA1662-Q1
-V_A
(-15 V)
0.1 mF
820 W
2200 pF
+V_A
(+15 V)
0.1 mF
OPA1662-Q1
680 W
R1
620 W
R2
330 W
R3
2700 pF
+V_A
(+15 V)
C2
0.1 mF
C1
8200 pF
680 W
R1
620 W
R2
OPA1662-Q1
100 W
VO
-V_A
(-15 V)
0.1 mF
R3 330 W
C2 2700 pF
L Ch
Output
-V_A
(-15 V)
0.1 mF
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Figure 49. Audio DAC Current to Voltage Converter and Output Filter
20
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