OPA1612-Q1_15 Datasheet, PDF (23/31 Pages) Texas Instruments – OPA1612-Q1 SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifier

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OPA1612-Q1
SLOS931A – NOVEMBER 2015 – REVISED NOVEMBER 2015
Layout Guidelines (continued)
opposed to in parallel with the noisy trace is the preferred method.
• Place the external components as close to the device as possible. As shown in Figure 42, keeping RF and
RG close to the inverting input minimizes parasitic capacitance.
• Keep the length of input traces as short as possible. Always remember that the input traces are the most
sensitive part of the circuit.
• Consider a driven, low-impedance guard ring around the critical traces. A guard ring can significantly reduce
leakage currents from nearby traces that are at different potentials.
11.2 Layout Example
RIN
VIN
+
RG
VOUT
RF
(Schematic Representation)
Run the input traces
as far away from
the supply lines
as possible
Place components
close to device and to
each other to reduce
parasitic errors
RG
GND
RF
NC
±IN
VIN
+IN
RIN
V±
NC
V+
OUT
NC
VS+
GND
Use low-ESR, ceramic
bypass capacitor
Only needed for
dual-supply
operation
GND
VS±
(or GND for single supply)
VOUT
Ground (GND) plane on another layer
Figure 42. Operational Amplifier Board Layout for a Noninverting Configuration
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