LV2622

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

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www.unisonic.com.tw

QW-R102-045.a

APPLICATION NOTES(Cont.)

Power-Supply Bypassing and Layout

The UTC LV2622 can apply for a single +2.5V~+5.5V supply or dual ±1.25V~±2.75V supplies. For single-supply

bypass them to ground, and 2.2µF tantalum capacitor for better performance.

By decreasing the amount of stray capacitance at the op amp’s inputs and output, PC board l performance can be

optimized. For example, placing external components as close to the device as possible can minimize trace lengths

and widths. and using surface-mount components is a better way.

For the operational amplifier, soldering the part to the board directly is strongly recommended. The EMI can be

minimized because keeping the high frequency big current loop area small.

Grounding

A ground plane layer is important for UTC LV2622 circuit design. The length of the current path speed currents in

an inductive ground return will create an unwanted voltage noise. Broad ground plane areas will reduce the parasitic

inductance.

Input-to-Output Coupling

The input and output signal traces should not be parallel to minimize capacitive coupling. This helps reducing

unwanted positive feedback.