DIO32276LN12

Overview

The DIO32276LN12 is a double-pole double-throw (DPDT) analog switch designed for high-fidelity audio applications. It features an ultra-low on-resistance of 0.8Ω typical at 3.3V and supports negative voltage swing capability. The device operates within a supply voltage range of 1.65V to 5.5V, with a maximum DC switch I/O voltage of -3.0V to 5.5V. Key electrical specifications include a THD+N of -110dB at 2VRMS into a 600Ω load, off-isolation of -110dB, and crosstalk of -110dB. It utilizes a DQFN 1.8x1.8-12 package and includes external capacitor connectivity for pop-and-click noise suppression.

Feature Summary

• Supports negative voltage swing for Hi-Fi audio signal routing
• Ultra-low on-resistance ensures minimal signal attenuation
• Integrated pop-and-click suppression via external capacitor
• Power-off protection maintains high-impedance state on common ports

Applications

• Mobile phones
• Tablets
• Notebook PCs
• Media players
• Docking stations

Procurement Notes

Verify the specific ordering suffix LN12 to confirm the tape and reel packaging quantity of 3000 units. Ensure the component meets RoHS compliance standards as indicated in the manufacturer's documentation. Cross-reference the datasheet revision to confirm pinout and electrical characteristics match the design requirements before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring DPDT switching with negative voltage support. The low on-resistance makes it suitable for driving headphones or line outputs. Consider the external capacitor requirement for turn-on ramp time control if pop-and-click noise mitigation is critical. Verify that the operating temperature range of -40°C to 85°C aligns with the target environment.

Part Context

The DIO32276 belongs to Dioo Microcircuits' portfolio of high-performance analog switches. It is specifically engineered for portable consumer electronics where space is limited and audio quality is paramount. The DQFN 1.8x1.8-12 package allows for compact PCB layouts in modern mobile devices and multimedia systems.

Replacement Considerations

No direct public substitute part numbers are documented in the provided source material. Evaluate alternative DPDT analog switches with similar on-resistance and negative voltage capabilities if replacement is necessary.

FAQ

How does the DIO32276 handle pop-and-click noises?

It provides an external capacitor connection (C_EXT) that allows users to select the turn-on ramp time, effectively minimizing pop-and-click sounds during operation.

What is the behavior of the switch when VCC is 0V or floating?

When VCC is 0V or floating, all switch I/O ports enter a high-impedance (Hi-Z) state, providing power-off protection.

Can the DIO32276 handle signals below ground potential?

Yes, the device supports negative voltage swing, with a recommended DC switch I/O voltage range extending down to -3.0V.