ETQ5228M: High-Performance CMOS Analog Switch for Automotive Audio

As automotive electronics become increasingly intelligent, audio switching has become an important part of in-vehicle electronic system design. Automotive T-BOX, infotainment, and audio systems may need to switch between multiple audio sources while maintaining low distortion, low power consumption, and reliable operation.

To address these requirements, ETEK introduces the ETQ5228M, a high-performance dual SPDT CMOS analog switch designed for automotive audio applications. With low on-resistance, negative signal transmission capability, low standby current, and low total harmonic distortion, the ETQ5228M provides a compact solution for automotive audio signal switching.

ETEK ETQ5228M CMOS Analog Switch for Automotive Audio

The ETQ5228M is a dual single-pole double-throw (SPDT) CMOS analog switch that integrates two independent switching channels into one device. It can be used to select and route different analog audio signals according to the control signal from an MCU.

The device operates from 1.8V to 5.5V and supports an analog signal voltage range of -2V to VCC. This negative signal transmission capability makes the ETQ5228M particularly suitable for audio applications where the input waveform may extend below ground.

Key features include:

– Supply voltage: 1.8V to 5.5V

– Signal voltage range: -2V to VCC

– Low on-resistance: 0.4Ω

– Continuous channel current: ±300mA

– Standby current: 500nA

– Low THD+N: 0.06%

– Operating temperature: -40°C to 105°C

– Dual SPDT configuration

These features allow the ETQ5228M to combine signal integrity, switching flexibility, and low power consumption in a single automotive-grade device.

Low On-Resistance and Low Distortion

For automotive audio systems, the switching device is part of the audio signal path, so its electrical characteristics can directly affect audio performance.

The ETQ5228M features a low 0.4Ω on-resistance (RON), which helps minimize resistance introduced into the signal path and supports efficient analog signal transmission.

At the same time, its THD+N is only 0.06%, helping reduce unwanted distortion and noise during audio signal switching. This makes the CMOS analog switch suitable for applications where maintaining audio quality is an important design requirement.

The device also supports a continuous channel current of up to ±300mA, providing additional flexibility for different audio signal-routing requirements.

Negative Signal Transmission for Flexible Audio Switching

One of the key advantages of the ETQ5228M is its ability to transmit negative analog signals.

The supported signal voltage range is -2V to VCC, allowing the switch to handle audio signals that extend below the ground reference. This can simplify the signal path and reduce the need for additional external circuitry in certain audio applications.

For automotive audio designs, this feature gives engineers greater flexibility when connecting different audio sources and routing them to a common output.

Low-Power CMOS Analog Switch for Automotive Systems

Power efficiency is another important consideration in modern automotive electronics, especially for systems that remain powered during standby conditions.

The ETQ5228M has a standby supply current of only 500nA, helping reduce unnecessary power consumption when the audio switching function is not actively required.

The wide 1.8V to 5.5V supply range also makes the device compatible with different low-voltage power architectures used in automotive electronic systems.

Combined with its -40°C to 105°C operating temperature range, the ETQ5228M provides a practical CMOS analog switch solution for automotive environments where both low power consumption and reliable operation are required.

Typical Application of the ETQ5228M

The ETQ5228M can be used to switch between multiple audio sources and connect the selected signal to a speaker or other audio output.

In a typical application, two audio sources are connected to the switching channels of the ETQ5228M, while an MCU controls the switching states. This allows the system to select the required audio source without requiring multiple discrete switching components.

The device can therefore help simplify the audio signal path and reduce PCB complexity.

Typical applications include:

– Automotive T-BOX

– In-vehicle audio systems

– Audio source selection

– Automotive infotainment systems

– Other automotive electronic modules requiring analog signal switching

Why Choose the ETEK ETQ5228M?

When selecting a CMOS analog switch for automotive audio applications, engineers need to consider signal quality, switching capability, power consumption, and operating conditions.

The ETEK ETQ5228M combines these requirements in one device:

Dual SPDT architecture provides two independent switching channels for flexible audio routing.

0.4Ω low on-resistance helps reduce the impact of the switch on the analog signal path.

0.06% THD+N supports audio applications requiring low distortion.

-2V to VCC signal range allows negative analog signals to be transmitted.

500nA standby current helps reduce power consumption in standby conditions.

-40°C to 105°C operating temperature supports demanding automotive environments.

With these features, the ETQ5228M offers an integrated and efficient approach to automotive audio signal switching.

FAQ About CMOS Analog Switch

1.Can the ETQ5228M switch between two audio sources?

Yes. The dual-SPDT architecture of the ETQ5228M allows designers to route different audio signals through two independent switching channels. An MCU can control the switch states to select the required audio source and connect it to the corresponding output path.

2.Why does an audio analog switch need to support negative voltage?

Audio signals are typically AC signals that can swing both above and below a reference voltage. Therefore, an analog switch for audio needs to handle negative portions of the waveform without significantly affecting signal integrity.

The ETQ5228M supports a signal voltage range of -2V to VCC, allowing it to transmit negative analog signals and making it suitable for audio signal switching applications.

3.How does the ETQ5228M help reduce power consumption?

The ETQ5228M has a standby supply current of only 500nA. When the switching function is not actively required, its low standby current can help reduce unnecessary power consumption in automotive electronic systems.

Conclusion

The demand for reliable and low-power audio signal switching continues to grow as automotive electronic systems become more sophisticated. The ETEK ETQ5228M provides a compact CMOS analog switch solution with dual SPDT channels, 0.4Ω low on-resistance, ±300mA channel capability, -2V to VCC signal transmission, 0.06% THD+N, and 500nA standby current.

For automotive T-BOX, infotainment, audio source selection, and other in-vehicle audio applications, the ETQ5228M helps engineers achieve flexible signal routing while maintaining audio performance and system efficiency.

👉Learn more about the ETEK ETQ5228M: ETEK ETQ5228M Product Page

✉️Request Sample: https://www.etekmicro.com/sample