The growing popularity of short videos, live streaming, and interviews is driving wireless lavalier microphones toward smaller, lighter, and more portable designs.
Despite their compact size, these microphones still need to integrate wireless audio SoCs, power management circuits, batteries, and audio pickup components. This places higher demands on the size, frequency accuracy, and stability of quartz crystals.
Quartz crystals are commonly used to provide reference frequencies for wireless audio SoCs and RF transceivers, making them important components in wireless communication systems.
Wireless audio SoCs and RF transceivers have specific requirements for external reference frequencies. Crystal selection should begin by confirming the required frequency according to the chipset specifications.
24 MHz, 26 MHz, and 32 MHz are common frequency options in wireless audio devices.
PCB space is limited in wireless lavalier microphones, making smaller crystal packages beneficial for compact designs.
2016 (2.0 × 1.6 mm) and 1612 (1.6 × 1.2 mm) packages are suitable for portable wireless devices. The smaller 1612 package further reduces PCB footprint, leaving more space for batteries, power management, and RF components.
As the reference frequency source for wireless SoCs, quartz crystals must meet the system's frequency accuracy requirements.
In addition to initial frequency tolerance at room temperature, frequency changes caused by temperature variations should also be considered.
Therefore, frequency tolerance, total frequency deviation, and operating temperature range are important selection parameters.
Matching frequency and package size alone is not sufficient for passive quartz crystal selection.
Engineers should also verify load capacitance (CL), equivalent series resistance (ESR), and drive level according to the SoC oscillator circuit requirements to ensure reliable startup and stable operation.
To meet the miniaturization requirements of wireless lavalier microphones, YXC recommends two compact quartz crystal series: YSX1612SL and YSX211SL.
The YSX1612SL features a miniature 1612 package that helps reduce PCB footprint, making it suitable for wireless lavalier microphones with strict space and size requirements.
Key Specifications:
● Package Size: 1.6 × 1.2 mm
● Common Frequencies: 24 / 26 / 32 MHz
● Frequency Tolerance: ±10 ppm
● Total Frequency Deviation: ±20 ppm
● Operating Temperature: -40°C to +85°C
The YSX211SL features a compact 2016 package, meeting the requirements of wireless lavalier microphones, Bluetooth audio devices, and other portable wireless applications for small size and frequency stability.
Key Specifications:
● Package Size: 2.0 × 1.6 mm
● Common Frequencies: 24 / 26 / 32 MHz
● Frequency Tolerance: ±10 ppm
● Total Frequency Deviation: ±20 ppm
● Operating Temperature: -40°C to +85°C
For wireless lavalier microphones with stricter PCB space and device size requirements, the 1612 package may be preferred.
If PCB space is relatively sufficient, the 2016 package can be selected based on the chipset requirements and overall BOM design.
In either case, engineers should verify frequency, load capacitance, ESR, frequency accuracy, and operating temperature before finalizing the selection.
YXC offers a range of miniature quartz crystals to support wireless lavalier microphones, Bluetooth audio devices, and other portable wireless applications.
For detailed specifications, sample requests, or technical support, please contact YXC.
