RN52 - Integrated Amplifier Driving 8 Ω Speakers

Can we use an 8 Ω speaker with the RN52 module? Does it cause any issue?

According to the module datasheet, it is possible to use the 8 Ω speaker (see the "Speaker Output" section). The speaker output is capable of driving a speaker with an impedance of at least 8 Ω directly. The overall gain of the speaker output is approximately -21 dB to 0 dB in 1.5 dB steps.

Alternatively, you can add an 8 Ω resistor. Note that adding an 8 Ω resistor in series will match impedance correctly and will reduce the voltage to the speaker by 50 percent. This will have the effect of reducing power to the speaker (or headphones) by a factor of four because power is proportional to V².

© 2024 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.