The Sennheiser Momentum True Wireless 2 earbuds. Source: TechInsights
Editor’s note: Information from this teardown is supplied courtesy of TechInsights. Learn more about the Sennheiser Momentum True Wireless 2 here.
Earbuds are ubiquitous in audio communications as consumers desire smaller form factor listening devices instead of bulky headphones.
While headphones still flourish in the audio market for audiophiles, gaming and other entertainment like streaming, earbuds have become extremely popular when traveling, working out or outdoor (or indoor) exercising.
When these first emerged, earbuds were not nearly as good quality wise compared to headphones. But those days are over as earbuds rival, if not surpass, many headphones today with great audio and the ability to do that much more through their Bluetooth connectivity with smartphones. This includes the answering of phone calls or texts as well as the ability to listen to streaming or even radio options through the phone.
Sennheiser is a standard in the audio consumer market offering every type of audio listening format. Its Momentum True Wireless 2 earbuds include microelectromechanical systems (MEMS) sensors and Bluetooth ICs to enable these functions. Some of the main suppliers include Knowles, Qualcomm, Texas Instruments, ST Microelectronics and many more.
The following is a partial deep dive into the wireless earbuds conducted by TechInsights.
Availability: Worldwide
Price: $230
Target market: Consumer
Released: March 2020
Ear bud board
The ear bud boards for the right and left audio devices include a handful of electronic components that are needed in the proper operation of the Sennheiser Momentum True Wireless 2 audio system. This includes:
- Qualcomm’s Bluetooth 5.1/audio SoC
- Knowles’ MEMS Microphone
- Semtech’s capacitive proximity controller
- Texas Instruments’ battery protection and dual 200 mA/3.0 V LDO regulator
- GigaDevice’s serial flash memory
- Dyna Image’s ambient light/proximity sensor
(Learn more about sensors on GlobalSpec.com)
The battery board found on the Sennheiser Momentum True Wireless 2 earbuds. Source: TechInsights
Battery subsystem
The battery board includes the necessary electronic components to operate the battery inside the charging case for the True Wireless 2 earbuds. This includes a battery protection IC as well as power management ICs.
Charging case board
The charging case board inside the Sennheiser Momentum True Wireless 2 earbuds contains the main 32-bit ARM Cortex-M0+ microcontroller from ST Microelectronics. Other electronic components found on this board include:
- Texas Instruments’ 200 mA/3.0 LDO regulator, linear battery charger and boost converters
- USB Type C ICs
- Charging pin connectors
- Battery management connectors
(Learn more about battery ICs on GlobalSpec.com)
The components found inside the Sennheiser Momentum True Wireless 2 earbuds. Source: TechInsights
Major components
- $1.89 — Bluetooth 5.1/Audio Soc (Qty: 1)
- $1.89 — Bluetooth 5.1/Audio Soc (Qty: 1)
- $1.80 — Top enclosure (Qty: 2)
- $1.46 — 8-layer rigid flex (Qty: 1)
- $1.46 — 8-layer rigid flex (Qty: 1)
- $1.16 — Battery subsystem (Qty: 1)
- $0.95 — Speaker earbud (Qty: 1)
- $0.95 — Speaker earbud (Qty: 1)
- $0.70 — 32-bit ARM Cortex M0+ microcontroller (Qty: 1)
- $0.61 — Top enclosure (Qty: 1)
