DJI MIC 2 continues the design style of the previous model and is smaller and lighter overall. At the same time, retro dialing wheels and transparent shell elements are incorporated to make the product more technological.

DJI MIC 2 supports stable wireless transmission up to 250 meters. It supports omnidirectional radio and focuses on optimizing the listening experience of human voices. Supports professional-grade 32-Bit floating-point internal recording, better retaining complete audio information through high dynamic range. Supports smart noise cancelling, which effectively reduces environmental noise and highlights the main voice. It also has a safety track function to prevent sonic boom.

The DJI MIC 2 transmitter has 8GB of built-in storage space, which can store about 14 hours of 48kHz 24-bit uncompressed audio. It can be used for audio backup when shooting or as a voice recorder. In terms of battery life, both the transmitter and receiver support 6 hours of battery life, and the charging case provides about 2 additional times of power supply. When the receiver is connected to a mobile phone, it can be used while charging. Let’s take a look at the detailed teardown report of DJI MIC 2.

01/ DJI MIC 2 Receiver Teardown

Remove the receiver back cover.

The internal structure of the cavity, the motherboard is fixed with screws.

Remove the screws and connectors to remove the motherboard.

The circuitry on the motherboard side of the receiver.

The circuit on the other side of the receiver mainboard is protected by a large-area shield.

Remove the shielding cover and see the circuit on the motherboard below.

The metal dome to which the antenna is connected.

3.5mm TRS camera connection port (orange) and 3.5mm monitoring headphone jack (black).

Actions ATS2831DL bluetooth audio SoC integrates bluetooth transceiver functions – while providing ultra-low latency high-quality audio signal transmission, it also uses the built-in high-performance DSP to implement back-end sound processing and AI noise cancelling algorithms to further improve the overall sound quality performance.

Actions ATS2831DL adopts CPU+DSP dual-core heterogeneous architecture and supports Bluetooth 5.3 standard, LE Audio and LC3+ codec. Integrated bluetooth radio frequency (RF), baseband, power management unit (PMU), audio codec and micro control unit (MCU) – integrating bluetooth transmitting and bluetooth receiving functions, complete specifications and leading performance.

ATS2831DL integrates low-latency transmission link, 48k high-definition audio codec, AI noise cancelling, 24-bit local recording and screen display. Supports AUXIN, USB, I2S, MIC, SD/MMC and other audio input sources. Supports full-format audio decoding and is compatible with mainstream bluetooth speakers and bluetooth headphones on the market. Supports 48K two-way high-definition voice simultaneous transmission, and is compatible with win7/8/10/11/MAC and other mainstream operating systems and mainstream call software. The end-to-end (the entire link from the transmitter to the receiver) delay is as low as 10ms, which is industry-leading. Supports the coexistence of LE audio and classic bluetooth.

Crystal oscillator that provides clock for bluetooth audio SoC, specification: 24.0MHz.

Silk screen 5830B IC.

Silk screen 73 FB IC.

Silk screen C 2AA IC.

Skyworks SKY66112-11 is a high-performance, fully integrated RF front-end module (FEM) designed for 2.4GHz ZigBee, thread and bluetooth smart applications.

Silk screen YBHY AAD2 IC.

Silk screen OBZ IC and 19E IC.

Power switch button.

Connect the ZIF connector of the trackwheel FPC.

YJ YJQ1216A PMOS, withstand voltage -20V, conductance resistance 17mΩ, used for interface protection function.

Another one of YJQ1216A PMOS.

Receptacle for connecting battery leads.

SouthChip SC89601S charging IC.

Silk screen N2B8C IC.

BTB connector to connect the screen FPC, from OCN, model: OK-14F030-04.

Silk screen 5Q4 A37 IC.

Actions ATS3085L is a highly integrated single-chip bluetooth audio solution. Based on the dual-core heterogeneous architecture of MCU+DSP, it also adds graphics acceleration engine, Sensorhub module, bluetooth radio frequency (RF), baseband, power management unit (PMU), audio codec, screen and sensor peripheral interface modules. It has the advantages of high performance, low power consumption and low cost.

ATS3085L greatly reduces power consumption while ensuring performance. The power consumption of the MCU is 16uA/Mhz@3.8V, and the power consumption of BR and BLE maintaining dual connections is <150μA@500ms.

ATS3085L adheres to Actions’ display design technology, including built-in 2D GPU, which supports regional blending acceleration, regional fill and copy acceleration, and text A4/A8 drawing acceleration. It supports translucent effect when sliding (the entire layer Alpha), and can directly access high-speed 2M DDR PSRAM without the need for intermediate links to guide data. These hardware design technologies can allow the UI interface of the watch to reach a refresh rate of up to 360*360@60Hz.

32.0MHz crystal oscillator provides clock for bluetooth audio solution.

Silk screen 72D IC.


Silk screen TBNq IC.

3PEAK TP2402 dual channel operational amplifier. The TP240x family consists of single, dual and quad CMOS operational amplifiers with low noise and rail-to-rail input/output – optimized for low-power, single-supply applications. The devices are rated for supply voltages ranging from 2.2V to 5.5V and consume only 3.5mA of quiescent current per channel, making them ideal for power-sensitive applications.

The BTB connector that connects the FPC contacts of the mobile phone adapter is from OCN, model: OK-14F016-04.

The bottom structure of the cavity is protected by a sponge pad attached to the middle battery. A screen is fixed on the upper cavity wall, an adapter contact FPC is provided below, and LDS laser antennas are printed on both sides through brackets.

Remove all components inside the cavity.

The FPC circuit of the dial wheel.

Rotary Encoder – Supports both rotation and press control.

FPC circuit for adapter contacts. The four metal dots above are the metal contacts connected to the charging case. Below is the Pogo Pin connector that connects to the adapter.

The BTB connector that connects the adapter contact FPC to the motherboard is from OCN, model: OK-14GM016-04.

Plastic parts for two printed LDS antennas.

The circuit inside the screen.

FocalTech FT3168 touch IC for screen touch control operation.

The screen is connected to the BTB connector of the motherboard, from OCN, model: OK-14GM030-04.

Information on the label of the built-in lithium battery of the receiver, model: BSX102-360-3.87-RX, rated energy: 1.3932Wh, rated capacity: 360mAh, nominal voltage: 3.87V, charging limit voltage: 4.45V, from Highpower Technology.

Wire plug connecting the battery to the motherboard.

Tear off the outer insulation protection, and silk screen information is printed on the battery cell, model number: HPT 531733.

The circuit on one side of the battery protection board.

Silk screen ZDSA’s integrated lithium battery protection IC is responsible for battery overcharge, overdischarge, and overcurrent protection.

02/ DJI MIC 2 Transmitter Teardown

Remove the front cover of the transmitter. The motherboard inside the cavity is fixed with screws and positioning posts, and a battery is placed under the motherboard.

Remove the top microphone grille and take out all the components inside the cavity – including the motherboard, battery, microphone and vibration motor.

The internal structure of the cavity, with an antenna in the lower right corner.

The circuit on the side of the transmitter motherboard.

The circuit on the other side of the transmitter motherboard.

The transmitter is also equipped with the Actions ATS2831DL bluetooth audio SoC, which is used to process the audio signals collected by the radio microphone and wirelessly transmit them to the receiver.

Silk screen 73 Ah IC.

Inside the transmitter is the Skyworks SKY66112-11 high-performance, fully integrated RF front-end module (FEM) – used to extend bluetooth range.

Silk screen 4512 AAF4 IC.

Silk screen IH OI IC.

Function buttons for power switch and bluetooth pairing.

LED indicator light for feedback connection status.

3.5mm TRS input interface.

Receptacle for connecting battery leads.

LED indicator for feedback on charging status.

Button to pause/start recording.

The metal dome to which the antenna is connected.

SanDisk SDINBDG4-8G eMMC 5.1 interface industrial-grade i NAND EMMC memory with a capacity of 8GB is used for recording function to store audio data.

Nuvoton NAU85L40YGB four-channel audio ADC with integrated microphone bias circuit – used for microphone voice signal acquisition and analog-to-digital conversion.


SouthChip SC89601S charging IC.

3PEAK TP2412 dual rail-to-rail output, single supply amplifier features low offset and input voltage, low current noise and wide signal bandwidth. The combination of low offset, low noise, very low input bias current and high speed allows it to be used in a variety of applications. Filters, integrators, photodiode amplifiers and high-impedance sensors all benefit from this performance combination. Audio and other communication applications benefit from the wide bandwidth and low distortion of these devices.

Silk screen OB6 IC and silk screen 19E IC.

A 24.0MHz crystal oscillator provides the clock for the bluetooth chip.

Silk screen 1 JC IC (left) and silk screen 5830B IC (right).

BTB connector for charging contact FPC, from OCN, model: OK-14F010-04.

The front of the built-in pickup of DJI MIC 2 wireless microphone – omnidirectional pickup.

Built-in vibration motor is used to provide vibration feedback when turning on and off, internal recording, muting, and noise cancelling.

The transmitter has built-in lithium battery label information, model: BSX102-360-3.87-TX, and the parameter information is consistent with that of the receiver.

There is silk screen information on the built-in lithium battery cell of the transmitter, model number: HPT 542125.

The circuit on one side of the battery protection board is equipped with an integrated lithium battery protection IC with silk screen ZDSA – responsible for battery overcharge, overdischarge, and overcurrent protection.

Take out the charging contact module.

The BTB connector that connects the charging contact FPC to the motherboard is from OCN, model: OK-14GM010-04.

All components of DJI MIC 2 wireless microphone.

03/ Summary

The appearance design of DJI MIC 2 has been optimized compared to the first generation. The receiver is equipped with a larger screen, which can better display information and operate control. A retro dial has been added, which can be used in conjunction with the camera to adjust parameters more harmoniously. The receiver is lightweight and can be used portably through the integrated collar clip and back clip magnet.

The transmitter and receiver wireless audio solutions use Actions ATS2831DL bluetooth audio SoC, which integrates bluetooth receiving and transmitting functions. Supports Bluetooth 5.3, 48k high-definition audio codec and AI noise cancelling, providing ultra-low latency high-quality audio signal transmission. The built-in CPU+DSP dual-core heterogeneous architecture can provide sufficient computing power for the product – combined with back-end sound processing and AI noise canceling algorithms to further improve audio quality.

Also built into both the transmitter and receiver are the Skyworks SKY66112-11 high-performance, fully integrated RF front-end module (FEM) – used to extend bluetooth range. They all use a 360mAh 3.87V high-voltage lithium battery, and the SouthChip SC89601S charging IC is responsible for charging the built-in battery.

In other aspects, the receiver screen is equipped with Actions ATS3085L single-chip bluetooth audio solution, FocalTech FT3168 touch IC and 3PEAK TP2402 dual-channel operational amplifier. The transmitter has a built-in omnidirectional pickup microphone and uses Nuvoton NAU85L40YGB four-channel audio ADC, PEAK TP2412 op amp, and SanDisk SDINBDG4-8G memory.

PS: Translated from 52audio

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