LM848 - Wi-Fi 6 (802.11ax) and Bluetooth 5.2 USB Combo Adapter | LM Technologies
MPN： LM848 ✓ 啟用中LM848 概覽
A USB combo adapter is a peripheral that bridges a host processor to two or more wireless radios through a standardized serial bus. In the wider connectivity taxonomy, this places the LM848 as a USB peripheral module -> wireless network adapter -> combo radio module -> RF subsystem, sitting beneath the host's network stack and above the antenna. USB-based combo adapters are favored over SDIO or PCIe cards in industrial and prototyping environments because they avoid slot allocation, simplify thermal management, and survive hot-swap events without rebooting the host.
The headline features of the LM848 include 802.11ax 2x2 operation, WPA3 security compliance, dual-band 2.4 GHz / 5 GHz / 6 GHz coverage where supported by regional regulations, Bluetooth 5.2 with LE Audio and Long Range (PHY Coded), and a USB 3.0 Type-A form factor that draws bus power. The device advertises ultra-fast throughput that suits video streaming, edge AI gateways, and dense Wi-Fi deployments where 802.11ac throughput would saturate.
Architecturally, the LM848 pairs an 802.11ax SoC with a BT 5.2 companion chip, sharing a single USB endpoint group over a USB 3.0 SuperSpeed link. The radio front end is tuned for worldwide regulatory domains, and the firmware exposes standard nl80211/cfg80201 (Linux) and MediaTek/Realtek-style vendor extensions (Windows) for throughput tuning.
Typical applications include industrial IoT gateways, in-vehicle infotainment prototyping, point-of-sale terminals, medical telemetry docks, and digital signage where Wi-Fi 6 capacity and Bluetooth coexistence are both required. When designing with the LM848, ensure the host supplies a USB 3.0 port capable of delivering 900 mA, and place the antenna at least 20 mm from any metal enclosure walls to preserve EIRP margin.
直接替換替代品，適用於 LM848 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM848 （相同外形與佔位） — 差異在於 Channel Bandwidth, Host Interface, Wireless Standard.
LM821
✅ 直接替換📋 參考替代品（不在目錄中）
LM823
✅ 直接替換聯絡詢價
查看資料表 →LM848-IND
✅ 直接替換📋 參考替代品（不在目錄中）
Edimax EW-7822UAC
✅ 直接替換📋 參考替代品（不在目錄中）
TP-Link Archer TX20U
✅ 直接替換📋 參考替代品（不在目錄中）
LM848 規格（製造商公布）
| Wireless Standard | Wi-Fi 6 (IEEE 802.11ax) |
| Bluetooth Version | Bluetooth 5.2 |
| Host Interface | USB 3.0 (USB 3.1 Gen 1 SuperSpeed) |
| Bluetooth Profile | HCI (Host Controller Interface) |
| Wi-Fi Spatial Streams | 2x2 MU-MIMO |
| Channel Bandwidth | 20/40/80/160 MHz |
| Security | WPA3 |
| Operating Bands | 2.4 GHz, 5 GHz (6 GHz region-dependent) |
| OFDMA Support | Yes (uplink/downlink) |
| Bluetooth LE Audio | Yes |
| Bluetooth Long Range (PHY Coded) | Yes |
| Form Factor | USB Type-A dongle |
| Bus Powered | Yes (USB 5V) |
| Supported OS | Linux, Windows, Android |
| Antenna | Integrated onboard antenna |
LM848 介面與連接器
LM848 依製造商公布提供以下介面與連接器：無線, 藍牙。擴充排針腳位、連接器腳位編號與電氣限制均定義於製造商文件中。
| 無線 | Wi-Fi 6 (IEEE 802.11ax) |
| 藍牙 | Bluetooth 5.2 |
請參閱 製造商文件 以取得完整的擴充排針腳位定義與連接器腳位編號。
典型應用
LM848 適用於 7 應用s: Industrial IoT Gateways, In-Vehicle Infotainment Prototyping, Point-of-Sale Terminals, Medical Telemetry Docking Stations, Digital Signage and Kiosks, Edge AI and Robotics Development, ProAV and Wireless Conferencing.
Industrial IoT Gateways
The LM848's combination of Wi-Fi 6 2x2 MU-MIMO and Bluetooth 5.2 LE on a single USB 3.0 uplink makes it ideal for industrial IoT gateways that aggregate sensor telemetry and provision nearby devices. The 160 MHz channel support and OFDMA scheduling deliver aggregate throughput well above 1 Gbps in dense RF environments, while the BT 5.2 LE side handles beacon-based provisioning. Place the dongle on a USB 3.0 port of the gateway SBC, with the antenna at least 20 mm from enclosure metal.
推薦
In-Vehicle Infotainment Prototyping
In-vehicle infotainment (IVI) prototypes benefit from the LM848's WPA3 security and Wi-Fi 6 capacity for cabin hotspot use, plus BT 5.2 for hands-free audio and LE Audio passenger streaming. The dongle's bus-powered USB-A form factor docks directly to an automotive-grade head unit or aftermarket head unit without requiring M.2 slot allocation. Validation against AEC-Q100 is not implied; for production automotive deployment, choose a module with explicit automotive qualification.
推薦
Point-of-Sale Terminals
Modern point-of-sale (POS) terminals use Wi-Fi for store network backhaul and Bluetooth for peripherals such as barcode scanners, payment terminals, and receipt printers. The LM848 satisfies both roles on a single USB-A dongle, eliminating two separate radios. WPA3 secures transaction traffic, and OFDMA keeps latency low when multiple POS terminals contend for the same access point during peak hours.
推薦
Medical Telemetry Docking Stations
Medical telemetry docks transmit vital signs over Wi-Fi while pairing Bluetooth LE medical devices such as pulse oximeters and glucose meters. The LM848's LE Audio support enables low-latency streaming from bedside sensors, and WPA3 protects patient data in transit. Bus-powered operation simplifies the dock's medical-grade isolation design by eliminating a separate regulator for the radio.
推薦
Digital Signage and Kiosks
Digital signage and interactive kiosks require reliable high-bandwidth wireless for content updates and customer Wi-Fi access. The LM848's 2x2 MU-MIMO supports multiple simultaneous client connections in busy retail environments without throughput collapse. Its USB-A mechanical envelope fits behind slim kiosk bezels where M.2 cards cannot be accommodated.
推薦
Edge AI and Robotics Development
Edge AI and robotics platforms need high-throughput wireless for fleet learning and OTA updates, plus Bluetooth for short-range commissioning and debugging. The LM848's USB 3.0 uplink keeps the radio off the M.2/PCIe bus, freeing those high-speed lanes for AI accelerators and vision SoCs. Plug the dongle into any spare USB 3.0 port of the robot's compute module and configure via Linux cfg80211.
推薦
ProAV and Wireless Conferencing
ProAV installations increasingly rely on wireless conferencing systems (Barco ClickShare, Microsoft Teams Rooms) that need high-throughput Wi-Fi for screen mirroring plus Bluetooth for room audio. The LM848's Wi-Fi 6 2x2 spatial streams sustain 4K mirroring without compression artifacts, and BT 5.2 LE Audio streams multi-channel room audio with broadcast isochronous channels. Drop it into any conferencing host with a USB 3.0 port.
推薦
推薦產品摘要
工程參考資料，適用於 LM848 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM821 | LM823 | Edimax EW-7822UAC | TP-Link Archer TX20U |
|---|---|---|---|---|---|
| Brand | LM Technologies | LM Technologies | LM Technologies | Edimax | TP-Link |
| Package | USB Type-A dongle | USB Type-A dongle - same | USB Type-A dongle - same | USB Type-A dongle - same | USB Type-A dongle - same |
| Wi-Fi Standard | Wi-Fi 6 (802.11ax) | Wi-Fi 5 (802.11ac) | Wi-Fi 6 (802.11ax) | Wi-Fi 6 (802.11ax) | Wi-Fi 6 (802.11ax) |
| Bluetooth Version | BT 5.2 | BT 5.0 | BT 5.2 | No Bluetooth | No Bluetooth |
| Host Interface | USB 3.0 | USB 2.0 | USB 3.0 | USB 3.0 | USB 3.0 |
| OFDMA Support | Yes | No | No (basic only) | Yes | Yes |
| Security | WPA3 | WPA2 | WPA3 | WPA3 | WPA3 |
| Spatial Streams | 2x2 MU-MIMO | 2x2 MU-MIMO | 2x2 MU-MIMO | 2x2 MU-MIMO | 2x2 MU-MIMO |
| Channel Bandwidth | Up to 160 MHz | Up to 80 MHz | Up to 160 MHz | Up to 160 MHz | Up to 160 MHz |
主要差異化特點
- Combined Wi-Fi 6 + Bluetooth 5.2 on a single USB-A dongle (對比Edimax EW-7822UAC)
- Higher 802.11ax generation with full OFDMA (對比LM821)
- WPA3 security across both radios (對比LM821)
設計說明
USB 3.0 ports must supply 900 mA to enumerate the LM848 at SuperSpeed. If the host can only guarantee 500 mA (USB 2.0), the radio falls back to USB 2.0 and Wi-Fi throughput is capped at ~480 Mbps. Add an external powered USB 3.0 hub if the host port cannot deliver 900 mA.
Keep at least 20 mm of clearance around the LM848's onboard antenna. Metal enclosures, LCD panels, and battery cells detune the antenna and erode EIRP margin. For metal enclosures, cut a plastic window over the dongle or route a short U.FL pigtail to an external antenna (verify with manufacturer first).
Do not plug the LM848 into a USB 3.0 port adjacent to a USB 3.0 SSD - the 2.4 GHz harmonics of SuperSpeed signaling can desense the radio. If noise is observed, move the dongle to a different USB root port, use a shielded USB 3.0 extension cable, or enable USB 3.0 radio coexistence filters in the driver.
合規資訊
RoHS compliance per LM Technologies product page. AEC-Q100 not applicable - USB dongle form factor is consumer/industrial. Halogen-free and conflict-mineral declarations not explicitly stated in the LM848 datasheet v1.0; verify with manufacturer sales for environmental certificates.